kadaladi taluk, ramanathapuram district, tamil...

KADALADI TALUK, RAMANATHAPURAM DISTRICT, TAMIL NADU

MAY, 2016

CONSULTING ENGINEERS

191, ANNA SALAI, CHENNAI - 600006

Feasibility Report for 5 x 800 MW Kadaladi Super Critical

Thermal Power Project at Kadaladi Taluk, Ramanathapuram District,Tamil Nadu

Job No: 15Z03

5x800 MW-KSCTPP-FR-TANGEDCO INDEX SE/E/TH(P)/EE/E/KDI/F.DPR/P.O.NO.3/D.3/2016

- 1 -

FEASIBILITY REPORT

FOR 5 X 800 MW KADALADI SUPER CRITICAL THERMAL POWER PROJECT

AT KADALADI TALUK RAMANATHAPURAM DISTRICT TAMIL NADU

I N D E X Section DESCRIPTION PAGE NO

1.0 INTRODUCTION AND EXECUTIVE SUMMARY 1-15

1.1 Introduction 1

1.2 TANGEDCO – An Overview 2

1.3 Executive Summary 4

1.4 Project at a Glance 8

2.0 NEED FOR THE PROJECT 16-30

2.1 Power Scenario: Introduction 16

2.2 Power Scenario in India 17

2.3 Power Scenario in Southern Region 20

2.4 Power Scenario in Tamil Nadu 23

2.5 Justification of the Project 26

3.0 BASIC REQUIREMENTS 31-44

3.1 Introduction 31



Job No: 15Z03


- 2 -

3.2 Land Area requirement & Availability 32

3.3 Water Requirement 37

3.4 Fuel Requirement 38

3.5 Power Evacuation 42

3.6 Other Infrastructural Requirements 42

4.0 SITE FEATURES 45-56

4.1 Introduction 45

4.2 Justificaiton & Discussion on Selected Site 46

4.3 Feasibility Consideration 51

5.0 TECHNICAL FEATURES 57-124

5.1 Introduction 57

5.2 Thermodynamic Cycle 57

5.3 Main Plant & Equipment 60

5.4 Auxiliary System 72

5.5 Electrical System & Equipment 100

5.6 Control & Instrumentation 110

5.7 Plant Layout 120

5.8 Civil Engineering Aspects 123

6.0 ENVIRONMENTAL ASPECTS 125-142

6.1 Introduction 125

6.2 Environmental Pollution from a Thermal Power Plant & Controlling Measures 127



Job No: 15Z03


- 3 -

6.3 Basic Information for Environmental Clearance 140

6.4 Ash Management Plan 141

6.5 Gypsum Management Plan 142

7.0 PROJECT MANAGEMENT 143-149

7.1 Introduction 143

7.2 Construction Facilities 144

7.3 Organisation Set-up for Plant Construction 147

7.4 Safety & Health Hazard Monitoring 148

7.5 Security 149

7.6 Labour Welfare & Statutory Regulations 149

8.0 PROJECT IMPLEMENTATION& ORGANISATION (O&M) 150-166

8.1 Project Implementation 150

� Introduction

� Project Organisation of the owner

� Project Execution

� Project Monitoring, Co-ordination & Control

� Role of Consultant

� Project Implementation Schedule

8.2 Organisation Structure 160

� Philosophy of Plant Design & Operation

� Organizational Set-up for Plant Operation

� Training of Personnel



Job No: 15Z03


- 4 -

9.0 PROJECT COST ESTIMATE & FINANCIAL ASPECTS 167-173

9.1 Basis of Estimates 167

9.2 Project Cost Estimate 171

9.3 Estimate of Cost of Generation 171

9.4 Recommendations & Follow-up Actions 172



Job No: 15Z03


- 5 -

Annexure - 3.1 � Sea Water Analysis

Annexure - 3.2 � Estimation of Consumptive Water Requirement

Annexure - 3.3 � Analysis of Coal

Annexure – 4.1 � Comparison of Alternate Sites

Drawing No.15ZO3-004-DWG-M-001 � Vicinity Map

Drawing No.15ZO3-004-DWG-M-002 � Site Location Map

Drawing No.15ZO3-004-DWG-M-003 � Plot Plan (2 Sheets)

Drawing No.15ZO3-004-DWG-M-008 � Coal Connectivity Route Map

Annexure – 5.1 � Brief Technical Features of Major Systems & Equipment

Drawing No.15ZO3-005-DWG-M-004 � Heat Balance Diagram (Typical)

Drawing No.15ZO3-005-DWG-M-005 � Water Balance Diagram

Drawing No.15ZO3-005-DWG-M-006 � Flow Diagram – Coal Handling System

Drawing No.15ZO3-005-DWG-M-007 � Flow Diagram – Ash Handling System



Job No: 15Z03


- 6 -

Drawing No.15ZO3-005-DWG-E-001 � Single Line Diagram – Electrical System

Annexure – 6.1 � List of Basic Equipment/

Instruments for Environmental Monitoring & Testing

Drawing No.15ZO3-006-DWG-M-009 � Waste Water Management Scheme

Drawing No. 15ZO3-007-DWG-M-010 � Organisation Chart

Drawing No. 15ZO3-008-DWG-M-011 ��Organisation Chart (O&M Team)

Drawing No. 15ZO3-008-DWG-M-012 � Project Schedule Annexure - 9.1 � Project Cost Estimate

Annexure - 9.2 (2 sheets) � Financial Tables IDC

�



Job No: 15Z03

5x800 MW-KSCTPP-FR-TANGEDCO SEC - 1 SE/E/TH(P)/EE/E/KDI/F.DPR/P.O.NO.3/D.3/2016

- 1 -

INTRODUCTION AND EXECUTIVE SUMMARY 1.1 INTRODUCTION: M/s Tamil Nadu Generation and Distribution Corporation

Limited (TANGEDCO) owns and operates a number of thermal

power stations in the state of Tamil Nadu now propose to set up

a thermal station of 5x800MW capacity in Kadaladi Taluk of

Ramanathapuram district. The station would adopt supercritical

technology.

The proposed 5x800MW station would require about 11.47 MTPA

(Million tons per annum) (at 85% PLF) using 100% Imported

coal (Best Coal), 13.65 MTPA (at 85% PLF) using blended coal

(Design Coal) with ratio of 30% Indigenous coal and 70%

Imported coal and 15.59 MTPA (at 85% PLF) using blended coal

(Worst Coal) with ratio of 50% Indigenous coal and 50%

Imported coal. The Imported Coal will be from Indonesia or any

other country and Indigenous coal will be from Talcher, Odisha.

Daily coal requirement at MCR is estimated at 44000 Metric Ton

(considering Design coal) for the plant. The coal will be received

at Thoothukudi sea port and from there it will be transported to

project site by rail route. Consumptive water would be drawn

from the Sea, the coastal line is at aerial distance of around 2.3

km on the Southern side of the proposed project.



Job No: 15Z03


- 2 -

Development Consultants Private Limited has been entrusted by

M/s Tamil Nadu Generation and Distribution Corporation

Limited (TANGEDCO) to prepare Feasibility report and Detailed

Project Report for establishing 5x800MW Kadaladi Super critical

Thermal Power Project.

1.2 TANGEDCO – AN OVERVIEW:

On 1st July 1957, Tamil Nadu Electricity Board came into being

and has remained the energy provider and distributor all these

years. During the period the Government have extended the

electrical network to all the villages and towns throughout the

state. After 53 years of journey on 1st of November 2010 it has

restructured itself into TNEB Ltd; Tamil Nadu Generation and

Distribution Corporation (TANGEDCO) Ltd; and Tamil Nadu

Transmission Corporation (TANTRANSCO) Ltd.

MISSION OF THE GOVERNMENT:

Tamil Nadu Generation and Distribution Corporation limited is

making progress in Generation and Distribution sector. It is

happy to inform that the electrification of all villages and towns

were completed and also electrification of all households are

under progress.

GENERATION:

To satisfy the energy needs of the state, Tamil Nadu Generation

and Distribution Corporation Limited has installed generating

stations of capacity 11884.44 MW which includes State, Central



Job No: 15Z03


- 3 -

share and Independent power producers. Besides, the state has

installations in renewable energy sources like windmill, Biomass

and Cogeneration up to 8219.67 MW. Due to the astronomical

increase in energy demand in future, the state has proposed new

generation projects for the next 5 years.

DISTRIBUTION:

TANGEDCO has a consumer base of about 252.32 lakh

consumers (2013-14). 100% rural electrification has been

achieved. Per Capita consumption of Tamilnadu is 1196 units

(2013-14). To achieve the goal of electrification of all

households, the Government has launched the Rajiv Gandhi

Grameen Vidyutikaran Yojana (RGGVY) scheme. Where grid

connectivity is not feasible or not cost effective, Decentralised

Distributed Generation is permitted. To achieve reliable and

quality power supply and minimise the loss of energy, MOP/GOI

has launched the Restructured APDRP scheme under 11th five

year plan and the same is being implemented by TANGEDCO.

RESTRUCTURING OF ERSTWHILE TNEB: In the G.O Ms No 114 dated 08.10.2008, Government of Tamil

Nadu has accorded approval in-principle for the re-organisation

of TNEB by the establishment of a holding company, by the

name TNEB Ltd and two subsidiary companies, namely Tamil

Nadu Transmission Corporation Ltd (TANTRANSCO) and Tamil

Nadu Generation and Distribution Corporation Ltd (TANGEDCO)



Job No: 15Z03


- 4 -

with the stipulation that the aforementioned companies shall be

fully owned by Government.

1.3 EXECUTIVE SUMMARY: M/s Tamil Nadu Generation and Distribution Corporation

Limited (TANGEDCO), has proposed to establish 5x800MW

Coal based Kadaladi Super Critical Thermal Power Project using

imported coal from Indonesia.

In Section-2 of the report, existing power situation of the

country and the state have been discussed to ascertain the

marketability of power from the proposed station.

In Section-3 of the report, the basic requirement for setting-up

a thermal power station namely – land, water, fuel, power

evacuation, transportation logistics and infra-structure are

discussed.

In Section-4 of this report, Salient features of the different sites

are furnished. The selected Project Site is located in Tharaikkudi,

Kannirajapuram and Narippaiyur villages of Kadaladi Taluk,

Ramanathapuram District. .

In Section-5 of the report, the technical features of the 800

MW set size outlining the design parameters of main plant and

equipment are discussed. A reheat steam cycle with

regenerative feed heating arrangement operating at supercritical

range has been proposed.



Job No: 15Z03


- 5 -

The station envisages supply of imported coal from Indonesia or

by any other country and Indigenous coal from Talcher, Odisha

by ship upto Thoothukudi Port and then by rail to the site. Plant

water supply to the plant is planned from the Gulf of Mannar,

the coast line is at a distance of around 2.3 km on the Southern

side of the project site. Seawater would be directly used for

condenser cooling and the fresh/sweet water requirements

would be met by installation of a RO desalination plant.

Re-circulating cooling water system with natural Draft cooling

towers is envisaged for the station. The fly ash generated is

proposed to be handled pneumatically in dry mode up to fly ash

silos and transported through truck for utilization by end users

and in case of exigency ash from the fly ash silos will be

conveyed to ash pond in slurry form. Salient technical features

of auxiliary systems are furnished in Section-5 of this report.

The electric generators would be 3-phase, 50 Hz, hydrogen-

cooled, 3000 rpm machine with static or brushless excitation

system and would Generator voltage will be in the range of 27

kV or as per manufacturer’s standard at 0.85 power factor

(lagging). The electrical system proposed would be equipped

with adequately sized equipment and with generous redundancy

to ensure uninterrupted operation. In Section-5 of the report,

the electrical equipment and systems are discussed.

The proposed station envisages the state-of-the-art Digital

Distributed Control & Monitoring Information System (DDCMIS),



Job No: 15Z03


- 6 -

which will integrate various closed loop sub-systems, open loop

sub-systems, monitoring and information sub-system covering

the entire plant. The system will also integrate the various

proprietary control packages supplied by the main equipment

vendors for harmonious plant operation. In Section-5 of the

report, instrumentation & control philosophy of the proposed

station is dealt in adequate details.

The Plant layout for the proposed station has been developed

keeping in view optimum use of land available within the

identified land limit, direction of supplies of input, direction of

road access, operational ease and initial investment

requirement. Details of basic plant features and the relevant

layout within the identified plot are furnished in Section-5 of

this report.

To minimise emission of Suspended Particulate Matter (SPM)

along with boiler flue gases Electrostatic Precipitators of

adequate size and fields will be provided at the exit of boiler to

bring down SPM emission level to less than 30 mg/Nm3. Total 3

(Three) stacks with stack height of 275 m (Two twin flue for four

boilers and one single flue high stack for one boiler) is

envisaged for the proposed units. Liquid effluents from the plant

will be properly treated before re-use and/or disposal. A detailed

scheme for the proposed unit has been provided in Section-5.

General discussion on the entire environmental aspects has

been provided in Section-6.



Job No: 15Z03


- 7 -

Implementation of the project is envisaged to be through EPC

contract mode of tendering. Therefore, engineering of facilities

and basic infrastructure at project site are to be arranged in

advance for smooth implementation of the project. The

manpower requirement during construction stage has been

estimated and this may undergo revision as per project

authority and selected contractor’s manpower deployment.

Details of the construction facilities are discussed in Section-7.

In Section-8 of the report, O&M staff requirement for operating

and maintaining the plant is narrated. The manpower

requirement for O&M is around 2880 persons. The Man per MW

ratio works out to 0.72 (as per the Working Group on Power 12th

Plan Manpower projection for XIII plan). This may undergo

revision as per project authority. The training requirements of

O&M personnel are also discussed under this section.

The commercial operation (COD) for different units of the

project from the date of Letter of Award to project Proponent

(zero date) shall be as below.

� Commercial operation of Unit # 1 : 42 months

� Commercial operation of Unit #2 : 45 months






Job No: 15Z03


- 8 -

The Project Execution, Monitoring and Control, Project Schedule

have been discussed under Section-8 of the report.

Based on available quotes and in-house data for various

equipments, the project cost estimate of 5x800MW has been

worked out. The total capital outlay will be of Rs.30,827.65

Crores (Including interest during construction working capital,

working capital margin and other financial charges). The details

are furnished in Section-9 of the report.

1.4 PROJECT AT A GLANCE:

GENERAL:

Project Authority : Tamil Nadu Generation and Distribution Corporation Limited (TANGEDCO). A Government of Tamil Nadu Undertaking.

Project : Imported coal based 5x800MW Kadaladi Super Critical Thermal Power Project.

Selected Location : The selected site is located in Tharaikkudi, Kannirajapuram and Narippaiyur villages of Kadaladi Taluk, Ramanathapuram District in Tamil Nadu State. The coordinates of the selected site is as below

Node Latitude LongitudeB1 908’33.5” N 78022’33.1” E B2 909’15.2” N 78024’5.5” E B3 907’39.4” N 78024’16.9” E B4 906’52.6” N 78022’46.6” E



Job No: 15Z03


- 9 -

Nearest Major Town/City : Ramanathapuram, which is around 65 kms from the proposed site and Thoothukudi city which is at a distance of 55 Kms.

Seismic Zone : Zone II as defined in - IS: 1893 –2002

Access by Road : The site is located on the North side of East Coast Road (ECR) connecting Ramanathapuram and Vembar.

Access by Rail : Ramanathapuram Railway Station, at 65 Kms and Thoothukudi Railway Station at 55 Kms from site

Access by Sea : Thoothukudi Port - 75 km from site.

Access by Air : Domestic airport at Thoothukudi (55 kms approx.)/International airport at Madurai (120kms approx.).

PRELIMINARY PROJECT PARTICULARS:

Main Fuel : Imported Coal with GCV 5642 kcal/kg is proposed to be imported from Indonesia or any other country and Indigenous coal with GCV 2800 kcal/kg from Talcher, Odisha.

Coal Requirement: Best Coal - 11.47 MTPA (Million

tons per annum) at 85% PLF (100% imported coal) 36974 metric T/day, 7394 TPD per unit



Job No: 15Z03


- 10 -

Design Coal - 13.65 MTPA at 85% PLF (70% imported: 30% indigenous) 44000 metric T/day, 8798 TPD per unit

Worst Coal – 15.59 MTPA at 85% PLF (50:50) 50240 metric T/day, 10048 TPD per unit

Fuel Transportation :Imported coal will be transported from the overseas supplier Indonesia or any other country and Indigenous coal from Talcher, Odisha to Thoothukudi Port by ship. For Coal connectivity a combination of existing Rail network, proposed new B.G line project and private railway line to the power plant is proposed. The coal from Thoothukudi port will be transported to site by one of the following rail route.

i) Coal will be transported by the existing railway line from Thoothukudi Port to Milavittan, then through the proposed B.G railway line (Kanyakumari to Karaikudi via Ramanathapuram) which aligns along the southern side of the proposed site and then by private railway line take-off from a location nearer to the Power Plant.

Orii) Coal will be transported by

the existing railway line from Thoothukudi Port to Milavittan, then through the



Job No: 15Z03


- 11 -

proposed new alignment of B.G railway line (Thoothukudi to Madurai via Melamarudur)to Melamarudur. From Melaamarudur to the power plant private railway line is proposed.

: Oil will be transported by road tankers.

Water : The estimated seawater requirement for the proposed Thermal Power Plant is 39,193m3/hr (41,150 m3/hr with 5% margin).

Consumptive water would be

drawn from the Sea and treated in Desalination plant at site. The sea coastline is at an aerial distance of around 2.3 km on the southern side of the proposed plant.

Land : About 1642 acres of land will be required for setting the power station including ash pond, coal stock pile etc. About 522 acres of land is considered for Bottom ash slurry disposal and fly ash slurry disposal. The ash dyke area is considered for the following % disposal of fly ash in slurry form

1st year 100% fly ash 2nd year 75% fly ash 3rd year 50% fly ash 4th year 25% Fly ash 5th Year 0% fly ash About 670 Acres of land is

considered for plant area, lay down area, storage area etc.



Job No: 15Z03


- 12 -

About 300 acres of land area will be required for Green belt and 150 acres land will be required for Township (to be indentified outside plant boundry).

Site Elevation : +6 m above Mean Sea Level (MSL).

TECHNICAL FEATURES OF 5X800 MW UNITS:

Power Generating Unit : Five units of 800 MW turbine generator sets fed by steam from coal fired Pulverised Fuel boilers operating at supercritical range.

Minimum Steam Condition : 255 bar (a) / 565 �C At Steam Turbine Inlet

Cooling System : Recirculating type cooling water system with wet type Natural Draft Cooling Towers using sea water as cooling medium.

Coal Handling System : Imported coal and Indigenous coal will be transported by Railway through BOBRN type wagons to site from Thoothukudi port. Coal storage (considering worst coal) for 30 days approx. and coal mill bunkers storage for 14 hours is proposed.

Ash Disposal System : Dry collection and disposal of Fly Ash, Dry extraction of bottom ash is considered. Ash will be primarily disposed by truck to end users as far as possible. Besides provision will be made to transport fly ash



Job No: 15Z03


- 13 -

(only during emergency) and Bottom ash through pipe line to the ash dump area (located nearby within the Plant boundary).

Power Evacuation : Power generated in the Power Plant would be available at 765 kV level in the station switchyard bus.

Power from this switchyard would be evacuated through two (2) 765kV double circuit lines to the nearest 765 kV pooling station, location to be decided by TANTRANSCO the local STU.

Power Off-take : Through TANTRANSCO.

Environmental Aspects : 3Nos. (Three) stacks with stack height of 275 m (Two twin flue stack and one single flue stack) is proposed for the 5x800MW units to meet the MOEF standard required for dispersion of particulate, SOX and NOX.

Provision of FGD & SCR is

proposed for this project to reduce the SOx & NOx levels (100 mg/Nm3) within the prescribed norms as specified in the latest MOEF notification.

: ESP Multiple field electrostatic precipitators with separation efficiency of around 99.9% is envisaged for steam generator. The limit for emission of particulate matters is 30 mg/Nm3

: The reject water (brines) from R.O desalination plant will be diluted to specified limits and the cooling



Job No: 15Z03


- 14 -

water blow down temperature will be brought down to specified limit. And then RO Reject along with blow down from cooling tower will be pumped back to sea as per Tamil Nadu Pollution Control Board (TNPCB) standards and the Ministry of Environment & Forest's (MOEF) notification. The other effluents from the plant area will be treated in ETP plant and Waste water generated from ETP will be treated and utilized for horticulture development and excess treated water is sent to ETP RO plant to achieve zero waste water discharged as per MOEF notification.

Manpower Requirement : 2880 personnel during plant operation for O&M. The Man per MW ratio works out to 0.72 (as per the Working Group on Power 12th

Plan Manpower projection for XIII plan)

OTHER FACILITIES:

Township : Residential Quarters for employees employed in critical services will be provided.

Mode of Implementation : The project will be executed on Engineering, Procurement & Construction (EPC) basis in one or multiple packages.

Project Time Frame : First unit of 800MW capacity Unit would be put into commercial operation in about 42 months from the date of Letter of Award to project Proponent and



Job No: 15Z03


- 15 -

subsequently the other units would be brought into commercial operation in 3 months interval for each unit

. COD Unit #1 :42 months COD Unit #2 :45 months COD Unit #3 :48 months COD Unit #4 :51 months COD Unit #5 :54 months

PROJECT COST & COST OF GENERATION:

Project Cost : Present day cost including Interest During Construction (IDC), financial charges and Working Capital Margin money is Rs.30,827.65 Crores.

Corporate social responsibility (CSR) : The value considered for the CSR

activities is not less than 0.4 % of the project cost.

Cost of Energy @ 85% PLF & 85% PAF is as below:-

� 1st year of full generation : Rs.3.42perkWh. (all 5 units are in operation)

� 25 years levelised tariff : Rs.5.70per kWh.

�



Job No: 15Z03


- 16 -

NEED FOR THE PROJECT

2.1 POWER SCENARIO: INTRODUCTION: Electricity is the prime mover of growth and is vital to the

sustenance of a modern economy. The projected growth of the

Indian Economy depends heavily on the performance and growth

of the power sector. The contribution of power sector in country’s

growth has grown significantly since independence. Total

installed generation capacity of the country, which was 1362 MW

at the time of independence, has increased to about 288005 MW

as on 31st January, 2016. It is the endeavor of the government

to ensure uninterrupted supply of electricity at affordable rates to

the following categories of consumers to sustain steady economic

growth:-

a. Domesticb. Commercial c. Public Lighting d. Public Water Works e. Irrigation f. Industrial (LT, HT less than 1 MW, HT 1 MW and above) g. Railway Traction h. Bulk Non-Industrial HT supply

Electricity is an essential requirement for all facets of our life. It

is the critical infrastructure on which the socio-economic

development of the country depends. Availability of reliable and

quality power at competitive rates to industry would make it

globally competitive and enable it to exploit the tremendous

potential of employment generation.



Job No: 15Z03


- 17 -

2.2 POWER SCENARIO IN INDIA

The power industry in India is historically being characterized by

energy shortages i.e. demand for electricity far exceeding the

supply. Due to inadequate generation supply and distribution

infrastructure, the per capita consumption of energy in India is

extremely low in comparison to most of the developing and

developed nations. However, as per CEA record, the per capita

consumption of electricity in India in the year 2012-13 stands as

918 kWh (SOURCE: Report on Power Scenario by CEA – SEP-

2014). Over the years, the electricity Industry has made

significant progress. The Present power scenario of India is

shown in the following tables

TABLE - 2.1 ALL INDIA INSTALLED CAPACITY (as on 31.01.2016)

(FIGURES IN MW)

Sect

or

Thermal

Nuc

lear

HYD

RO

R.E

.S

(MN

RE)

Tota

l

Coa

l

Gas

Die

sel

Tota

l

STATE �60550.50�

�6975.30� �438.57� �67964.37�

�0.00� �28052�

�1934.22� �97950.59�

PRIVATE �64707.38�

�9978.00� �554.96� �75240.34�

�0.00� �3120.00�

�36887.29�

�115247.63�

CENTRAL �49980.00�

�7555.33� �0.00� �57535.33� �5780 �11491.42� �0.00� �74806.75�

TOTAL 175237.88 24508.63 993.53 200740 5780 42663.42 38821.51 288004.97

% 60.8 8.5 0.3 69.7 2.0 14.8 13.5 100.00

SOURCE: CEA



Job No: 15Z03


- 18 -

TABLE - 2.2

ACTUAL POWER SUPPLY POSITION Pe

riod

Peak

Dem

and

(MW

)

Peak

Met

(MW

)

Peak

Def

icit

/ Sur

plus

(M

W)

Peak

Def

icit

/ Sur

plus

(%

)

Ener

gy R

equi

rem

ent

(MU

) Mill

ion

Uni

ts

Ener

gy A

vaila

bilit

y (M

U)

Ener

gy D

efic

it /

Surp

lus

(MU

)

Ener

gy D

efic

it /

Surp

lus

(%)

9TH PLAN END 78441 69189 -9252 -11.8 522537 483350 -39187 -7.5

10TH PLAN END 100715 86818 -13897 -13.8 690587 624495 -66092 -9.6

11TH PLAN END 130,006 116,191 -

13,815 -10.6 937,199 857,886 -79,313 -8.5

2012-13 135,453 123,294 -12,159 -9.0 998,114 911,209 -86,905 -8.7

2013-14 135,918 129,815 -6,103 -4.5 1,002,257 959,829 -42,428 -4.2

2014-15 148,166 141,160 -7,006 -4.7 1,068,923 1,030,785 -38,138 -3.6

SOURCE: CEA

It may be noted from the Table 2.2 there is always energy deficit

for all the plan period. The energy deficit in India is mainly

caused by slow progress in the capacity addition which in turn is

attributable to difficulty in land acquisition, shortage of coal, lack

of fund allocation and the clearances involved. The Indian

economy is directed by the successive five year plans that set out

targets for economic development in various sectors, including

power sector. During implementation of the last three (3) Five

Year Plans (the 9th, 10th and 11th Plans), 48%, 52% & 70% of the

targeted additional energy capacity could only be attained.

Capacity addition to the tune of approximately 20,000 MW,



Job No: 15Z03


- 19 -

21,000 MW & 55000 MW was achieved in 9th,10th & 11th Plan

periods. (Source: CEA POWER SCENARIO STATUS NOTE- SEP

2014).

The projection at the end of 13th plan on Indian Power Scenario

is furnished in the following table.

TABLE – 2.3

PROJECTION FOR THE END OF 13TH PLAN

REGION

ENERGY REQUIREMENT

(MU) Million Units

PEAK DEMAND (Mw)

Y e a r Y e a r2021-22 2021-22

Northern 576010 82784 Western 535851 83268Southern 506589 78857 Eastern 231646 33747N-Eastern 22421 3905 Andaman & Nicobar

505 89

Lakshadeep 60 16 All-India 1872517 271795

Source : 18th EPS.

The proposed project of 5x800 MW coal based power station at

Kadaladi taluk, in Ramanathapuram District, Tamil Nadu fits well

in the overall power scenario of the country and plant operation

at high plant load factor can be expected.



Job No: 15Z03


- 20 -

2.3 POWER SCENARIO IN SOUTHERN REGION: For the purpose of power planning and operation of regional grid

the Southern Region consists of the following

states/UT/Command area:

� Andhra Pradesh

� Telangana

� Karnataka

� Kerala

� Tamil Nadu

� Puducherry

All three sectors namely Central, State & Private contribute to

the power generation capability in the region. Power Grid

Corporation of India Limited (PGCIL), the central sector

constructs, operates and maintains transmission and

transformation facilities for inter-state and inter-region transfer

of power. The power generating capability in the region is

predominantly thermal.

The total installed capacity in Southern region as on 31.01.2016

is 71264.85 MW as in indicated in Table 2.4. Energy deficit to

the tune of (-) 35,269 MU (Million Units) and peak demand

deficit of (-) 8619 MW had been anticipated during the period of

2015-2016 in Southern Region refer Table 2.5.



Job No: 15Z03


- 21 -

TABLE - 2.4

SOUTHERN REGION INSTALLED CAPACITY (as on 31.01.2016) (FIGURES IN MW)

Sect

or

Thermal

Nuc

lear

HYD

RO

R.E

.S

(MN

RE)

Tota

l

Coa

l

Gas

Die

sel

Tota

l

STATE �14782.50� �556.58� �362.52� �15701.60�

�0.00� �11518.03� �488.37� �27708.00�

PRIVATE �7150.00�

�5557.50� �554.96� �13262.46�

�0.00� �0.00�

�15724.81� �28987.27�

CENTRAL �11890.00� �359.58� �0.00� �12249.58� �2320 �0.00� �0.00� �14569.58�

TOTAL 33822.5 6473.66 917.48 41213.64 2320 11518.03 16213.18 71264.85

% 47.5 9.1 1.3 57.8 3.3 16.2 22.8 100

SOURCE: CEA

TABLE - 2.5

SOUTHERN REGION ANTICIPATED POWER SUPPLY POSITION DURING 2015-16 AS PER LGBR

Peak

Dem

and

(MW

)

Peak

Ava

ilabl

e (M

W)

Peak

Def

icit

/ Su

rplu

s (M

W)

Peak

Def

icit

/ Su

rplu

s (%

)

Ener

gy

Req

uire

men

t (M

U)

Ener

gy

Ava

ilabi

lity

(MU

)

Ener

gy D

efic

it / S

urpl

us

(MU

)

Ener

gy D

efic

it / s

urpl

us (%

)

43,630 35,011 -8,619 -19.8 313,248 277,979 -35,269 -11.3

SOURCE: LGBR report 2015-16



Job No: 15Z03


- 22 -

TABLE - 2.6

ACTUAL POWER SUPPLY POSITION

Peri

od

Peak

Dem

and

(MW

)

Peak

Met

(MW

)

Peak

Def

icit

/ Su

rplu

s (M

W)

Peak

Def

icit

/ Su

rplu

s (%

)

Ener

gy

Req

uire

men

t (M

U)

Ener

gy

Ava

ilabi

lity

(MU

)

Ener

gy D

efic

it /

Surp

lus

(MU

)

Ener

gy D

efic

it /

Surp

lus

(%)

9TH PLAN END

22757 19201 -3556 -15.6 140516 128095 -12421 -8.8

10TH PLAN END

26176 24350 -1826 -7.0 180091 175197 -4894 -2.7

11TH PLAN END

37,599 32,188 -5,411 -14.4 260,302 237,480 -22,822 -8.8

2012-13 38,767 31,586 -7,181 -18.5 281,842 238,058 -43,784 -15.5

2013-14 39,015 36,048 -2,967 -7.6 277,245 258,444 -18,801 -6.8

2014-15 39,094 37,047 -2,047 -5.2 285,797 274,136 -11,661 -4.1 SOURCE: CEA

As per 18th EPS Committee Notes, electrical energy requirement

for Southern region would be 506,589 MU by the end of 13th

Plan period (Table 2.3). Average peak electrical load for

Southern region forecast is 78857 MW by the end 13th Plan. It is

to be noted that as per 18th EPS Committee survey report (Table

2.3) and the currently installed capacity of the southern region

as per Table 2.4, a rapid capacity addition through large scale

thermal power development program is required.

In this scenario, proposed power station of 4000 MW in Tamil

Nadu is assured of steady demand in the region. It is thus

possible to run the proposed station at high PLF



Job No: 15Z03


- 23 -

2.4 POWER SCENARIO IN TAMIL NADU Being located on the South eastern coast of India the total

geographical area of Tamil Nadu covers 3.95% of the total

geographical area of India and houses 7.21 Crore population as

per latest Census. The Per capita consumption of electricity in

Tamilnadu during the year 2011-12 was 1276.57kWh (Source :

CEA POWER SCENARIO STATUS NOTE- SEP 2014). The following

tables show the present power scenario of Tamil Nadu.

TABLE - 2.7

TAMIL NADU INSTALLED CAPACITY (as on 31.01.2016) (FIGURES IN MW)

Sect

or

Thermal N

ucle

ar

HYD

RO

R.E

.S

(MN

RE)

Tota

l

Coa

l

Gas

Die

sel

Tota

l

STATE �4770.00� �524.08� �0.00� �5294.08�

�0.00� �2182.20� �122.70� �7598.98�

PRIVATE �2350.00� �503.10� �411.66� �3264.76�

�0.00� �0.00� �8741.47� �12006.23�

CENTRAL �4155.10� �0.00� �0.00� �4155.10� �986.5 �0.00� �0.00� �5141.60�

TOTAL 11275.1 1027.18 411.66 12713.94 986.5 2182.2 8864.17 24746.81

% 45.6 4.2 1.7 51.4 4.0 8.8 35.8 100

SOURCE: CEA



Job No: 15Z03


- 24 -

TABLE - 2.8

TAMILNADU ANTICIPATED POWER SUPPLY POSITION DURING 2015-16 AS PER LGBR

SOURCE: LGBR report 2015-16

TABLE - 2.9 TAMILNADU ACTUAL POWER SUPPLY POSITION FROM IX PLAN

SOURCE: CEA

Peri

od

Peak

Dem

and

(MW

)

Peak

Ava

ilabl

e (M

W)

Peak

Def

icit

/ Su

rplu

s (M

W)

Peak

Def

icit

/ Su

rplu

s (%

)

Ener

gy

Req

uire

men

t (M

U)

Ener

gy

Ava

ilabi

lity

(MU

)

Ener

gy D

efic

it /

Surp

lus

(MU

)

Ener

gy D

efic

it /

Surp

lus

(%)

2015-16 14,489 13,710 -779 -5.4 102,653 98,123 -4,530 -4.4

Peri

od

Peak

Dem

and

(MW

)

Peak

Met

(MW

)

Peak

Def

icit

/ Sur

plus

(M

W)

Peak

Def

icit

/ Sur

plus

(%)

Ener

gy R

equi

rem

ent (

MU

)

Ener

gy A

vaila

bilit

y (M

U)

Ener

gy D

efic

it / S

urpl

us

(MU

)

Ener

gy D

efic

it / S

urpl

us

(%)

9TH PLAN END 7158 6218 -940 -13.1 46232 42951 -3281 -7.1

10TH PLAN END 8860 8624 -236 -2.7 61499 60445 -1054 -1.7

11TH PLAN END 12,813 10,566 -2,247 -17.5 85,685 76,705 -8,980 -10.5

2012-13 12,736 11,053 -1,683 -13.2 92,302 76,161 -16,141 -17.5

2013-14 13,522 12,492 -1,030 -7.6 93,508 87,980 -5,528 -5.9

2014-15 13,707 13,498 -209 -1.5 95,758 92,750 -3,008 -3.1



Job No: 15Z03


- 25 -

TABLE - 2.10

TAMILNADU PEAK & ENERGY FORCAST

YEAR ENERGY DEMAND (MU) Million Units

PEAK DEMAND (MW)

2016-17 119251 20816 2017-18 129582 22375 2018-19 139949 24057 2019-20 151145 25876 2020-21 163327 27838 2021-22 171718 29975

SOURCE: 18th EPS As per 18th EPS Committee Notes, energy requirement for Tamil

Nadu at the end of 13th Plan period is estimated/forecast as

171718 MU. Peak electric load at the end 13th Plan is

estimated/forecast as 29975 MW. It is to be noted that as per

18th EPS Committee survey report Table 2.10 and the currently

installed capacity of the state as per the Table 2.7 a rapid

capacity addition through large scale thermal power

development program is required.

In view of shortage of power in the state and in order to bridge

the demand-availability gap of power, Tamil Nadu Generation

and Distribution Corporation Limited (TANGEDCO) is exploring

the possibility of establishing more thermal power projects. The

Government of Tamil Nadu in the budget speech for the year

2015-16 had announced that a 5x800MW Kadaladi Supercritical

Thermal Power Project will be established in Ramanathapuram

District.



Job No: 15Z03


- 26 -

2.5 JUSTIFICATION OF THE PROJECT:

With the present and future mismatch between demand and

supply for Indian power scenario, any capacity addition will be

an welcome relief to attain the growth figures projected in

Electricity Power Survey (EPS) as well as to maintain a steady

growth in Gross Domestic Product (GDP).

The diesel or gas turbine plant plays a vital role in the power

industry as the response of these plants to the fluctuating power

is very high and they can be built anywhere. The use of these

plants in India for power generation is limited due to limited

sources of oil and gas in the country which are essential and

required for industrial and transport purposes.

The hydel power stations are subject to the vagaries of weather

and the availability of water and hence assured power supply

from the same cannot be guaranteed throughout the year.

Therefore, total reliance on hydel stations is not advisable.

The nuclear power plants needs stringent safety precautions and

need more sophisticated safeguards to protect the personnel

and environment.



Job No: 15Z03


- 27 -

Wind contains tremendous amount of energy, it can be

harnessed to generate power on a large scale matching with

conventional sources. The total installed wind capacity in India is

23439.26 (31st March, 2015) of which Tamil Nadu with installed

capacity of 7456.98 MW accounts for 31.81 %.

India is ranked number one in terms of solar energy production

per watt installed. Total installed capacity as on 15th Jan, 2016

is 5,130 MW of which Tamil Nadu with installed capacity of 419

MW accounts for 8.16 %. Land is a scarce resource in India and

per capita land availability is low. Dedication of land area for

exclusive installation of solar arrays might have to compete with

other necessities that require land. The amount of land required

for utility-scale solar power plants currently approximately

1 km2 for every 20–60 megawatts (MW) generated could pose a

strain on India's available land resource.

Installation of wind power plant depends on availability of wind

with required wind speed. Very few locations satisfying above

criteria are identified in Tamil Nadu. Further wind based power

plants are operating at very low PLF of 25-30%, hence

dependence on wind based power plant as base load plant is not

feasible.



Job No: 15Z03


- 28 -

In such a situation, it is prudent to implement base load power

plants using coal as fuel and thermal power generation as the

best preferred alternative. The actual growth in industrial,

agricultural and domestic demand will establish that there is an

appreciable shortfall in the installed capacity and energy

availability as on date.

Electricity consumption in Tamil Nadu is increasing at a rate

faster than over all energy supply. Considering the projected

demand at end of 13th year Plan as per 18th Electricity power

survey report Table 2.10 and the currently installed capacity of

the state a per the Table 2.7, a rapid capacity addition through

large scale thermal power development program is planned

during 13th year Plan (2017-2022).

Pulverized Fuel Firing combustion is the most common and well

proven among all the above technologies. PF fired boilers are

most suited for higher capacity power plants and have the

distinct advantage of better combustion efficiency with less

auxiliary consumption as compared to any other technology in

the market today.



Job No: 15Z03


- 29 -

The choice of unit capacity for the coal fired station depends

largely upon considerations of efficiency and adherence to

environmental norms. Increase in steam parameters namely

pressure and temperature lead to increase in efficiency, which in

turn, reduces emission of greenhouse gases. Increase in steam

pressure beyond 221 bar leads to supercritical conditions in the

thermodynamic steam water cycle and results in sizeable

efficiency improvement. While supercritical steam parameters

have been more effective in capacity range of 600 MW and

above. Any unit size from 660 MW to 800 MW of gross capacity

at generator terminal having supercritical technology for the

proposed plant can be considered. However, keeping in view the

higher efficiency, improve heat rate, low per MW cost, Lower

emission of CO2, SOx & SPM and in current scenario unit

capacity of 800MW Supercritical technology is being widely

adopted throughout India and henceforth the selection of

800MW unit capacity is justified for this proposed project.

This shortfall will continue even after the commissioning of the

proposed power plants in various parts of the state and in the

southern regions. As Tamil Nadu state is the most preferred

state for industrialization, the industrial demand for power will



Job No: 15Z03


- 30 -

be ever increasing. Adding to the industrial demand the

agriculture need as well as domestic consumption coupled with

the improved standard of living of the population will be on the

rise. The location being close to the sea, cooling water is

perennially available in the site for the power plant. Imported

coal is being considered as the main fuel for the proposed power

plant. Further the grid is large enough to accommodate this

proposed 5x800MW coal fired power plant.

Besides Kadaladi Taluk in Ramanathapuram District is a very

backward area and prone to communal disturbances, a power

plant of this 5X800 MW capacity will bring in lot of employment

opportunities both direct and indirect and will pave away for

communal harmony in this area. Taking all these into

consideration, establishment of the proposed power project of

5x800 MW is justified in all aspects.

�



Job No: 15Z03

5x800 MW-KSCTPP-FR-TANGEDCO SEC - 3

SE/E/TH(P)/EE/E/KDI/F.DPR/P.O.NO.3/D.3/2016 -31-

BASIC REQUIREMENTS 3.1 INTRODUCTION: The basic requirements for setting up and operating a 5x800MW

coal based thermal power station are -

� Availability of adequate land suitable for setting up the station

� Availability of adequate quantity of water throughout the year

� Guaranteed supply of fuel with effective transportation system to ensure optimum cost of fuel at the plant

� Power evacuation possibility to the identified sub-station(s) of the grid at appropriate voltage level(s).

� Accessibility to the site for start of construction, availability of construction water and power, availability of construction manpower, road connection to airport, seaport, etc.

� Connectivity to population centres with social and civic amenities

This section discusses the requirements vis-à-vis the availability

above basic elements of setting up the proposed power station.

TANGEDCO had identified few potential sites and the proposed

site has been considered for setting up of the Project after

review and consideration of above stated aspects.



Job No: 15Z03



3.2 LAND - REQUIREMENT & AVAILABILITY: The land requirement for a coal based thermal power project

can broadly be classified under the following five major heads: -

a. Main Plant Area

b. Area required for Roads, Railway siding, Coal stack yard,

pipe corridors, cooling tower, switch yard, Administrative

Building, etc.

c. Ash Disposal Area

d. Other land area requirements for infrastructure facilities

such as land for sea water intake & outfall piping corridor,

power evacuation corridor, environmental requirements, lay

down area etc.

e. Green belt

Depending on the site features, land configuration and related

technical requirements, the tentative break-up of land

requirements for a typical 5x800MW imported coal fired power

plant with provisions of development of relevant infrastructure

and support facilities, may be considered as follows:-



Job No: 15Z03



LAND REQUIREMENT AREA IN ACRES MAIN PLANT AREA BTG FOR FIVE (5) UNITS 56 ELECTRICAL AREA (TRANSFORMER YARD,SWITCHYARD & CONTROL ROOM) 102

COAL HANDLING PLANT INCLUDING MGR & FUEL OIL AREA 149

ASH HANDLING PLANT, FGD & MILL REJECT SYSTEM 71

PLANT WATER SYSTEM, WASTE WATER SYSTEM AND CW CORRIDOR 144

AUXILLARY BUILDINGS, PLANT FACILITIES AND ROADS 148

ASH POND AREA 522 GREEN BELT 300 TOWNSHIP 150 Total Land Requirement, Acres 1642

PLANT AREA: The above land requirement envisaged for the power plant

considers installation of 5x800 MW capacity imported coal based

thermal power station with relevant facilities. The estimated

space requirement considers a sea water storage, cooling

towers, coal receipt by rail route, coal storage and handling

facility, fuel oil system, 765 kV GIS switchyard, sea water

treatment facilities, desalination plant to meet consumptive

water requirement, Flue gas desulphurisation plant, green belt

to satisfy State PCB/MOEF norms, etc.



Job No: 15Z03



ASH DISPOSAL AREA: About 4.05 MTPA of ash (considering Worst coal 50% imported:

50% indigenous & at 85% PLF) is likely to be generated in a

year from the proposed power station. An average ash dump

height of 15M is envisaged for estimation of land requirement

for ash dump yard/ash pond. Actual height will, however,

depend on ground condition of dump and its contour. The ash

disposal area is decided considering Bottom ash slurry disposal

for 25 years and fly ash disposal in slurry form in the 1st year-

100%, 2nd year-75%, 3rd year-50% and 4th year-25%. This area

includes the peripheral road and statutory green belt around the

disposal area. As per the Ministry of Environment & Forests

notification dated 3rd November, 2009, 100% fly ash utilisation

from the complex need to be ensured within initial four years of

operation. Thus the land requirement works out to about 522

Acres for fly ash disposal for initial years and 25 years for bottom

ash. It would consider disposal with a dump height of 15m.

OTHER AREA:

The site for the proposed power plant is planned on a plot of

land with no habitation. The site was identified on the basis of

following criteria:-

� Availability of adequate land for locating the power plant with minimum resettlement and rehabilitation issues.

� Land is predominantly flat. However, certain amount of

land filling and cutting would be necessary.



Job No: 15Z03



� Assured availability of sea water from the Gulf of Mannar located within 2.3 km.

� The proposed site is on the Northern side of East Coast Road (ECR) connecting Ramanathapuram and Vembar. Imported coal will be transported from the overseas supplier (Indonesia or any other country) and indigenous coal from Odisha by sea to Thoothukudi Port and then by the rail Thoothukudi Port.

� Hence the Site is well connected by road/Sea/Rail fortransportation of fuel, construction material, equipment etc., will not be a problem.

� Power generated in the Power Plant would be available at 765 kV level in the station switchyard bus. Power from this switchyard would be evacuated through two (2) 765 kV double circuit lines to the nearest 765 kV pooling station, location to be decided by TANTRANSCO the local STU.

The vicinity map of the area identified is given in Drawing

No.15Z03-004-DWG-M-001. The site location map of area is

given in Drawing No.15Z03-004-DWG-M-002. It may be

seen that the land available is suitable for locating the proposed

power plant with all the auxiliaries and accessories. In the

subsequent section, details of the identified site are discussed in

adequate details. The estimated space requirement considers

closed circulating cooling water system with cooling towers, Rail

way line, Coal storage and handling facility, fuel oil system, 765

kV switchyard, desalination plant to meet consumptive water

requirement, Flue gas desulphurisation (FGD) plant, green belt

to satisfy TNPCB/MOEF norms, etc..



Job No: 15Z03



Township: Residential accommodation with necessary civic amenities would

be provided for the O &M personnel of the proposed station in a

separate plot of land outside plant boundary to be located nearer

to the project area. The area would include civic amenities

required for such township located at a remote location. The plot

needs to be adequate for provision of green verge. Total area to

be identified outside plant boundary for township is 150 acres.

Water Corridor

Seawater would be directly used for condenser cooling and the

fresh water requirements would be met by installation of a

desalination plant. The sea coastal line is at aerial distance of

around 2.3 km on the Southern side of the proposed project. The

intake well along with intake pump house to be located offshore in

Gulf of Mannar. Two intake sea water pipes from the intake pump

house in off shore to the plant site is planned to cater to the water

requirement for the station and two outfall line. Considering the

submergence requirement for the pumps, Intake Pump House to

be located at a depth of about 5 m (tentative) will be suitable.

The Intake structure shall be suitably designed with necessary

Trash Racks and Stop Logs. This arrangement minimizes

occurrence of silt carry over to the Plant.The outfall to be located

around 1.5 km (approx.) into the sea away from the intake point.

Intake and Outfall pipelines are proposed to be laid over pile

supported RCC deck. A common RCC deck (15 m width) will be

provided for both intake and outfall pipes for about 4 km

(tentative) and separate RCC deck shall be laid beyond this point



Job No: 15Z03



for outfall about 1.5 km (tentative). For laying water pipeline of

route length of about 2.3 km and the pipeline corridor of width

20 m from sea shore to plant boundary, the land shall be

identified. The tentative location is indicated in the Drawing

No.15Z03-004-DWG-M-003 (sheet 2 of 2). However, the location

of the intake and outfall is to be finalised based on the Marine

EIA/EMP study & the intake and outfall Modelling study.

3.3 Water Requirement: In a conventional fossil fuel-fired thermal power station, water is

used to meet the following consumptive requirements.

a. Cooling water for steam condenser to act as the heat sink for

the thermodynamic cycle. However, for power stations

employing semi-open recirculating cooling systems with

cooling towers, only a small percentage of total circulating

water flow is required as make-up. The cooling water system

in a large sized thermal power plant is the largest consumer

of water and its make-up requirement itself accounts for more

than 70% of the total consumptive water requirement of the

power station.

b. Cooling of electrical and mechanical auxiliary equipment, such

as, generators, transformers, large motors, compressors and

other heat exchangers shall be through closed circuit auxiliary

cooling system using demineralised water as the primary



Job No: 15Z03



coolant and main circulating cooling water as the secondary

coolant.

c. Make-up water requirement for power cycle (boiler make-up).

d. Water for miscellaneous services such as:-

i) Fire fighting system

ii) General services viz. airconditioning, ventilation, service water, dust suppression, dust extraction, FGD etc.

iii) Potable water for plant and township.

Water required for the station would be drawn from Gulf of

mannar.

The estimated consumptive water requirement based on sea

water analysis shown in Annexure-3.1 for the 5x800 MW

capacity station is at 39193 m3/hr (7839 m3/hr per unit) (~385

cusecs). The break-up of the estimate is given in Annexure-

3.2. The estimates are based on adoption of cycle of

concentration (COC) in the circulating cooling water circuit as

1.3.

3.4 Fuel Requirement:

The proposed site is on the Northern side of East Coast Road

(ECR) connecting Ramanathapuram and Vembar. Imported coal

will be transported from the overseas supplier (Indonesia or any

other country) or indigenous coal from Odisha will be

transported to Thoothukudi Port by ship.



Job No: 15Z03



For Coal connectivity a combination of existing Rail network,

proposed new B.G line project and private railway line to the

power plant is proposed.The coal from Thoothukudi port will be

transported to site by one of the following rail route.

i. OPTION I - Utilizing the proposed new alignment of B.G railway line from Kanyakumari to Karaikudi via Ramanathapuram. (Status of the new alignment - decision is awaited from Railway Board) Coal will be transported by the existing railway line from Thoothukudi Port to Milavittan, then through the proposed B.G railway line which aligns along the southern side of the proposed site and then by private railway line take-off from a location nearer to the Power Plant.

Or

ii. OPTION II - Utilizing the proposed new alignment of B.G railway line from Thoothukudi to Madurai via Melamarudur. (Status of the new alignment - sanctioned by Railway Board) Coal will be transported by the existing railway line from Thoothukudi Port to Milavittan, then through the proposed new alignment of B.G railway line to Melamarudur. From Melamarudur to the power plant private railway line is proposed.

The coal analysis for imported coal & Indigenous Coal is given in

Annexure-3.3.



Job No: 15Z03



On the basis of Best coal (Imported Coal 100%) the estimated

coal requirement would be as below :

On the basis of Design coal (Imported Coal 70% : Indigenous

coal 30%) the estimated coal requirement would be as below:

On the basis of Worst coal (Imported Coal 50% : Indigenous coal

50%) the estimated coal requirement would be as below:

Fuel Particulars 5 x 800 MW Per unit

TG Heat Rate 1850 kCal/kWh - Boiler Efficiency 89% - Station Heat Rate @ MCR with margin 2173 kCal/kWh - Hourly coal requirement at MCR 1541TPH 308 TPH Daily coal requirement @ MCR 36974TPD 7394 TPD Annual Coal requirement @ 85% PLF 11.47 MTPA 2.3 MTPA

Fuel Particulars 5 x 800 MW Per unit

TG Heat Rate 1850 kCal/kWh - Boiler Efficiency 88.1% - Station Heat Rate @ MCR with margin 2195 kCal/kWh - Hourly coal requirement at MCR 1833 TPH 367 TPH Daily coal requirement @ MCR 44000 TPD 8798 TPD Annual Coal requirement @ 85% PLF 13.65 MTPA 2.73 MTPA

Fuel Particulars 5 x 800 MW Per unit TG Heat Rate 1850 kCal/kWh - Boiler Efficiency 87.5% - Station Heat Rate @ MCR with margin 2209 kCal/kWh - Hourly coal requirement at MCR 2093 TPH 419 TPH Daily coal requirement @ MCR 50240 TPD 10048 TPD Annual Coal requirement @ 85% PLF 15.59 MTPA 3.11 MTPA



Job No: 15Z03



Total traffic for coal (Worst Coal) would be between 14-17

rakes/day as per Table given below. A coal stock for about Thirty

(30) days requirement is considered. Imported coal and

Indigenous coal will be transported by Rail through BOBRN type

wagons.

Description Details BOBRNPermissible Carrying Capacity tonnes 62 Cubic capacity of Wagon Cu.m 57.2 Wagons per rake wagons 59 Net tonnes per rake tonnes 3658 Quantity in tonnes per annum (Worst coal 100% PLF)

million Tonnes

18.4

Rakes per year rakes 5030 Rakes per day, on an average rakes 14 Additional 25% rakes 17

Auxiliary fuel for boiler start-up and flame stabilization of the

units will be LDO/HSD and HFO. For the purpose of this report a

specific auxiliary fuel consumption of 1 ml/kWh is considered.

The actual consumption will, however, depend on average daily

plant load factor, grid stability, quality of coal etc. High plant load

factor can be ensured for the proposed power station and thus,

fuel oil consumption can be largely optimized. Fuel oil is planned

to be transported to the power plant by road and stored in tanks.



Job No: 15Z03



3.5 Power Evacuation: Power generated by the power station shall be stepped up to

765 kV level through three single phase 315 MVA Generator

Step-up Transformers (GT) for each unit. Power generated in the

generator at terminal voltage of 27KV (depend on generator

manufacturer) would be stepped up to 765 kV level by

Generator transformer and shall be available in the station

switchyard bus. Power from the switchyard would be evacuated

through two (2) 765 kV double circuit lines to the nearest

765 kV pooling station, location to be decided by TANTRANSCO

the local STU.

3.6 Other Infrastructural Requirements:

For a grass root station, availability of infrastructural facilities is

essential for successful implementation of the project in a

compact time frame. The facilities which are considered

essential during early stage of construction are:

a. Access roads

b. Railway siding.

c. Housing facility for the construction staff with supply of

water and electricity, community facilities viz. market,

housing, school, water works, construction power, health

care etc.

d. Construction material & critical construction equipments

e. Skilled and unskilled manpower

f. Telecommunication facility.



Job No: 15Z03



Among the above infrastructural facilities, a two-lane access

road of heavy duty class emanating from the ECR connecting

Ramanathapuram and Vembar is available. Nearest city,

Thoothukudi is having infra-structural facilities useful for the

proposed power project which is 55 Km from the proposed site.

The nearest Domestic airport at Thoothukudi (55 km approx.)

/International airport at Madurai (120kms approx.). Long body

trailers can be employed for haulage of heavy equipments from

port to the plant site. During construction heavy material has to

be transported by rail and some by road.

It is envisaged that about 10 MVA construction power may be

required at 415V level when construction activities takes place

simultaneously in all units and station areas of the plant.

TANGEDCO shall provide two single circuit 33 kV overhead lines

from KADALADI 110KV/33KV SS up to construction site for

construction power requirement.

At construction site suitable 33/11KV substation with 11KV/415V

distribution network with transformers and Distribution board

shall be provided to cater the construction power requirement at

different locations.

Further the Project Proponent shall be instructed to arrange

their own emergency DG sets to continue the construction

activity during grid failure.



Job No: 15Z03



To accommodate personnel of owner, Project Proponent etc.

during construction of the project, it is envisaged that some

housing facilities such as guest house, bachelor's hostel,

residential quarters etc. may have to be developed along with

some basic civic amenities.

�



Job No: 15Z03


SE/E/TH(P)/EE/E/KDI/F.DPR/P.O.NO.3/D.3/2016 - 45 -

SITE FEATURES

4.1 Introduction:

To ensure efficient and trouble free operation of a thermal

power plant throughout the operating life, selection of a proper

site with required features, infrastructure and inputs, is always

the key factor to optimize on design and cost parameters

involved. Integration of the technological equipment and

systems with the specific features of the project location is

viewed as an important aspect for the site under consideration.

A selected site may not always provide the ideal conditions.

Engineering solutions are usually possible which can still ensure

well designed and operable plants, provided the selected site

meets the basic requirements. Again fulfillment of statutory

requirements in terms of geographical features, MOE&F norms

and priority in land use are the basic criteria for selecting site for

thermal power station using fossil fuels. TAMIL NADU

GENERATION AND DISTRIBUTION CORPORATION

LIMITED (TANGEDCO) has carried out an extensive study to

identify suitable locations for setting-up the proposed Thermal

Power Plant. TANGEDCO had identified few potential sites in

Kadaladi taluk along the Gulf of Mannar for setting up the

Project. Land in Kondunallampatti, Tharaikkudi,

Kannirajapuram, Narippaiyur, Valinokkam and Siraikkulam

villages of Kadaladi Taluk, Ramanathapuram District were

identified.



Job No: 15Z03



4.2 Justification & Discussion on Selected Site

The three potential site details are as given below: The

appropriate site is selected based on economic consideration

and having minimum impacts on ecology & environment

Comparative Details of Sites considered for the proposed project:

SL.

No.PARAMETERS SITE-A SITE-B SITE-C

1 Land Available (Hectares)

803.86.5 902.36 829.93

2 No. of Villages 1 3 2 Name of village Kondunallam

pattiTharaikkudi, Kannirajapuram, Narippaiyur

Valinokkam, Siraikkulam

3Orientation of the land

Marginally irregular boundary

Compact in nature

Irregular boundary

4

Land type Agricultural land

Barren land with scrubs and Palm trees

Barren land with scattered scrubs and marginal agricultural land

5

Suitability of Land

Suitable, leveled area

Suitable, fairly levelled with minimum undulation

Suitable, fairly levelled with minimum undulation

6Distance (aerial) from Sea coast line

8 km 2.3 km 0.7 km



Job No: 15Z03



SL.


7

Distance (aerial) from 500m HTL

7.5km 1.8 km Project Southernboundaryoverlaps

8

Intake/outfallcorridor over land

To be routed along the site B with overall approx length of 10 km

Approxroute length of 2.3 km

Approxroute length of 1 km

9

Location with respect to District Boundary

Lined along Thoothukudidistrict boundary.

Around 2 km from the Thoothukudi district boundary

Center of Ramanatha-puramdistrict.

10 R&R issue Thinly populated No habitation

Thinly populated

11Coal Transport Thoothukudi port

then by rail Thoothukudi port then by rail

Thoothukudiport then by rail

Infrastructural facilities

12

Road access 2.5 km from Sevalpatti-Tharakudi district road

1km from ECR

2km from ECR

13

Airport access Nearest airport Domestic/International Thoothukudi 70 km / Madurai 100 km

Nearest airport Domestic/InternationalThoothukudi 55 km/ Madurai 120 km

Nearest airport Domestic/International Thoothukudi110 km / Madurai 121 km



Job No: 15Z03



SL.


14

Railway access Thoothukudi -49km Ramanathapuram-80km

Thoothukudi-55kmRamanathapuram-65km

Thoothukudi -85kmRamanathapuram-41km

15Port access Nearest port

Thoothukudi 66 km

Nearest port Thoothukudi 75 km

Nearest port Thoothukudi 105 km

16Ecological sensitivelocations

GOMBR (Gulf of Mannar Biosphere Reserve)

Part of site falls in the buffer area

Site is within the buffer area

Site is within the buffer area

GOMNP (Gulf of Mannar National Park) Core area

Site is 21 km from Kariashuli Tivu and 19 km from Uppu Tanni Tivu

Site is 23 km from Kariashuli Tivu and 11 km from Uppu Tanni Tivu

Site is 12km from Nalla Tanni Tivu and 5.5 km from Anaipar Tivu

Melselvanoor – Keelselvanoorbird sanctuary

Aerial Distance of 24 km



Chitrangudi bird sanctuary




KanjirankulamBird sanctuary






Job No: 15Z03



Site-A:

Located in Kondunallampatti, the site is about 80 km from

Ramanathapuram. Within the vicinity of 10 km range the above

listed sanctuary and national park are not located. However, part

of site falls within the buffer area of GOMBR. This site was not

considered further for:

a) The intake corridor over land to be taken along site-B and the

distance works out to around 10km.

b) The site has maximum agricultural land.

c) The site has few habitats which are likely to cause R&R issues.

Site-C: Located in Valinokkam and Siraikkulam about 40 km from

Ramanathapuram. This site was not considered for:

a) The project site and the intake will be around 5.5 km from the

Anaipar Tivu.

b) The Intake/outfall location with respect to the site location will

be in close proximity with the GOMNP.

c) The project site southern part overlaps with 500m HTL.

d) The site has some agricultural land and habitat which may

cause R&R issues.

Site-B:

Located in Tharaikkudi, Kannirajapuram and Narippaiyur about

65 km from Ramanathapuram. The site falls within the buffer

area of GOMBR. Further assessment on environmental impacts

and the requisite management plans shall be pointed out in

EIA/EMP study.



Job No: 15Z03



From the above mentioned three (3) sites, Site-B is selected due

to the following intrinsic merits:

a. Project area is spread over 3 villages and the orientation is compact in nature.

b. Non Agricultural land.

c. NO R&R issue as there is no habitation.

d. Land is mostly barren partly with patches of bushes and

partly with palm trees.

e. As the site identified is near sea shore, the requirements for

plant water system could be easily met out. However, it is

also reasonably away from the sea coast in compliance with

coastal Zone Regulations.

f. The site is near the proposed alignment of B.G. Railway line

from Kanyakumari to Karaikudi and hence it will facilitate

transport of coal from Thoothukudi port to site.

g. The site is 1KM away from the existing East coast road

h. Closeness to the sea (i.e) about 2.3Km

The vicinity map and site location map of the area identified for

putting up the station are shown in Drawing Nos.15Z03-004-

DWG-M-001 and 15Z03-004-DWG-M-002 enclosed. In

Annexure-4.1 of this report, Land area details of Sites A, B & C

are given in brief.



Job No: 15Z03



4.3 Feasibility Consideration

LAND FEATURES:

LAND AVAILABILITY:

Total land area required for the Thermal Power Plant is about

902.36 Ha. Land has been identified in Tharaikkudi,

Kannirajapuram and Narippaiyur villages of Kadaladi Taluk,

Ramanathapuram District. The land area for the Proposed Power

Plant comprises of both private and Government lands. There is

no habitation in the proposed Power Plant site, hence no

rehabilitation issues.

Plot Plan of the proposed Thermal Power Plant is shown in

Drawing No. 15Z03-004-DWG-M- 003.

ACCESSIBILITY:

The proposed site is on the western side of ECR connecting

Ramanathapuram and Vembar. Also The site is near the

proposed alignment of B.G. Railway line from Kanyakumari to

Karaikudi and hence it will facilitate transport of coal from

Thoothukudi port to site. The nearest city/town Thoothukudi at a

distance of about 55 km and Ramanathapuram at a distance of

about 65 km. The nearest port is Thoothukudi at a distance of

75 km for the site.



Job No: 15Z03



FUEL SOURCE & TRANSPORTATION:

Coal, the main fuel for the proposed Thermal Power Plant is

envisaged to be imported from Indonesia or any other country

to the nearest port Thoothukudi which is 75 km from the

proposed site and from there it will be transported to the project

site. For Coal connectivity a combination of existing Rail

network, proposed new B.G line project and private railway line

to the power plant is proposed.The coal from Thoothukudi port

will be transported to site by one of the following rail route.

i. OPTION I - Utilizing the proposed new alignment of B.G

railway line from Kanyakumari to Karaikudi via

Ramanathapuram.

Coal will be transported by the existing railway line from

Thoothukudi Port to Milavittan, then through the

proposed B.G railway line which aligns along the

southern side of the proposed site and then by private

railway line take-off from a location nearer to the Power

Plant.

Or

ii. OPTION II - Utilizing the proposed new alignment of B.G

railway line from Thoothukudi to Madurai via

Melamarudur.

Coal will be transported by the existing railway line from

Thoothukudi Port to Milavittan, then through the

proposed new alignment of B.G railway line to

Melamarudrur. From Melamarudur to the power plant

private railway line is proposed.



Job No: 15Z03



Details of the Approximate Rail route distance for Coal

connectivity are as given below:

SL.

NO.

DESCRIPTION OPTION I OPTION II

1 Through Existing route from Thoothukudi port to Milavittan

Route length 11 km

Route length 11 km

2 Through the Proposed new B.G line project

The proposed B.G linealigns along thesouthern side of theproposed plant siteconnecting Milavittanto Ramanathapuram. Approx route lengthof 50 km to beutilised in theproposed B.G line.

Milavittan to Melamarudur Approx route length of 14 kmto be utilised in the proposed B.G line.

3 Private railway siding Take-off from the proposed BG line

Approx. route length from take- off point to site 4 km

Approx. route length from take-off point (at Milamarudur) to site 40km

4 Approx. Total route length for coal connectivity

65km 65km

5 Status of proposed BG line Project

Decision is awaited from Railway Board

The proposed alignment has been sanctioned by Railway Board

The Coal connectivity details for the site identified for putting up

the station in shown in Drawing Nos.15Z03-004-DWG-M-

008 - Coal connectivity Rail route map.



Job No: 15Z03



WATER SOURCE & CONVEYANCE:

The consumptive water required for the Power Plant is proposed

to be drawn from Gulf of Mannar, the coastal line is at aerial

distance of around 2.3 km on the Southern side of the proposed

project. Sea water intake pump house will be located off shore

and sea water will be pumped to the proposed site through pipe

lines over RCC deck. The sea water will be used for condenser

cooling and portion of it will be desalinated and used for other

purpose. The blow down water from cooling tower and

desalination rejects will be discharged back to the Gulf of

Mannar. Considering the submergence requirement for the

pumps, Intake Pump House to be located at a depth of about 5

m (tentative) will be suitable. Intake and Outfall are proposed to

be laid over pile supported RCC deck. A common RCC deck (15

m width) will be provided for both intake and outfall for about 4

km (tentative) and separate RCC deck shall be laid beyond this

point for outfall about 1.5 km (tentative). The tentative location

is indicated in the Drawing No.15Z03-004-DWG-M-003

(sheet 2of2). However, the location of the intake and outfall to

be finalised based on the Marine EIA/EMP study & the intake and

outfall Modelling study.

POWER EVACUATION:

Power generated in the Power Plant would be available at

765 kV level and Power from this switchyard would be

evacuated through two (2) 765 kV double circuit lines to the



Job No: 15Z03



nearest 765 kV pooling station, location to be decided by

TANTRANSCO the local STU.

ENVIRONMENTAL ASPECT:

The Gulf of Mannar is a large bay in the Indian Ocean that lies

along the south-eastern tip of Tamil Nadu extending from

Rameswaram in the north to Kanniyakumari in the south. The

Gulf of Mannar Biosphere Reserve was set up in 1989 jointly by

the Government of India and the Government of Tamil Nadu

with a view of protecting marine wildlife and coastal ecosystems

that inhabit the 10,500 square kilometers of the reserve. The

Gulf of Mannar Marine National Park is a protected area, which

is part of the Biosphere Reserve that extends from

Rameswaram to Thoothukudi. It consists of 21 small islands

varying in size from about 0.5 hectares to 125 hectares and

adjacent coral reefs spread over an area of 560 square

kilometers. (source: State Environment report of Tamil Nadu

JAN-2016)

The Kadaladi Talk in Ramanathapuram district is a economically

backward district without any major industries and prone to

communal disturbances, a power plant of this 5X800 MW

capacity will bring in lot of employment opportunities both direct

and indirect and will pave away for communal harmony in this

area. The effect of the proposed project on environment should

be seen in the broader perspective of overall impact on the

neighbourhood. The proposed plant site is basically non-

agriculture in nature. The site area is free of any forest land and



Job No: 15Z03



there is no historical monument within the vicinity. The plant

layout has been prepared keeping in view the CRZ

requirements. Three Bird sanctuaries are located in the vicinity

Melselvanur-Keelselvanur bird sanctuary at around 17 km,

Chitrangudi bird sanctuary and Kanjirankulam bird sanctuary at

around 22 km & 20 km respectively from the selected site (Site-

B). The GOMNP (Gulf of Mannar National park) Vembar zone

Uppu Tanni Tivu is around 11 km and Thoothukudi zone

Kariashuli Tivu is around 23 km from the selected project site.

The site falls within the buffer area of the GOMBR (Gulf of

Mannar Biosphere Reserve). Further assessment on

environmental impacts and the requisite management plans

shall be pointed out in EIA/EMP study separately. The tentative

location of intake / outfall location is around 12 km and 19 km

away from the Uppu Tanni Tivu and Kariashuli Tivu respectively

in Gulf of Mannar.

�



Job No: 15Z03



TECHNICAL FEATURES 5.1 Introduction

Tamil Nadu Generation and Distribution Corporation

Limited. (TANGEDCO) is planning to set up a coal based 5 x

800 MW capacity power project near Ramanathapuram in the

State of Tamil Nadu. The proposal is mooted to deploy the

state-of-the-art technology using supercritical steam parameters

The basic plant design would consider unitised concept as far as

possible. Judicious provisions would be considered for

reasonable spare capacities in various systems and system

components and interchangeability of equipment/system. State-

of-the-art technology has been considered for design of the

proposed project.

5.2 Thermodynamic Cycle

The fuel considered for the project is coal from the mines in

Indonesia to be transported through Sea cum Rail. The

thermodynamic cycle will consist of the supercritical Boiler, the

Steam Turbine, the condenser, the condensate extraction and

boiler feed systems, the condensate and feed water heaters

along with all other necessary equipment for single reheat

regenerative feed heating system.



Job No: 15Z03



A single reheat steam cycle with regenerative feed heating

system is proposed for the project. The typical heat balance for

such cycles based on the parameter proposed for the Turbine

inlet steam have been presented in Drawing No.15Z03-005-

DWG-M-004. Heat Balance Diagram is based on ‘zero’ make-

up, 32.5 ºC condenser cooling water inlet temperature with

condenser back pressure of 77mm of Hg.

As shown in the scheme and heat balance diagram, the main

steam from the boiler, after expansion through the HP turbine,

would be sent back to the boiler for re-heating. The reheated

steam, after expansion through the double flow IP turbine and

then through two double flow LP casing would be exhausted into

the main condenser. The exhaust steam from the LP turbine

would be condensed by circulation of cooling water. Vacuum

would be maintained in the condenser by 2x100% (1W+1S)

capacity vacuum pumps. The LP feed heating system would

consist of three(3) to four(4) stages of low pressure heaters,

one(1) gland steam condenser, one(1) drain cooler for the low

pressure heater, drain flash and one(1) deaerator. HP feed

heating system will consist of two(2) 50% parallel trains of high-

pressure heaters. However, number of heaters varies from

manufacturer to manufacturer. The condensate from the hot

well would be extracted by 3x50% capacity condensate

extraction pumps (2 working + 1 standby) and pumped to the

deaerator through Condensate polishing unit to gland steam

condenser, drain cooler and the LP heaters. The feed water after

being de-aerated in the deaerator would be pumped to the

boiler through the high-pressure heaters. Provision would be



Job No: 15Z03



kept for dosing hydrazine solution in the condensate extraction

pump discharge and in deaerator feed tank or boiler feed

suction line for oxygen scavenging and pH control of the feed

condensate steam cycle. For the unit 2x50% turbine driven &

1x50% motor driven BFP with booster pump mounted on

common shaft is envisaged. Normally the steam-driven pumps

would be in operation. The boiler feed pumps would be

provided with lube oil system, automatic leak off and minimum

flow re-circulation valves. Motor-driven BFW pump would be

provided with modulating variable speed hydraulic coupling.

Condensate drain from the HP heaters would be cascaded to the

deaerator feed storage tank and the condensate drains from the

LP heaters would be cascaded to the condenser through the

drain cooler.

The auxiliary steam for the proposed power station would be

divided into two sub-systems, One Boiler Auxiliary Steam (BAS)

and other Turbine Auxiliary Steam (TAS). Both BAS & TAS

would receive steam supply from CRH inlet and Outlet line of

SH. The auxiliary steam supply system of the unit would supply

steam to the deaerators, turbine gland sealing system during

light load and start-up conditions. Auxiliary steam will also be

supplied for soot blowing, atomisation system etc.

Auxiliary Boiler of suitable rating shall be provided in case the

BTG supplier requires auxiliary steam for cold start-up of the

unit.



Job No: 15Z03



The units will also be provided with HP and LP Turbine bypass

system for quick start and large load rejections. The turbine

generator units would be so designed that these will be capable

of cyclic duty and frequent start-ups and shutdowns during the

lifetime. The salient features and parameters of major

equipment of the 800 MW sets are furnished hereinafter. The

details of the units may vary to some extent as per vendors’

standard product. The basis of technical parameters of the main

plant and auxiliary equipment for the 5 x 800 MW thermal

power plant are discussed hereunder which describes the

general requirements but is not intended to be exhaustive.

5.3 Main Plant & Equipment

Turbine Generator Unit :

The turbine component and its auxiliaries would be designed and

selected to meet the stringent requirements in respect of

superior thermal performance, excellent product reliability and

operational flexibility. The area provided for the power house is

12.6 acres.

The turbine manufacturer will have turbine designed based on

modular design approach that divides the turbine into three

main parts:

� High-Pressure (HP) section,

� Intermediate-Pressure (IP) section and

� Low-Pressure (LP) section.

The proposed turbine will have one HP, one IP (double flow) and

two double-flow low-pressure casings. All components will be



Job No: 15Z03



selected based on long-proven records and standardized

modules. The turbines will be of the tandem compound design.

The individual shafts of the cylinders and the generator rotor

shaft will be coupled rigidly together and all the shafts will be

machined from single forgings. The turbo-generator set would

be designed for a maximum throttle steam flow at turbine Valve

Wide Open (VWO) condition of 105% of Turbine Maximum

Continuous Rating (MCR) flow. Brief technical features of major

systems and equipment is given in Annexure-5.1.

The HP turbine will be designed with single flow. This will have a

double-shell casing consisting of inner casing carrier and barrel-

type outer casing. Main steam to the HP turbine will be supplied

through two(2) combined stop and control valves.

The IP-turbine will be designed with double flow. This will have a

double-shelled casing with horizontally split inner and outer

casing. Reheat steam will be admitted through two(2) combined

stop and control valves of the turbine. The valves will be

arranged on either side of IP casing. The steam flows to the LP

Turbine through a cross-around pipe.

The LP-turbine will comprise horizontally split multi shell casing.

The outer casing will consist of two end walls, a bracing system,

the top half and the sidewalls. The inner casing will be double

shell axially split supported by support arms that are bolted to it

and that rests on the bracket supports of the bearing pedestals.

The bearing pedestals will be mounted on the foundation. They



Job No: 15Z03



will carry the shaft seal casings, which shall be joined to the

outer casing by means of expansion joints.

A fully automatic gland sealing steam supply system will be

provided for the TG Set and the turbine driven BFPs. HP & IP

turbine shaft glands will be sealed to prevent escape of steam

into the atmosphere and the LP turbine glands will be sealed for

preventing leakage of atmospheric air into the turbine. Steam

will be used for sealing these spring backed labyrinth glands.

During start-up and low loads (say 40% load), seal steam will be

supplied to the turbine glands from the auxiliary steam header

or cold reheat line through a seal steam-regulating valve.

During normal operation (above 40% load), the HP and IP

turbines will be of self-sealing type and under that condition the

auxiliary/CRH steam source will be cut off and the leak-off

steam from HP and IP glands will be used for sealing the LP

glands. The excess leak-off steam shall be led to the condenser.

A gland steam condenser will be provided to condense and

return to the cycle, all gland leaks off steam including that from

BFP turbines. A desuperheating type bypass will be provided

during outage of gland steam condenser. 2x100% capacity

vapour exhausters will be provided to remove non-condensable

gases from the gland steam condenser. The exhaust gases will

be led over the TG hall roof level.

The turbine will have throttle or nozzle controlled type

governing. The steam turbine generator unit will be equipped



Job No: 15Z03



with an electro-hydraulic governing system backed up by 100%

mechanical-hydraulic or electro-hydraulic control system.

HP–LP Bypass Station will comprise 60% (BMCR) HP and LP

Turbine bypass station to act not only as a protection to the

turbine during pressure rise resulting from sudden load throw-

off but also to enable operation of the unit at loads lower than

the control load. Further HP/LP bypass will permit quick,

repeated hot starts of the unit on its tripping.

The LP bypass station will be connected to the hot reheat line

and discharge the steam into the condenser. The hot reheat

steam will be de-superheated by means of condensate injection.

The bypass system shall be in operation when the steam turbine

is not able to receive the entire steam quantity, e.g. during

start-up or in case of a load rejection. The HP and LP bypass

stations will be capable of meeting the following requirements:

� Quick start up of the steam generator from cold, warm & hot conditions.

� Parallel operation of the bypass with turbine under large load throw-off.

� House load operation followed by large load throw-off.

� To keep the steam generator in operation so as to avoid a trip out of the steam generator following full load rejection.

Condensing Equipment & Accessories:

The function of the condenser is to condense the steam

exhausted from the LP cylinders and to produce and maintain as



Job No: 15Z03



high a vacuum as possible in order to increase the enthalpy

drop, which can be utilised in the turbine.

The condenser will be of single-flow box-type surface condenser

with water boxes on each end for 800 MW sets. The steam

space will be of rectangular cross-section to achieve optimum

utilization of the enclosed volume for the necessary condensing

surface. The condenser will be located below the LP turbine and

form an integral part of it.

Each condenser unit would be transverse mounted and would

condense exhaust steam by circulation of cooling water (inlet

temperature 32.5 °C max.) in a recirculating cooling water

system using wet type cooling tower. Condenser outlet water

temperature may be maintained within 42.5 °C. Sea water

would be the cooling medium in the condenser and other

auxiliary coolers. Condenser tube shall be welded titanium ASME

B-338 GR II and tube support plates shall be carbon steel.

Cathodic protection with Zn or Al sacrificial anode would be

provided, if required. The condenser would be designed as per

HEI code or equivalent. The heat load of the condenser will

correspond to the turbine operating condition with VWO having

105% MCR steam flow, 1.5% make-up, 85% tube cleanliness

factor and a maximum cooling water inlet temperature of 32.5

°C to maintain rated condenser pressure of 77 mm of Hg

(absolute). The condenser should also be capable of accepting

full HP-LP bypass steam flow safely without undue pressure rise,

vibration, noise or other detrimental effects. Oxygen content of



Job No: 15Z03



condensate leaving condenser hot well will not exceed 0.015 cc

per litre over the entire load range.

Lube Oil System:

The oil system will supply oil for lubrication and cooling of

turbine and generator bearings, and to the hydraulic shaft

turning gear during start-up and shutdown. This system will be

provided with AC & DC powered oil pumps. To improve

lubrication of the bearings during start-up and shutdown, a

jacking oil system will be installed which also supplies motive oil

to the hydraulic turning gear with hydrometric gear motor.

A separate, self-Contained high pressure fluid system with

dedicated pumps will be provided for lubrication & cooling of

turbine & generator bearings. The Lube oil system will

specifically include the following:

� The main oil pump will be centrifugal/gear type. The turbine shaft will directly drive it. It will have sufficient capacity to handle lube oil requirement of the bearings and emergency seal oil requirements.

� 2 x 100% AC Aux. oil pumps for start-up, slowdown of TG unit and as standby to MOP for automatic operation. These pumps will be in service during start up till the main oil pump takes over the supply.

� 1 x 100% DC emergency oil pump for meeting lube oil requirements of bearings during emergency with automatic starting on low lube oil pressure preset value.



Job No: 15Z03



� One (1x100%) each AC & DC motor jacking oil pumps will be provided to lift the rotor at the bearing during turning gear operation.

Each unit will be provided with an oil tank of sufficient capacity

for oil changes. 2x100% duty vapour extraction fans. The

2x100% capacity oil coolers will be provided for oil cooling.

A lube oil purification unit will be permanently installed for each

unit for the total oil charge on a continuous basis.

Turbine Control Fluid System:

For the governing and control system of the turbine a complete

self-contained control fluid system with oil pumps will be

provided. Fire resistant fluid will be employed to eliminate fire

hazards. The system will comprise:

� A control fluid reservoir of adequate capacity to ensure fluid supply.

� 2 x 100% AC motor driven pumps to pump the fire resistant fluid from the reservoir.

� 2 x 100% capacity control fluid coolers designed for service with DM water.

A control fluid purifying unit will be provided for the turbo-set for

purifying at least 20% of the total oil charge in the system per

hour on a continuous bypass basis. 2x100% capacity AC motor

driven purification pumps to circulate oil through purification

system will be provided. Necessary filters, strainers, piping,

fittings, valves and instruments shall be provided.



Job No: 15Z03



Air Extraction:

The unit will comprise 2x100% (1 working + 1 standby) vacuum

pumps along with all accessories and instrumentation for

condenser air evacuation. The vacuum pumps and accessories

will be used to create vacuum by removing air and non-

condensable gases from steam condenser during plant

operation. Vacuum pumps will be of single/two-stage liquid ring

type with both stages (if two-stage pump is selected) mounted

on a common shaft. Vacuum pumps will be sized as per latest

HEI requirements.

Condensate Extraction Pumps:

The condensate/feed water cycle would also comprise 3x50%

capacity motor-driven, vertical condensate extraction pumps of

CAN-type construction. Connection between condenser and each

pump will be through a block valve and removable strainer. The

pumps will discharge through check valve and motor operated

stop valves into a common discharge header. Connection for

condensate supply to the following major services will be tapped

off from this condensate discharge header.

a. LP bypass desuperheating spray

b. Turbine exhaust hood spray

c. Gland sealing system desuperheating

Condensate will then pass in series through the gland steam

condenser and drain cooler before being passed through the low

pressure feed water heaters.



Job No: 15Z03



Boiler Feed Water Pumps:

The feed water heating system will also comprise one(1) motor-

driven (50% capacity) and two(2) turbine-driven (50% capacity)

boiler feed water pumps. The head, capacity and net positive

suction head (NPSH) would be so selected as to permit parallel

operation at all loads and be compatible with the heat cycle

considered to meet the boiler MCR without encroaching on

normal margins. Booster pumps may be considered to ensure

appropriate head at pump inlet. The pumps will be provided with

mechanical seal, flushing arrangement as per API 610. The

supply would be complete with and inclusive of variable speed

hydraulic coupling, lube oil system, automatic leak-off, minimum

flow recirculation valves, bypass valves, base plates, foundation

bolts, couplings, 11 kV, 3 pH, 50 Hz electric motor drive.

The regenerative feed heating system would comprise vertical or

horizontal shell and tube-type high pressure feed water heaters

with bypass arrangement. Three(3)/four(4) stage horizontal U-

tube type low pressure heaters equipped with drain cooling and

condensing zones and individual bypass system is envisaged.

Besides these, separate drain cooler, gland steam condenser

etc. as per suppliers' standard, horizontal spray or spray-cum-

tray type deaerator with integral vent condenser to limit oxygen

content to a maximum limit of 0.005 cc/litre at all operating

conditions with minimum loss of steam are envisaged. The

storage tank should be adequately sized to accommodate at

least 10 minutes water requirement to provide feed water to

respective boiler at the BMCR condition. The two (2x50%) or



Job No: 15Z03



three (3x33%) nos. high-pressure heaters in parallel path will be

of horizontal/vertical U-tube type having desuperheating,

condensing and drain cooling zones. All steel construction of

condensate/feed water wetted surfaces is desired to facilitate

uniform chemical conditioning of steam-condensate-feed water

system.

Steam Generators:

Super Critical Pressure (“SCP”) power plant is envisaged with a

view to ensure better plant efficiency; minimizing basic fuel

consumption; and most important criteria being the drastic

reduction of emission quantities of SOx, NOx, CO2 and particulate

matters etc.

The SCP technology has been presently accepted in India and is

adopted in some of the major thermal power plants. The area

provided for the boiler and mill bay is 14 acres.

Furnace Type:

Two-pass/tower type spiral wall or vertical wall type are

normally considered.

The principal concern with a variable-pressure/sliding pressure

super critical-pressure design is the requirement for once-

through operation. The mass flow in the furnace-wall tubes must

be sufficiently high to avoid excessive metal temperatures and

uneven steam outlet temperatures when operating at super

critical pressure at higher boiler loads.

The draft system comprises of two(2) nos of FD fans each rated



Job No: 15Z03



for 60% of BMCR capacity. Two(2) Induced Draft (ID) Fans each

rated at 60% of BMCR flow will be axial inlet vane control type

with variable frequency drive arrangement.

With cold primary air system, it is possible to reduce the

capacity of Primary Air Fans (PAF) compared to hot primary air

system. Cold primary air system is adopted in all cases. Two PA

fans with 60% capacity are considered.

Pulverized Fuel Preparation System:

For firing coal pulverizers of slow speed large capacity bowl mills

will be provided having low auxiliary power consumption; and

relatively high life expectancy of grinding parts and armour

plating. The mills size and numbers will be selected such that on

an average one mill remains standby while one of the mill is

under maintenance.

Considering the grinding fineness required, it is suggested

equipping the mill with rotating classifiers having speed

adjustment to control grinding fineness. The firing system will

employ latest the ‘state-of-the-art’ burners and permit load

variation from 40 to 100% BMCR without use of support fuel.

The ratio of fuel and air flow will be controlled. Due to sufficient

burner wall distance and the burner swirl direction, operation

with low excess air is possible without the risk of wall damage.

Start-up Fuel System:

The fuel oil system will be provided for boiler start up; and for

flame stabilization during low load operation with or without coal



Job No: 15Z03



Firing. Two (2) types of fuel oils will be used.

� Light Diesel Oil (LDO/HSD) for boiler start-up (upto 10% of

BMCR)

� Heavy Fuel Oil (HFO) for low load operation and flame stabilization (40% of BMCR), as necessary.

Electrostatic Precipitators:

It is proposed to install high efficiency electrostatic precipitators

having an efficiency that will limit the outlet emission to 30

mg/Nm3 while the boiler is operating at its BMCR, firing worst

coal having maximum ash content.

The electrostatic precipitators will have six(6) gas streams,

isolated from each other on the electrical as well as gas side and

will be provided with gas tight dampers at inlets and outlets of

each stream, so as to allow maintenance to be carried out safely

on the faulty stream, while the unit is working. Electrostatic

precipitator will be provided with micro-processor based

programmable type rapper control system and ESP

management system to ensure the safe and optimum operation

of ESP. ESP transformer rectifier sets will use high fire point oil

as the cooling medium. The dust collection hoppers at all

strategic locations will have a minimum storage capacity of

eight(8) hours. The hoppers will have heating arrangements to

prevent ash sticking to the sloping sides and down pipes. Level

indicators to indicate and trip the ESP in case of high ash levels

in the ash hoppers, which will jeopardize the safety of ESP

otherwise. The area provided for the ESP is 12 acres.



Job No: 15Z03



Flue Gas Desulphurising System (FGD):

FGD system, to be installed behind the chimney. The design and

layout of steam generator and its auxiliaries will be such that a

wet flue gas desulphurisation system can be installed, taking

suction from duct after ID fan and feeding the de sulphurised

flue gases back to the chimney with provision for bypassing the

FGD system. The FGD system would require around 0.2 million

tonnes of limestone per year. The generation of Gypsum is

around 0.3 million tonnes per year. Closed storage area with

storing capacity for 30 days is provided for the limestone and

gypsum in FGD material handling area located at the eastern

boundary of the plant. The total area provided for the FGD

system is around 17 acres. In addition, an open storage area of

50 acres is provided within the plan boundary near the ash dyke

for the disposal of Gypsum.

Chimney:

Total 3 (Three) stacks with stack height of 275 m (two twin flue

and one single flue stack) is envisaged for the proposed units.

5.4 Auxiliary System

The philosophy of design of the auxiliary system would be

predominantly guided by the land features, technology, basic

parameters, infrastructure etc. The other facilities to be

developed are, coal transportation from Tuticorin by railway, coal

storage and handling systems, fuel oil system, 765 kV

switchyard, ash handling facility, etc.



Job No: 15Z03



All the systems and system components would be designed for

simplicity of operation and ease of maintenance so as to call for

minimum manual labour and low degree of supervision. System

redundancy would be provided as per good engineering

practices. Brief technical features of Major Systems & Equipment

are enclosed as Annexure-5.1.

Plant Water System:

The consumptive water requirement of the proposed 5x800 MW

station is of the order of 39193 m3/hr (approx) (7839 m3/hr per

unit) to be met by drawal of water through an intake well with

pump house to be constructed on off-shore.

The cooling water system is based on recirculating cooling

system using wet type Natural Draft Cooling Tower (NDCT) for

the condenser and auxiliary equipment cooling circuit. Based on

the available sea water analysis it is envisaged that a cycle of

concentration of 1.3 would be achieved. The total area provided

for the plant water system is around 138 acres.

Sea water is the main source of water for the proposed power

station. It is planned to draw 39193 m3/hr of water from sea

through an intake pump house.

For the proposed 5x800 MW station the total sea water

requirement is estimated on the basis of about 1% heat cycle

make-up, make-up to cooling towers usually associated with



Job No: 15Z03



average daily plant load apportioned on hourly basis and other

consumptive requirements like potable water, RO-DM make up,

sealing water, Service water, HVAC makeup etc. It is proposed

to utilise cooling tower blowdown in ash handling plant slurry

disposal system. The breakdown is detailed in Annexure-3.2

furnished earlier and the water balance diagram is given in

Drawing No.15Z03-006-DWG-M-009.

It is envisaged that Six (6) (4W + 2S) nos. of 10300 m3/hr

capacity intake pumps would be installed in the sea water pump

house.

Sea water from the intake system would be pumped to CT

forebay as CT makeup water, Electro-chlorination plant and a

part of sea water will be clarified in the DAF Clarifier at site to

remove the suspended solid. Clarified water from DAF Clarifier

would be stored in an intermittent clarified water storage tank.

Sea water from cooling tower basin would be pumped to

condenser. Water requirement for Desalination plant would be

pumped from intermittent clarified water storage tank by use of

Desalination plant feed pumps two (2) nos. (1W+1S).

Of these, cooling tower make-up is the largest quantity

involved. Considering the ambient parameters and gestation

period, Natural Draft Cooling Towers (NDCT) have been

proposed. Apart from the condenser cooling, other auxiliary

cooling will be achieved by circulating sea water by a separate

set of auxiliary cooling water (ACW) pumps. These ACW pumps



Job No: 15Z03



would also be located in the same CW pump house. Sea water in

auxiliary cooling water system would be utilised as a secondary

circuit with DM water as a primary circuit of plate type heat

exchanger to cool the auxiliary coolers.

Cooling water in circulation estimated for the units would include

the requirement of auxiliary cooling circuit. The make-up water

requirement for the Natural Draft Cooling Towers (NDCT) at full

load will be around 33125 m3/hr (6625 m3/hr per unit). The

cooling tower blow down is expected to be about 25380 m3/hr.

For 5x800 MW station fifteen (15) nos. [2W + 1S per unit] CW

pumps and ten (10) nos. [1W + 1S per unit] ACW pumps are

envisaged. DM Closed Cycle Cooling Water Pumps Four(4) [3

working + 1 standby] per unit.

The desalinated / product water from desalination plant would

meet the following requirements:

� BWRO-DM plant

� Sealing and cooling water for ash handling plant

� HVAC System

� F.G.D system

� Potable water for plant & township

� Service water requirements

� Coal Handling Plant Dust suppression

� Fire protection system

Fire water requirement would be supplied from the desalinated /

product water storage tank and a built-in dead storage would be

provided as per Tariff Advisory Committee (TAC) requirement.



Job No: 15Z03



For potable water supply to the project, a separate set of pumps

drawing water from desalinated / product water storage tank

and with necessary chlorine dozing is envisaged. An overhead

tank of about 50 m3 capacity would be located at the top of

powerhouse and drinking water would be supplied to different

consumption points through piping. On apportioned basis about

100 litre of potable water may need to be supplied per person

per day. BWRO permeate water would be supplied to the

demineralisation plant, which would comprise of three(3)

(2W+1S) chains of 90 m3/hr (each). DM water would then be

stored for 24 hours in Four (4) rubber lined mild steel DM water

storage tanks of each 1100 m3 capacity, located near DM Plant.

The proposed DM plant along with the neutralisation pit,

acid/alkali handling system would be located close to the DM

water consumption point to optimize on DM water pipeline. DM

water from the DM water storage tanks would thereafter be

pumped to the condensate storage tanks located near the boiler

area. Five(5) condensate storage tanks each of 500 m3 capacity

is envisaged. Water from this tank will be supplied as heat cycle

make-up and to the chemical feed system, H2 generation plant.

Make-up requirements for CCCW system and condensate

polishing system.

Demineralisation Plant & Heat Cycle Make-up

System: Assuming average 1.0% make-up for the heat cycle and

accounting for four hours regeneration time, three(3)



Job No: 15Z03



demineralising chains of 90m3/hr feed flow capacity each have

been envisaged for the proposed unit. In the proposed DM plant

two streams will be in operation and one stream will be as

standby. DM plant will also supply heat cycle make-up, the

make-up requirement for primary water circuit of stator cooling

system, chemical feed system, CPU make-up and DM water

requirement for the hydrogen generation plant.

Desalinated/product water would be pumped to the RO-DM

plant for demineralisation. In the RO-DM plant,

Desalinated/product water will be passed through RO plant

(Stage-II) and then to mixed bed exchangers. The

demineralised water will be stored in DM water storage tanks.

Acid and alkali handling, storage and feeding system will be

installed for the DM plant resin regeneration. The DM water

produced in the plant would then be taken to Four (4) DM water

storage tanks, each of 1100 m3 capacity to meet the total

requirement in case of any exigency. DM water from the storage

tanks would be transferred to unit condensate storage tanks by

2 x 100% capacity DM transfer pumps.

Service Water System:

Service water for the project would be used for floor washing,

air filter cleaning and other non-priority items etc.,

Desalinated/product water shall be taken to an overhead tank

for onward distribution to above consumption points.



Job No: 15Z03



Coal Handling System:

For the purpose of equipment selection the worst coal

combination (imported 50% & indigenous 50%) has been

adopted. The total area provided for the Coal handling system

including MGR system is around 148 acres.

The scheme of the proposed Coal Handling System is shown in

Drawing No.15Z03-005-DWG-M-006. Adequate redundancy

has been adopted to ensure uninterrupted operation of the

system. The Coal Handling system to be designed based on the

worst coal (50:50).

i) Gross calorific value 4221 kCal/kg ii) Hourly coal consumption 2093 TPH

419 TPH per unit iii) Max. daily consumption of coal

at MCR50240 TPD

10048 TPD per unitiv) Annual requirement for

proposed station @ 85% PLF 15.59 MTPA

3.11 MTPA per unitv) Maximum size of coal delivered

at plant end (-) 50mm

vi) Mode of coal transportation By railway from Tuticorin Port.

Coal for the proposed station would be eventually available from

Indonesia. The coal in (-) 50 mm size would be transported to

the plant site in rake loads. To operate the station at MCR, 14-

17 rakes/day loads of coal need to be received. With the above

in view 24 hr operation of coal receiving facility is envisaged. To

estimate the design capacity of conveyors and coal handling

system a margin of 20% may be considered towards presence

of shale in raw coal. The bunker capacity for the unit is



Job No: 15Z03



considered to be 14-hours. The balance of plant and equipment

of CHP would be designed for three-shift operation for the

proposed station which will take care of outage requirement and

running maintenance. The handling capacity of receiving and

stacking facilities for the proposed power is of 4500 TPH two

streams (1W + 1S) rated capacity. However, figures on coal

consumption and conveyor capacity may be revised at DPR

stage as per available input data at that time. Merry-go-round

system is envisaged for the proposed project. Three (3) nos.

Track hoppers is provided for handling the 17 rakes/day of

BOBRN type wagons. The coal from the hoppers would be fed to

the crusher house , crushed to the size of (-)25 mm. The coal

stack would be equipped with two (2) nos. reversible stacker-

cum-reclaimer and two (2) nos. single direction stacker-cum-

reclaimer with stacking rated capacity of 4500 TPH and

reclaiming rated capacity of 2000 TPH. The stacker-cum-

reclaimer would be rail-mounted, electrically-driven unit with 50

m boom length having 270° slewing and adequate luffing

provision to stack the coal upto a height of 9 m and reclaiming

the same afterwards. In the normal route coal can be directly

taken to the power-house bypassing the coal stack.

Coal Bunker conveying system, the Unit 1,2 & 3 will be provided

with separate twin stream conveyor system with rated capacity

2000 TPH form the stock pile to bunker. Unit 4 & 5 will have

another independent twin stream conveyor system with rated

capacity 2000 TPH. Interchange coal feed facility is also

provided for the two independent conveying system.



Job No: 15Z03



Crushed coal would be transported to the bunkers via the

inclined conveyors and the bunker level conveyors. Bunkers

would have a storage capacity of about 14 hours’ fuel

requirement for the boiler. The bunkers will be provided with rod

and slide gates, arch breakers, etc. to facilitate operation.

Necessary belt weighing at bunker level conveyors, electro-

mechanical and capacitance type level indicators, fuel sampling

units, flap gates etc. would be provided in the system as

required. Dust extraction and suppression system will be

provided for all the coal transfer points to control the fugitive

emissions. Special precautions will be taken for pollution control

by providing dust extraction and dust suppression systems at

different transfer points and ventilation system for underground

tunnels. In addition, roof extraction fans will be provided in key

areas like boiler bunker floors. Pressurized ventilation system

with unitary air filtration unit will be provided for control room

and MCC buildings.

Necessary water distribution network for drinking water with

pumps, piping, tanks, valves etc. will be provided for

distributing water at all transfer points, control rooms etc.

Similarly, service water network will be provided.

A centralised control room with microprocessor based control

system is envisaged for operation of the Coal Handling Plant.

Except locally controlled equipment like dust extraction/dust

suppression/ventilation equipment, sump pumps, water

distribution systems etc. all other in-line equipment would have

provision of remote control. However, provision of local control



Job No: 15Z03



would also be provided. All necessary interlocks, control panels,

MCCs, mimic diagrams etc. would be provided in the main

control room for safe and reliable operation of the Coal Handling

Plant.

The major equipment for the proposed project are listed below:-

1. Track Hopper : 3 nos.

2. Rotary plow feeder : Twelve (12) nos.

3. Belt conveyors : Coal stacking stream conveyors of 4500TPH.

Reclaiming and bunker supply stream conveyors of 2000 TPH

4. Stacker-cum-reclaimer : Four(4) Nos. with stacking capacity of 4500 TPH and Reclaiming capacity of 2000 TPH.

5. Crushers : Four(4) Nos.

6. Metal detectors : Ten(10) Nos.

7. ILMS : Twelve(12) Nos.

8. Belt weighers :Fourteen (14) Nos.

9. Coal sampling unit : Three(2) Nos.

10. Flap gates, rack & pinion gates, etc. : As required.

11. Level indicators : Electronic type.

12. Chute liners and chute : One lot supporting structures

13. Bulldozer : Six(6) Nos.



Job No: 15Z03



Ash Handling System:

To meet the requirement of the prevailing environmental norms

of the Tamil Nadu Pollution Control Board (TNPCB) and Central

Pollution Control Board (CPCB) guideline, the system considers

Dry collection and disposal of Fly Ash, Dry extraction of bottom

ash. Ash will be primarily disposed by truck to end users as far

as possible. Besides provision will be made to transport fly ash

(only during emergency) and Bottom ash through pipe line to

the ash dump area. The total area provided for the Ash handling

system is around 5 acres. The ash dyke area is around 522

acres.

The quantum of ash generation would depend on the plant load

factor and the quality of coal being fed. In keeping with the

designed system capacity envisaged for CHP, worst coal with

ash percentage of 26% is used for equipment selection of the

Ash Handling Plant. It has been estimated that about 544

tons/hr (max.) of ash would be generated from the proposed

project considering 5 units. Assuming the ratio of fly ash to

bottom ash as 80:20, usually adopted for design of such

application, about 22 tons/hr of bottom ash and 87 tons/hr fly

ash is required to be removed from each unit. Ash generation

rate being moderate, intermittent ash removal arrangement

with necessary storage hoppers (i.e. bottom ash hoppers,

economiser/air pre-heater/ESP hoppers) to hold ash for 8 hours

is envisaged. Bottom ash evacuation in 4 -hours per shift and fly

ash evacuation in 4-4 1/2 hours per shift has been considered.



Job No: 15Z03



In Drawing No. 15Z03-005-DWG-M-007, the scheme

proposed for the Ash Handling Plant of the project is shown. The

scheme proposes Dry extraction and disposal of bottom ash via

Dry conveyor, crusher, pneumatic conveying system bottom

ash silo. The design capacity of bottom ash evacuation system

would be 45 TPH for each boiler. Fly ash from ESP, air heater

and economiser collection hoppers and stack hoppers would be

conveyed through vacuum system to the intermediate surge

hoppers from where ash would be transmitted by pneumatic

pressurised system to the fly ash storage silo. As shown in the

sketch, conveying air compressors would be used to transfer fly

ash to the silos. De-ashing from fly ash hoppers would operate

on an auto sequence mode with total operation time spanning 4

to 4.5 hours in a shift. Four(4) streams of pneumatic conveying

system of capacity about 100 Tons/hr each have been

considered for each boiler. The ash would be conveyed through

pressure conveying system upto the fly ash silo located near the

boundary of the plant. The design capacity of the pressure

conveying system would be optimized to suit this requirement.

Bottom and dry fly ash would thereafter be transported in

covered trucks from the respective silos for end use. An

additional spare nozzle may be provided below the fly ash

storage silo for slurry disposal lean mode of disposal which is

around 20% ash concentration on volumetric basis. Normally,

dry disposal mode would be operational. Provision is kept for

selling ash from the dry ash disposal spout of silo to the possible

users. A small quantity of water will be sprinkled to moisten the



Job No: 15Z03



ash in the silo unloaders prior to loading in the trucks for truck

disposal.

For the purpose of the present project report the above system

has been considered for working out the project cost. The Ash

Handling System control room will be located adjacent to ESP

control room for ease of operation.

Fluidizing Air System:

Continuous supply of fluidizing air during ash evacuation has

been envisaged in all the hoppers of the ESP and the stack to

facilitate smooth and effective ash flow. For this, fluidizing air

blowers of adequate capacity (2x100%) and pressure would be

provided. The fluidizing air system would be complete in all

respects with necessary piping, valves and instruments to

ensure satisfactory system operation.

MCC & Control Panel:

415 V MCC (Motor Control Centre) and control panel for the Ash

Handling Plant would be located inside a separate room annexed

to the ESP control room. Ash Handling System operation can be

done in automatic sequential manner and/or remote manual

mode from the PLC based control panel.



Job No: 15Z03



Fuel Oil Handling System:

The fuel oil handling system would comprise receiving, storage,

pumping and heating of both HFO and LDO. Oil would be

brought to the plant in either rail wagons or by road tankers

from nearby depots. Two(2) HFO storage tanks of 5000 m3 and

two(2) LDO storage tanks of 1250 m3 are envisaged for the

station. The system would be complete with unloading pumps,

filters, pressurizing pumps, pipeline, instruments etc. The total

area provided for the Fuel oil handling system is around 4 acres.

Ventilation & Airconditioning System:

Right environment for operation and maintenance of the plant

as well as for proper functioning of the equipment, controls and

accessories is an important aspect which has been given due

consideration in the proposed Ventilation and Air Conditioning

System.

Ventilation System:

Adequate ventilation system has been considered for the

powerhouse building, Central Control Building, ESP control

building, Air Compressor House, Blower room for Ash Silo &

Vacuum Fly Ash System, Switchyard Control Building and other

areas like A/C plant room, Switch gear room for Cooling Towers,

DM plant building, CW Treatment Building, Chemical House, DG

Building, Hydrogen Generation Plant, Elevator Machine rooms

and various pump houses like CW/ACW pump house, Raw Water

pump house, Ash Slurry pump house, Clarified Water pump

house, Fuel Oil Unloading and Pressurizing pump house etc. with



Job No: 15Z03



their associated Electrical rooms, Workshop and Store, Fire

Station Building, Kitchen/Pantry and Toilet areas of Canteen

Building, Service building and Administrative Building etc. to

achieve the following :-

i) Dust-free comfortable working environment.

ii) Scavenging out structural heat gain and heat load from various equipment, hot pipes, lighting etc.

iii) Dilution of air polluted due to generation of obnoxious & hazardous gaseous/aerosol contaminants like acid/chemical fumes, dusts etc.

Ventilation system proposed for important areas are described

below:

a. Powerhouse and Central Control Building

Supply/exhaust ventilation system with evaporative cooling

has been recommended for the powerhouse building.

Ambient air would be drawn through air inlet louver,

automatically cleanable water flooded type SS mesh filters,

water wetted fill deck and moisture eliminator and will be

supplied by means of centrifugal fans to powerhouse

through ducting and grilles to achieve proper distribution.

The sprayed water over the SS mesh filter will be re-

circulated by means of centrifugal pumps, piping, valves

and other accessories. Similarly, water dripped over the Fill

Deck will also be re-circulated by means of centrifugal

pumps, piping, valves and other accessories.

'Exhaust' system consists of axial flow wall/roof-mounted

exhaust fans with rain protection cowl/hood, short



Job No: 15Z03



ductwork, etc. Part of the supplied air will be exhausted

and the rest will ex-filtrate through the various openings in

the structure, preventing infiltration of dusty air.

Various non air conditioned rooms in the Central Control

Building e.g., cable spreader room, switchgear & MCC

rooms, SWAS wet panel rooms and Battery Charger rooms

etc. will be ventilated by means of the same Evaporative

Cooling units for Power House.

Exhaust ventilation system will be provided for the Battery

Rooms to evacuate acid fumes and hydrogen. Bifurcated

type exhaust fans will be employed for this purpose.

Coal tripper floors are proposed to be provided with exhaust

system to eliminate building-up of hazardous gases like

carbon monoxide, methane etc.

Pressurized Ventilation system will be effected for the

Elevator Machine rooms by means of wall mounted Fan-

Filter units and back draft dampers.

All toilets will be ventilated by providing wall mounted

exhaust fans.

b. ESP and AHP Control Buildings

For ventilation of these building (except the control room),

ambient air will be drawn through unitary air filtration unit

comprising fresh air intake louvers, automatically cleanable

SS mesh filters (with water spray) and moisture eliminator



Job No: 15Z03



and supplied to the space by means of centrifugal fans.

Water sprayed over the filter will be re-circulated by means

of centrifugal pumps.

In addition to filter cleaning, the water spray will have an

evaporative cooling effect too. This will produce some

cooling effect as an additional advantage.

The supplied air will be exhausted through wall mounted

gravity operated dampers (Back Draft Dampers) to

maintain an overpressure of 1-2 mm of water column to

reduce dust ingress.

c. Other Buildings

Other buildings like Air Compressor House, A/C plant room,

DM plant building, CW Treatment Building, Chemical House,

DG Building, MCC/Switchgear room of Switchyard Control

Building, Hydrogen Generation Plant Building, Aeration

Blower room for Ash Silo and Blower Room for Vacuum Fly

Ash System, Various pump houses, like CW/ACW pump

house, Raw Water pump house, Ash Water pump house,

Ash Slurry pump house, Clarified Water pump house, Fuel

Oil Unloading and Pressurizing pump house etc. with their

associated Electrical rooms, Workshop and Store, Kitchen/

Pantry and Toilet areas of Canteen Building, Service

Building and Administrative Building etc. will be ventilated

by means of dry system comprising axial flow fans, dry

filter (wherever required), cowls, ducting (wherever

required), gravity dampers (wherever required) etc. Inside



Job No: 15Z03



dry bulb temperature (DBT) is expected to be higher than

ambient by about 3 °C.

Air Conditioning System:

Various control rooms in power station, housing a group of

sophisticated and precision control panels and desks call for

controlled environment for proper functioning and for personnel

comfort.

Some other facilities like Administrative Building, Service

Building, Canteen Dining Hall etc will also call for comfortable

environment for the occupants.

The following areas are proposed to be air conditioned:-

a. Control room, control equipment room, Shift Charge Engineers’ rooms, computer room, UPS room SWAS dry panel room, CPU Control room, Laboratory room, located in the Central Control Building/Turbine Building.

b. Electrostatic precipitator control room

c. AHP Control Room

d. Coal Handling Plant Control Room

e. DM plant control room, office and Laboratory area

f. Office areas, lecture rooms etc. in the service building

g. Switchyard Control Room

h. Weighbridge Control Room

i. Fire Station Control Room

j. AC Plant Control Room

k. Hydrogen Generation Plant Control Room

l. Other Control rooms housing PLC panels

m. Different floors of the Administrative Building



Job No: 15Z03



n. Dining Hall of Canteen Building

To cater to the above requirements the following systems are

proposed:-

i) A central chilled water plant to cater to the air conditioning requirement for the Central Control Building and Service Building, comprising Vapour compression Chiller and stand-by Screw Chillers, condenser cooling water circulating pumps, cooling towers, chilled water circulating pumps, cooling water and Chilled water piping with valves, accessories, fittings, supports, insulation as applicable, steam piping with fittings, supports, insulation, PRDS and associated Electrical items etc. has been envisaged. The chilled water produced in this central Chilled water plant will be circulated through the coils of individual air handling units for the respective air conditioned rooms/areas. This Central Air Conditioning System will be operated and controlled from the AC plant Control room DDC panels and two nos. Workstation PCs.

ii) Individual Water Cooled Precision Air Conditioners (PAC) will be provided for AHP Control room and DM plant Control Room, Office and Laboratory. Condenser Cooling water will be supplied to such PAC units from the Plant ACW system. Such PAC units will be operated and controlled from their built-in Microprocessor based Control console.

iii) Individual Air Cooled Precision Air Conditioners (PAC) will be provided for Switch Yard Control Room and CHP Control

room. Such PAC units will be operated and controlled from their built-in Microprocessor based Control console.

iv) Air Cooled Ductable Split/ Packaged Air Conditioners will be provided for Dining Hall of the Canteen Building and Administrative Building. These Air Conditioners will be operated and controlled from their built-in Microprocessor based Control Console/ hand operated Remote Control Panels.



Job No: 15Z03



v) Air Cooled Non-Ductable Split Air Conditioners will cater to the AC requirement of ESP Control room, Weighbridge Control room, Fire Station Building Control room, Hydrogen Generation Plant Control room, AC plant Control room and

other small control rooms housing PLC panels. These Air Conditioners will be operated and controlled from their individual hand operated Remote Control Panels.

Compressed Air System:

For the proposed units Twelve (12) (6 Nos (5W+1S) of IA and 6

Nos.(5W+1S) of PA) compressors with 55 Nm3/min would be

provided. The instrument air compressors will be oil-free type,

and will be provided with individual air receivers to absorb

pressure pulsation and for acting as reserve supply of

compressed air to permit continued operation following failure of

the operating compressor until the standby one comes into

service. A desiccant-type dryer unit with 100% standby,

automatic regeneration facility etc. will be provided for each unit

for supply of clean, dry air to Control and Instrumentation

System. Compressor house with area of 90mX40m is provided.

The station service air requirement for normal cleaning

purposes, atomising air medium for warm-up guns and igniters,

motive power for burner drive mechanism, emergency drive for

air pre-heater (in case of regenerative type) etc. will be met

from separate plant-air compressors. The plant air compressors

would be identical to the instrument air compressors and would

run in a manner, similar to that described above for the

instrument air compressors. Capacities of all the instrument

and plant air compressors selected would be similar for both the



Job No: 15Z03



phases, so as to achieve interchange-ability of parts.

Independent air receivers will be provided for each compressor.

Plant service air system will have suitable inter-connection with

the instrument air header for augmenting instrument air supply

in emergency.

Fire Protection System: For protection of the plant against fire, all yards and plant will

be protected by any one or a combination of the following

systems:-

a. Hydrant system

b. Automatic high velocity and medium velocity sprinkler system

c. HV & MV water spray (Emulsifier system)

d. Fixed foam system for HFO & LDO tanks

e. Portable and mobile chemical extinguishers

f. Inert gas flooding system for Control room, control

equipment area, inverter and battery rooms

The system will be designed as per the guidelines of Tariff

Advisory Committee (TAC) of the Insurance Association of India.

Applicable Codes and Standards of National Fire Prevention

Association (NFPA), USA, would also be followed.

In view of vulnerability to fire and it's importance in the running

of the power station, effective measures are to be taken to

tackle fire in the following susceptible areas :

i) The cable galleries, and

ii) Coal handling areas, mainly the conveyors, transfer points and tunnels.



Job No: 15Z03



For containment of fire and preventing it from spreading to

cable galleries, unit-wise fire barriers with self-closing fire

resistant doors will be provided. The ventilation systems

provided in the cable galleries, would be so interlocked with the

fire alarm system that in the event of a fire the ventilation

system is automatically switched off. Also to avoid spreading of

fire, all cable entries/openings in cable galleries, tunnels,

channels, floors, barriers etc. would be sealed with non-

inflammable/fire resistant sealing material.

The source of water for the fire water pumps of the hydrant

system, water spray and sprinkler system etc. will be the water

with connection from cooling tower basin (to be used only

during extreme emergency). Two(2) electric motor driven fire

water pumps with one(1) diesel engine driven pump as back-up

for sprinkler system will be provided in the fire water pump

house. In addition to these, jockey pump sets, hydro-

pneumatic tanks, compressors, pipes and fittings as required

will be provided. The hydrant system will feed pressurised water

to hydrant valves located throughout the plant and also at

strategic locations within the power-house.

Automatic high velocity sprinkler protection system will be

provided for cable galleries, cable trenches/vaults, coal

conveyors etc. Automatic medium velocity sprinklers will be

used for protection of burner zone of boiler front.

Automatic type water spray (emulsifier) protection system

would be provided for the following equipment:-



Job No: 15Z03



a. Generator transformers

b. Unit auxiliary transformers

c. Unit and Station transformers

d. Turbine oil storage tanks

Suitable fire detection system as necessary for all the above

mentioned fire fighting system with adequate supervisory

circuitry will be provided.

In addition to these, adequate number of portable and mobile

(wheel mounted) chemical fire extinguishers of foam and soda

acid type and carbon-dioxide type will be provided. Portable

units would be placed at suitable locations throughout the plant

area. The extinguishers may be used during the early stages of

fire to prevent spreading. Fire station building of area

(80mX25m) is provided for the power plant facility.

FIRE DETECTION & ALARM SYSTEMS:

A fire detection system as per National Fire Protection

Association standards recommended practices shall be provided

Manifestation of fire shall be sensed by the following methods:

� Photoelectric smoke detectors

� Multi sensor type smoke detectors

� Heat detectors (Rate of rise heat type or Fixed heat type).

Both the type of detectors shall be addressable from the

panel and operator interface.

� Infrared Ember Detector

� Non-electrically operated Fibre Optic type LHS Cable



Job No: 15Z03



Piping, Valves, Fittings & Specialties:

The scheme of various systems such as, steam, condensate,

water, oil, air etc. have been explained above. Piping, valves,

fittings, hangers, anchors, supports, guides etc. would be

provided as required. All high pressure, medium pressure and

low pressure lines will be of proven quality and suitable for

conditions of operation encountered at the specific points.

Pipelines running outside the powerhouse will be routed over

trestles as far as practicable in order to avoid maintenance and

other problems encountered with trench piping and buried

piping. However, for any culvert crossing piping inside trenches

and for large diameter water lines buried pipes with proper

coating and water-proofing would be adopted.

Associated Facilities:

Repair Workshop :

The proposed station will have a well equipped workshop

housing adequate machineries. Besides, instrument, electrical

and maintenance shops are also envisaged. A repair shop for

mobile equipment and motor vehicle repair shop would be

developed. For heavy nature of maintenance, outside agencies

are to be deployed. Work shop of area (150mX70m) is provided

for the power plant facility.



Job No: 15Z03



General Stores :

Both covered and open space as required for storage of various

materials required for construction as well as operation and

maintenance of the plant. While the construction stores will be

temporary, the other stores will be permanent. Consumables,

tools and tackle and other relevant items required for the

project will be extended. Due to remote location of the plant,

the stores would be well-equipped to handle any contingency

situation. Accordingly, stores planning would be done for the

project. Stores of area 100m X 75m with open yard 110m X

100m is provided for the power plant facility.

The stores will broadly have the following divisions to house

material of different categories:

1. Heavy materials store will house boiler tubes of various

sizes, boiler and auxiliary parts, turbine heavy parts,

stainless steel plates, conveyor belt and other coal handling

equipment spares, dozer spares, motors, transformer

windings, fire fighting equipment, insulators and hardware

connectors, copper and aluminium conductors and similar

heavy items.

2. Mechanical, electrical and instrument stores will accommo-

date small spare parts for mechanical and electrical

equipment and instruments respectively.

3. Fast moving spares viz. electrodes and welding materials,

blow lamps, bulbs and light fittings, grease, soap, battery,

cotton waste and cloth, brooms, motor vehicle spares, gas



Job No: 15Z03



cylinders, gloves, aprons, safety belts, goggles, ropes, refill

for the fire fighting equipment etc. will be stored in a

separate godown.

4. Chemical stores will house alum, lime, morpholin/hydrazine

resin, spirit and other chemicals required for steam, feed

water and condensate system and chemical laboratory.

5. A civil engineering godown will accommodate cement,

sanitary materials, filtering sand and filters, pipe and pipe

fittings etc. for water supply.

6. Refractories and lubricants will be stored under separate

covered sheds.

Open storage-yard will be provided to store structural steel,

plate materials, pipes, heavy castings, cable reels etc.

Suitable enclosures will be provided for storing the insurance

spares. Arrangements will be made for storing items like relays,

motors, instruments under controlled atmospheric conditions.

Condensate Polishing System:

The proposed 5 x 800 MW project will be provided with 100%

capacity condensate polishing system. Condensate polisher will

comprise four(4) demineralisers per unit each operating in

parallel. Any three(3) of these units will be capable of treating

the full condensate flow at boiler MCR condition. Condensate

polishing will ensure elimination of ammonia, silica, sodium or

potassium from the condensate before being recycled to the



Job No: 15Z03



feed water system. During normal operation all the polisher

units will remain standby. In case of high condensate

conductivity, it will be pressed in service when three(3) of the

exchanger vessels will be working in parallel and the fourth one

will remain isolated from the system. The fourth vessel will act

as standby and will be brought into operation when regeneration

is required or during any emergency period. The polishing unit

would be located at the powerhouse building. The operation of

the condensate polishing system will be semi-automatic,

remote/manual.

The regeneration system will be external. For regeneration, the

resins from the exhausted exchanger vessel will be transferred

hydraulically to this facility located at DM plant and regenerated

resin sent back in the same way.

Chemical Laboratory & Testing Facilities:

Plant will be provided with Chemical laboratory, C&I laboratory

and Electrical laboratory with necessary test equipments,

considered for the satisfactory and continued operation of power

plant. A fully equipped chemical laboratory would be provided

near the DM plant building. The testing and calibration

laboratories for C&I and relay-metering will also be housed in

the same building. Necessary equipment and standard

instruments for chemical analysis of various items, testing of

electrical items and testing/calibration of instruments would also

be provided. Lab with an area of 35m X 20m is provided for the

power plant facility.



Job No: 15Z03



Thermal Insulation:

Adequate insulation will be provided to reduce heat losses from

the equipment, piping and ducts and to ensure adequate

personnel protection in critical areas. Insulation would be so

selected that the covering jacket surface temperature does not

exceed the surroundings ambient temperature by more than

15K (15°C).

Pollution Monitoring System:

Monitoring of various environmental aspects is of prime

relevance in setting-up the proposed project. The following

aspects would be critically monitored:-

• To keep watch on the state of pollution • To generate data for predictive and corrective measures • To quantify environmental impacts

The important area requiring periodic/conditions monitoring

are:-

• Stack emission • Ambient air quality • Disposed water quality, if any.

Electronic smoke density analyser and gas analyser equipment

is proposed to be provided for continuous monitoring of

particulate matters at the outlet of ESP. Sample analysis of SO2

and other pollutants from chimney would be carried out. Waste

water would be checked for any harmful pollutants before

discharging to outfall.

An oil/water separation unit has been envisaged near fuel oil

day tank/pump house area in order to keep plant drains free of



Job No: 15Z03



oil and to reclaim waste oil as far as practicable. Oil thus

separated would be returned to the fuel oil tank after passing

through plate settlers and used or disposed off by incineration.

Coal Handling and Ash Handling Plants will be equipped with

dust extraction/suppression system to combat fugitive dust.

5.5 Electrical System & Equipment

Generation System & Power Evacuation:

The Proposed power plant will have 5x800 MW at Kadaladi

Taluk, Ramanathapuram Dist. in Tamilnadu with turbo

generators rated at 27 kV level. These units will be connected

to 765 kV GIS switchyard at the plant area as shown in the

layout for evacuation of generated power. Also 230KV GIS

switchyard is envisaged to receive start up power in case 765

KV system is not ready to supply start up power The total land

area provided for the Switchyard is around 102 acres.

In compliance with latest CEA Manual on Transmission Planning

Criteria – 2013, considering the large amount of power to be

evacuated, power evacuation from the plant is envisaged at 765

kV level. In order to meet N-1 single contingency condition

stipulated as per CEA planning criteria, minimum of two double

circuit lines will be required to evacuate the net available power

from the plant. Power from this switchyard would be evacuated

through two (2) 765 kV double circuit lines to the nearest 765

kV pooling station, (location to be decided by TANTRANSCO the

local STU). The Start-up power shall be received through station



Job No: 15Z03



switchyard connected to 765 kV grids. The power from grid shall

be received through Generator Transformer (GT) and Unit

Transformer (UT) to feed the station bus during start-up

operation. The Generator circuit breaker is envisaged between

Turbo generator and Generator Transformer. The bus bar

configuration of the 765 kV GIS switchyard will be one and half

circuit breaker arrangement as stipulated by CEA for better

reliability. The following circuit bays are envisaged in 765 KV

Switchyard:-

Five (5) – 765 kV circuits for generator transformers

Two (2) – 765 kV double circuits for outgoing lines

Two (2) – Spare bay (one equipped and another for future)

Five (5) – Shunt reactor bay (Qty to be decided during detailed

engineering)

Besides 765KV GIS, 230 KV GIS is also envisaged in order to

meet the station start up power requirement in case 765 KV grid

system is not ready to supply start up power. The station

transformers shall be connected to 230 KV system. Double bus

arrangement with buscoupler is envisaged for 230 KV system.

The following circuit bays are envisaged in 230 KV GIS

One (1) no Line in feeder

One (1) no Line out feeder

One (1) no Buscoupler

Five (5) nos station transformer feeder

One (1) no spare transformer feeder

The rating and requirement of line reactors, shunt reactors and

NGR for reactors will be provided in 765KV GIS as per system



Job No: 15Z03



studies requirement to be done during detailed engineering

stage.

A control room will be located in the switchyard premises to

house switchyard control, metering and protective equipment.

OFGW will be installed in the switchyard for reliable

communication and carrier aided distance protection of 765 kV

and 230KV system remote end breakers.

In the powerhouse each generator will be directly coupled to the

respective steam turbine. The generator will be a two-pole,

three-phase unit rated for 800 MW at 0.85 p.f. lag. 50 Hz. The

nominal voltage rating will be 27 kV or as per manufacturers’

standard with variation of ±10% in voltage, 50 Hz -5% +3%,

3-phase. The excitation system will be brushless type or static

excitation (based on the proven practice of Generator OEM) and

will be selected for an ideal rate of response, accuracy and

sensitivity during normal as well as transient state of operation.

The generator will be connected to the 765 kV GIS Switchyard

through three numbers single phase 330/264/198 MVA,

(765/�3kV)/27 kV, generator transformer (GT). The GT shall be

with OFAF/ONAF/ONAN type cooling and Vector group of YNd11.

The total capacity of each GT will be thus (3x330) 990 MVA. The

connection between GT low-voltage terminals to the generator

will be done by isolated phase bus duct and high voltage

terminals of GT will be connected to the switchyard bay through

ACSR overhead conductors. The fault level of the switchyard 765



Job No: 15Z03



kV shall be 50 kA for 1 sec at 765 KV level and the switchyard

shall have Main Bus I & II with 5000 Amps rating. The fault level

of 230KV system shall be 40KA for 1 sec and the main bus1 and

main bus 2 rating shall be 2000 Amps

Power Supply Arrangement to the Unit & Station Auxiliaries:

Three voltage levels viz. 11000 V, 6600 V and 415 V have been

envisaged to supply power to unit and station auxiliaries. The

drives for auxiliary equipment, having capacity above 200 kW

up to and including 1500 kW will be fed from 6.6 kV system and

those with capacity above 1500 kW will be fed from 11 kV

system. All motors rated 200 kW and lower will be fed from 415

V systems. Suitable HV and LV switchgears with suitable

auxiliary transformers, as described below, will be provided for

operation of these motors.

Scheme of the electrical power distribution arrangement to the

plant auxiliaries have been shown in Drawing No.15Z03-005-

DWG-E-001 (3 Sheets).

During normal power generating condition of generators, the

power supply to unit auxiliaries will be fed from the generator

terminal through Unit Transformer (UT) with GCB closed. During

unit start up and when generator is not in operation the supply

will be fed from the grid through Generator Transformer (GT) &

Unit Transformer (UT) with GCB open condition. Two (2) nos.

unit transformers have been envisaged per unit. Each UT will be

directly connected to generator bus duct and will be rated for



Job No: 15Z03



40/32 MVA, 27 kV/11.5 kV and with OFAF/ONAN cooling, Dyn1

vector group. However the actual rating shall be decided during

detail engineering.

Power requirement for unit start-up or shutdown and station

auxiliaries will be drawn from 765 kV Switchyard/Grid through

Generator Transformer (GT) & Unit Transformers (UT). The

station transformer (ST) will be provided with winding of

adequate MVA and voltage ratings and Vector Group as Unit

Transformer. ST will act as a standby back-up in case of UT

fails. Also the start up power can be drawn from 230KV system

in case 765 KV grid system is not ready.

The power supply to unit auxiliaries like ID fan, FD fan, PA fan,

BF pump, CW pump etc. will be from 11 kV Unit Switchgear fed

by UT. Balance HV motors like Mill, CE pump, DMCW pump,

IA/PA compressor etc. will be supplied from 6.6 kV Unit

Switchgear fed by 11/6.6 kV, 16MVA Unit Auxiliary Transformer

(UAT). (UAT rating shall be decided during detail engineering).

The station auxiliary loads will be fed from 11 kV Station

Switchgears located in the powerhouse. Separate 6.6 kV and

415 V switchgears will feed the loads for Coal Handling Plant,

Ash Handling Plant, Water Treatment Plant etc., located in the

respective plants as required. These 6.6 kV switchgears will be

supplied by 11/6.6 kV Station Auxiliary Transformer (SAT) of

suitable rating as required.



Job No: 15Z03



The 11 kV sides of Unit Transformer (UT) and Station

Transformer (ST) will be connected with the associated

switchgears through adequately rated segregated-phase bus

duct. The 11KV station switchgear is connected to the unit

switchgear by the Tie feeder. The auto bus transfer scheme is

envisaged (BTS system) for closure of tie feeder in case power

supply failure on the unit board.

OLTC panel is envisaged in the switchyard control room for

remote operation of station transformer on load tap changer.

The 6.6 kV side of Unit Auxiliary Transformer (UAT) & Station

Auxiliary Transformer (SAT) will be connected with the

associated switchgears through adequately rated segregated-

phase bus duct.

For PMCC/PCC switch board of 415 Volt system, 11 kV/415

Volts, 3-phase, 50 Hz, dry-type LV auxiliary transformers rated

2.5 MVA, 2 MVA, 1.6 MVA and 1MVA will be provided as

required. The HV side of these transformers will be connected to

11 kV buses by cables and the LV side will be connected to the

respective LV Switchgear/Power Control Centre (PCC)/Power-

cum-Motor Control Centre (PMCC) through non-segregated

phase bus duct.

The 11 kV system will be designed for 50kA fault level with short

time rating 3 seconds & 6.6 kV systems will be designed for 40

kA fault level with short-time rating 1 second. The 415 V

systems will be designed for 50 kA fault level with short-time

rating 1 second.



Job No: 15Z03



Emergency Power Supply System:

415 V emergency power supply system has been envisaged to

provide power to essential auxiliary loads required to permit a

safe shut down of the unit in the event of a plant blackout. In

addition, emergency power will be provided for auxiliaries and

services required for personnel safety and equipment safety

during the blackout. In order to meet the above requirement

Six (6) nos. 1500 kVA diesel generator sets will be installed,

considering each DG sized for one unit and the Sixth DG set will

act as common standby. The land area allocated for the DG

house is around 15m X 10m.

Plant DC System:

220 V Plant DC system has been envisaged for reliable power

supply to those loads, which are required to function for

security, protection and safe shutdown of plant in the event of

failure of normal AC power supply. Each unit will have two (2)

220 V battery set of adequate capacity. DC power supply

system for each unit comprises:

� 220 Volt DC batteries

� Battery charger (float and float-cum-boost charger)

� DC distribution and sub-distribution boards

Battery will be Lead Acid PLANTE type or Nickel-Cadmium (Ni-

Cd) type and the battery will be sized for one (1) hour back up

time subsequent to tripping of generating units. Separate

battery sets will be provided for 765 kV GIS switchyard, coal

handling system, plant water system and AHP.



Job No: 15Z03



Uninterrupted Power System:

Two(2) sets of UPS systems of continuous duty have been

envisaged to supply regulated, filtered and uninterrupted 240 V,

50 Hz, single phase power to critical AC loads like

Instrumentation control system, PLC system during normal as

well as emergency conditions. UPS battery will be sized for at

least sixty(60) minutes back up on failure of normal AC supply.

A separate UPS system of continuous duty has been envisaged

for 765 kV GIS switchyard control room Substation Automation

system, coal handling, ash handling and plant water system.

Control of Electrical System:

The Operation and Control of Electrical system/equipment have

been envisaged from the Central Control Room through

Operator work stations.

Control and operation of 765 kV GIS switchyard will be done

from switchyard control room. Accordingly, the 765 kV GIS

switchyard will be provided with complete sub-station

automation system with connectivity to plant DCS system.

DG sets will be controlled from AMF panel in DG room. Remote

control provision will also be provided in plant DCS.

Control panels for service system like coal handling plant, ash

handling plant, plant water system, etc. will be located in the

respective control room.



Job No: 15Z03



Protection & Metering System:

The necessary protective relaying system based on state of art

numerical technology according to established norms shall be

provided for EHV switchyards, over head lines, generators,

transformers, motors, auxiliary system etc., to minimize

damage to equipment in case of fault and abnormal conditions.

Numerical relays with 100% redundancy will be used for

protection of critical electrical equipment and non critical

electrical items the numerical relays with out redundancy shall

be provided.

Plant electrical parameters will be metered to the extent for

proper operation and monitoring of plant conditions. Separate

check meters and main meters will be provided in 765 kV and

230KV GIS switchyard line feeders for tariff metering of import

and export power.

Illumination System:

Suitable illumination system will be provided to facilitate normal

operation and maintenance activities and to ensure safety of

working personnel. Required illumination levels in different areas

will be as per standards/code of practice. Power supply for the

illumination system will be derived from the following sources:

� Normal AC System – to be powered from 415 V normal AC supply

� Emergency AC System – to be powered from 415 V emergency DG set



Job No: 15Z03



� Emergency DC System – to be powered from 220 V plant DC system

Illumination system will consist of lighting transformers, lighting

distribution boards, indoor & outdoor type lighting panels,

different types of lighting fixtures suitable for different plant

areas, lighting cables & wires, etc.

Intercommunication System:

Two-channel voice communication system with ‘Paging’ mode as

well as ‘Private’ mode has been envisaged for plant

intercommunication. A microprocessor based Digital Electronic

Private Automatic Branch Exchange (EPABX) is envisaged for the

telephone communication system.

Grounding & Lightning Protection System:

Comprehensive grounding system will be provided in the power

plant which will be achieved by ground mat buried at one (1)

meter depth below ground and provided with ground electrodes

at suitable intervals or as per IEEE80. All metallic parts of power

plant and switchyard equipment/structures will be connected to

the ground mat.

Generator neutral will be grounded through distribution

transformer and secondary loading resistor. 11 kV & 6.6 kV

systems will be high resistance grounded to limit the fault

current to the order of 300 Amp. 415 V power supply system

will be solidly grounded. DC system will be ungrounded.



Job No: 15Z03



For grounding of electronic equipment, a separate earthing

system totally isolated from the power equipment earthing mesh

will be provided.

Lightning protection system will be installed for protecting the

buildings/structures against lightning discharge. This would be

achieved by providing lightning masts/shield wires on stacks,

NDCT, powerhouse building, floodlight towers, towers in

switchyard etc. and connecting them with the ground grid.

Construction Power

It is envisaged that about 10 MVA construction power may be

required at 415V level when construction activities takes place

simultaneously in all unit and station areas of the plant.

TANGEDCO shall provide two single circuit 33 kV overhead lines

from KADALADI 110KV/33KV SS up to construction site.

At construction site suitable 33/11KV substation with 11KV/415V

distribution network with transformers and Distribution board

shall be provided to cater the construction power requirement.

5.6 Control & Instrumentation

The Control and Instrumentation System envisaged for the

project would be designed using microprocessor based state-of-

the-art technology with adequate redundancy to ensure

� Safe, efficient and reliable operation of the plant under all operating and plant load conditions for the entire plant life.



Job No: 15Z03



� Minimum human supervision and intervention in the plant operation.

� High Mean Time Between Failure (MTBF) and Low Mean Time To Repair (MTTR) of the Plant Equipment/System.

� Flexibility for ease of maintenance and plant operation and modular expansion capability.

� High degree of automation at all stages of operation.

� Diagnostic capability

Control & Operational Philosophy:

The Operation and Control of Main Plant Equipment of the

project have been envisaged from the Central Control Room.

One control room is envisaged for two units for centralised

control and monitoring of unit equipments.

a) One control room is envisaged for control and monitoring of

Unit 1 & 2 to be located between Unit 1 & 2

b) Second control room shall be used for control and monitoring

of unit 3 & 4 to be located between Unit 3 & 4

c) Third control room shall be used for control and monitoring of

Unit 5 and common monitoring of CHP, AHP, Water treatment

plant, etc to be located adjacent to Unit 5.

A Distributed Control System (DCS) have been envisaged for

the operation and control of Steam Generator (SG), Turbine

Generator (TG) and its auxiliaries.



Job No: 15Z03



Stand-alone Control System using Programmable Controllers

(PC) have been envisaged for Coal Handling Plant, Ash Handling

Plant (AHP), Pre-water Treatment Plant and DM Plant from the

respective Local Control Rooms/Local Control Panels. Hardware

interfaces shall be established with the DCS for remote

monitoring of critical parameters.

The overall control of the plant shall be carried out from three

control centres and each are divided into following sub plant

controls.

a. All control activities involving steam generators, turbine

generators, electrostatic precipitator and other associated

equipment from unit control room (DCS based system).

b. All control activities involving coal and ash handling plant,

pre-water treatment plant, DM plant from local control room

(PLC based system & interfaced with DCS system for remote

monitoring).

c. The control & monitoring of 765 kV switchyard shall be from

Switchyard control room located near switchyard (SCADA

based system). However monitoring of important parameters

shall be provided in each Main plant control room.

Main Plant & Equipment :

Steam Generator (SG):

The operation and control of the Steam Generator (SG) shall be

achieved through Man-Machine Interface (MMI) Station from

Central Control Room.



Job No: 15Z03



The various controls such as Furnace Draught, Drum Level, HP

Bypass, Superheater Temperature, Combustion Control etc.

shall be performed through dedicated Controllers in the

Distributed Control System (DCS).

All sequential operations,controls & boiler protection trip for

Boiler Auxiliaries viz. FD Fan/ID Fan/PA Fan, coal mills etc. have

been envisaged through MMI Station and dedicated Controllers

of DCS.

Turbine Generator & its Auxiliaries:

A separate and dedicated microprocessor based ‘Control System’

have been envisaged for the protection of the Turbine and

Control of the Turbine Governing Valves, Automatic Turbine

Run-up, Turbine Stress Evaluator, Automatic Turbine Testing

etc. All other Controls viz. LP Bypass, Lube Oil Pumps, Control

Oil Pump etc. will be implemented in DCS. Turbine Supervisory

System shall be provided along with suitable link to DCS for

monitoring. All sequential operation, necessary interlock

function and Auto/Manual operation of start/stop of the drives/

pumps shall be performed through MMI station of DCS.

The start/stop operation and control of all other major

equipment viz. Condenser, CEPs, LP Heaters, Deaerator, BFPs,

HP Heaters etc. shall be achieved through the MMI Station.

Control/sequential logic function and turbine trip shall be

implemented in DCS. All major drives shall have local start/stop

facility for testing purpose. BFPs shall be provided with local

gauge board and vibration monitoring system. The operation



Job No: 15Z03



and control for the Common Auxiliaries of the station shall be

achieved through dedicated Controllers and HMI in DCS.

Functional Description of the Monitoring/Control System :

General Technical Requirements :

All equipment, system and accessories considered shall be from

latest proven product range of established manufacturers and

shall conform to applicable national and international standards.

Adequate measures shall be taken into consideration to make

the system fail safe such that loss of signal, loss of power supply

or failure of any component will not lead to hazardous conditions

as well as prevent occurrence of false trips.

Distributed Control System (DCS) :

A latest proven microprocessor based state-of-the-art

Distributed Control System has been envisaged for the project.

Control System shall be open architecture type to make the

system user friendly. Adequate redundancies would be provided

at all possible levels to achieve highest system availability.

The proposed Distributed Control System shall comprise

� Functionally Distributed Controllers, Communication

Processors, I/O Modules, Local Bus, Power Supply, etc.

� The task and duties to be performed are

� Sequential Control/Close Loop Control related to SG, TG

and its auxiliaries.

� Acquisition of data and its validation



Job No: 15Z03



� The sequence and interlock functions performed by DCS

would be functionally arranged in groups/subgroups for

auto operation

� Real Time Stamping for the inputs related to sequence of

Event Recording

� MMIs and Controllers shall be connected by bi-directional

high-speed redundant data hi-way

� Man-Machine Interface Station and its peripherals shall

perform the following:-

� Operational facility for auxiliaries of SG, TG and balance

of plant

� Displays like Mimic, Loop, Graphics

� Generation of Reports & Annunciation

� Performance and efficiency calculation

� Self-Diagnosis

� Fall back features of MMIs

� Interfacing with Large Video Screen (LVS) in Control

room

� The system shall be provided with User friendly operating

and application software.

� Dual Redundant Programmable Controllers (PC) for various

offsite plants shall be provided.

Steam & Water Analysis System (SWAS):

SWAS shall be designed for continuous monitoring of Steam and

Water quality at salient points of the cycle based on the



Job No: 15Z03



International Standards. SWAS shall perform the following

functions.

a. Sample handling to perform pressure and temperature

conditioning of the sample to suit the analyzer probes.

b. Analysis of pH, Conductivity, Dissolved Oxygen, Silica etc. at

various points to monitor and control the steam and water

quality at the desired level.

c. Monitoring, recording, annunciation of various parameters

shall be provided for remote DCS as well as for local SWAS

Panel.

All these SWAS related equipment would be housed in the SWAS

Room.

Continuous Emissions Monitoring System:

Continuous Emissions Monitoring System has been envisaged to

meet the statutory requirement. PC based Continuous Emissions

Monitoring System shall be envisaged along with remote

transmission facility through serial link. The particulate matter,

SO²,NOx, Hg shall be monitored in Flue gas at stack as

stipulated by MOEF

Rotating Machinery Supervisory System:

Vibration Monitoring System for major rotary equipment shall be

provided as per the manufacturer’s recommendation. These

vibration and supervisory systems will be complete with

sensors, junction box, special cables, transmitters, analysis

system with monitors & communication capabilities with DCS.



Job No: 15Z03



Field Instruments:

Field Instruments shall be suitable for area in which these are

located. In general, field instruments shall be weatherproof,

dust tight and corrosion resistant. Field instruments shall be

suitably grouped or clustered area-wise and shall be terminated

in local junction boxes.

Process Transmitters :

All the Process Transmitters will be 2-wire ‘SMART’ type.

Process Gauges :

Pressure Gauges (Bourdon/Bellows type), Temperature Gauges

(Mercury filled-in type with SS armoured capillary/Bimetallic),

Level Gauges (Transparent and Reflex type) etc. shall be

provided for local monitoring.

Temperature Sensors :

All Temperature Sensors will be ‘Duplex’ type, bearing & winding

temperature measurement shall be provided for HT drives as

per the manufacturers’ recommendation.

Process Switches :

For critical alarm and protection/interlock functions direct

process switch contacts will be used.

Flow Elements :

For the measurement of low-pressure flow for clean fluids,

concentric square edge orifice plates shall be provided. Flow



Job No: 15Z03



Nozzles shall be provided for measurements to control for high-

pressure water/steam service. For fuel oil service, positive

displacement/target-type flow-meters/Vortex flowmeters shall

be used. Aerofoils, annubars and venturies shall be used for air-

flow measurement.

Final Control Elements :

Generally pneumatic type Control Valves shall be provided

except for critical functions where hydraulic type actuator shall

be considered.

Cable & Accessories :

Necessary cables including prefabricated cables, data highway

cable, instrumentation cable, compensating cable, control cable

etc. shall be included. Generally cables will be overall screened,

and with FRLS outer sheath. All interconnecting cables between

cabinets will preferably be prefabricated with connectors at both

ends.

Panels & Cubicles :

Operator’s Console comprising workstations, CRTs would be

provided in the each Central Control Room. The system

cabinets containing hardware would be placed in the Control

Equipment Room. Local panels would be provided for local

monitoring and interfacing of Operators whenever needed.



Job No: 15Z03



Erection Hardware :

Erection hardware including all process connection and piping

materials like impulse pipe, manifolds, fittings, pneumatic line

tubes and pipes along with necessary fittings, junction boxes,

cable accessories like glands, conduits, trays etc. shall be

provided.

Instrument Insulation Criteria :

All instruments shall have clear access for maintenance,

removal, lay down, calibration etc.

All readable instruments shall be clearly visible unassisted.

Access platforms shall be provided for easy access of

instruments, valves and actuators for maintenance.

Spares & Consumable:

All electronic cabinets shall have installed spares to the extent of

10% to allow expansion and modifications. In addition, 20%

spare capacity is to be provided in the form of rack space for

augmentation & spares shall be judiciously distributed.

All commissioning spares and consumable shall be supplied as

part of main package. This is in addition to spare parts to be

included for three (3) years’ of trouble-free operation.

All failure-prone items shall be clearly identified and adequate

spares are to be provided for such items.



Job No: 15Z03



Tools & Tackle:

All special tools and tackles shall be considered.

Utility :

In general, the electronic panels shall receive 240 V AC 1-Phase,

50 Hz at the desired locations. Two nos UPS adequately rated

with 1 Hr battery back-up facility shall be provided for the

critical systems.

Separate instrumentation earthing shall be provided for

protection of the system.

Ambient Air Quality Monitoring system (AAQ):

The comprehensive ambient air quality monitoring system with

necessary sample collection system and probes shall be

provided in the project area. The location of the monitoring

station shall be decided taking into consideration the upwind

direction, predominant downwind direction, habitation and other

sensitive receptors. AAQ shall include PM10, PM2.5, SO², NOx,

CO and Mercury measurement and recording.

5.7 Plant Layout

The area identified for locating the grass root power station is

spread over 902.36 Ha of land and is located at a distance of

nearly 65 km South-East of Ramanathapuram town. The plot has

a ECR on the Southern and would be entrance of the road traffic

to the station. The station conceived would be of 4000 MW

capacity five units of 800 MW each deploying state-of-the-art



Job No: 15Z03



technology with conventional layout. The plant layout of the

proposed thermal power station within the identified space is

shown in Drawing No. 15Z03-004-DWG-M-003.

This layout shows a single terrace plot plan. Thus when the

contour survey will be available a multi-terrace layout will have

to be developed.

A conventional layout for the boiler and the turbine has been

suggested for the power plant with the axis of the TG set

transverse to that of boilers. As such, the plant is laid in East-

West direction as per the shape of the plot. The turbine bay is

followed by the heater bay, the electrical bay, the boiler proper

with side mill bay configuration, electrostatic precipitators and

lastly the chimney. The main plant area houses the turbine

building, steam generator, 765 kV GIS switchyard, circulating

water system, water treatment and DM plant, coal handling

system with Railway siding and the ash disposal system. The

disposition of the different elements has been decided on the

basis of their functional inter-relations and the direction of

incoming or outgoing materials.

Unitised concept has been followed in the plant design as far as

practicable. The unloading-cum-erection bays are considered at

the beginning of the powerhouse building while the coal

conveyor entry planned suitably for side mill configuration.

Since the units would be implemented with a time gap of three

(3) months in between, this will not cause any hindrance in

construction of later units. The main power block with the



Job No: 15Z03



switchyard is located along the north south axis of the plot with

the direction of evacuation to the south. Water treatment

facility will be located on the south-east of the power block. It is

proposed to deploy wet type Natural Draft Cooling Towers in

the recirculating cooling water circuit. The cooling towers are

located to the west of the powerhouse building with a designed

gap, to optimise on length of C.W. piping.

The coal yard along with other auxiliaries would be located on

the north of the plot. Four pair of stacks of coal storage with

handling facility have been planned at this location. The coal

yard will be equipped with four stacker-cum-reclaimers. Coal

stack lies in East-West direction. These would cater 30 days’

requirement of coal for the station.

Three Track Hoppers have been envisaged for receiving rake

loads of coal. Merry-go-round system is envisaged for the

proposed project. However, details of coal transportation and

unloading facilities would be finalised based on study reports.

The power plant along with the area earmarked for auxiliaries

and accessories would be located within the common security

wall of the complex. The access road would enter the plant from

the south, which is connected to the ECR. Another access for

receiving material is shown at the north-eastern end and will

lead to FGD material handling area, ash silos and fuel oil area.

The Administrative Building (60m X 20m), for the entire

complex is located at the entry to the plant and would have a

boundary wall around with suitable entry. Service building (75m



Job No: 15Z03



X 75m) provided adjacent to the TG building All the senior

executives of the power station will be located in this building.

The entry to the Power Plant will be flanked by security gate,

time office. It is proposed to construct one Crèche (24m X

11m), Dispensary(30m X 10m) and canteen (30m X 30m)

facility.

Provision of disposing fly ash by trucks from ash silos located

on the western side of the plot is kept for gainful usages. The

layout considers green verge as per MoEF norms.

5.8 Civil Engineering Aspects

Plant Grading:

The elevation of the selected site is about 6 m above MSL. This

may be further worked upon when survey map of the plot is

available and shall be duly addressed in DPR stage. Leveling

and grading shall be carried out by selected cutting and filling

of existing ground surface and earth. The cutting and filling

requirements should balance each other to avoid earth from

borrow pits as far as possible. Different grade levels may be

adopted for different areas.

Soil Characteristics & Foundations:

The soil investigation of the plot is yet to be conducted. It was

noticed during reconnaissance visit to the area, the top cover is

composed of moorum followed by fragmented rock underneath.

Detail soil investigation of the plot identified is necessary for



Job No: 15Z03



deciding on the type of foundation. For the purpose of the

report, raft foundation with RC raft has been considered.

Seismic Consideration:

The power station area is located in Zone-II as per the

demarcation of IS:1893-2002 of Indian Code of Practice.

Analysis and design of structures would be carried out

accordingly taking into consideration the factors related to soil

characteristics and importance of the structure together with

the basic seismic co-efficient as per provision of Indian Code.

Wind Conditions: The maximum wind pressure including winds of short duration

as specified in Indian Standard Code of Practice IS:875-1987

(Part-3) will be adopted for the zone where the proposed power

station is located. The site is located in the zone as per above

standard having design wind speed of 40 m/sec.

The provision of Indian Standard Code of Practice IS:875 with

appropriate co-efficient for variation of heights and shape will

be considered for detail design.

�



Job No: 15Z03



ENVIRONMENTAL ASPECTS 6.1 Introduction

The selected plant site is encompassed by the villages

Tharaikkudi, Kannirajapuram and Narippaiyur villages of

Kadaladi Taluk, Ramanathapuram District. The site is around

2.3KM from sea coast line and at a distance of 65km from

Ramanathapuram town. The area has typical tropical climate

with hot summer and moderate winter.

Supply of electricity is a basic need to support modern society

and sustenance of economic and commercial activities. Imported

coal from Indonesia any other country and Indigenous coal from

Talcher, Odisha. Electricity generated in this power project would

be transmitted to State Grid. Availability of quality power on

sustained basis at a competitive price would be the main focus of

the project. High investment in infrastructures together with

availability of power in the area would attract other ancillary

industries to be set up in the vicinity which in turn would have

spin off effect on the community at large.

Besides Kadaladi Talk in Ramanathapuram District is a very

backward area and prone to communal disturbances, a power

plant of this 5X800 Mw capacity will bring in lot of employment

opportunities both direct and indirect and will pave away for

communal harmony in this area.



Job No: 15Z03



The effect of the proposed project on environment should be

seen in the broader perspective of overall impact on the

neighborhood. There are no archeological monuments within

25km radius of the proposed sites. The site does not include

any forest land. Three Bird sanctuaries are located in the

vicinity Melselvanur-Keelselvanur bird sanctuary at around 17

km, Chitrangudi bird sanctuary and Kanjirankulam bird

sanctuary at around 22 km & 20 km respectively from the

selected site (Site-B). The GOMNP (Gulf of Mannar National

park) Vembar zone Uppu Tanni Tivu is around 11 km and

Thoothukudi zone kariashuli Tivu is around 23 km from the

selected project site. The site falls within the buffer area of the

GOMBR (Gulf of Mannar Biosphere Reserve). Further

assessment on environmental impacts and the requisite

management plans shall be pointed out in a separate EIA/EMP

study. The tentative location of intake and outfall is around 12

km and 19km away from the Uppu Tanni Tivu and Kariashuli

Tivu in Gulf of Mannar. The location details are included in the

Site Location Map of the proposed Thermal Power Plant

Drawing No. 15Z03-004-DWG-M- 002 (sheet 2 of 2).

Industrial growth is always associated with some effects on

environment. Attempts will, however, be made both at macro

level as well as micro level to minimise detrimental effect of the

proposed project on the surrounding area. The proposed power

station would be equipped with state-of-the-art pollution control

devices to bring down the emission/discharge of pollutants

within the acceptable norms of the country.



Job No: 15Z03



It may be noted that the project area is vacant land without

agriculture and free from R&R issues. As there is no habitation,

no major eviction is involved. Project authorities would make

adequate arrangement for rehabilitation and resettlement, if

required as per the R&R norms laid down by the state

government. Separate arrangement to address corporate social

responsibilities (CSR) would be taken up by the project

authority (For CSR activities the value considered is not less

than 0.4% of the project cost).

6.2 Environmental Pollution from a ThermalPower Plant and Controlling Measures

To evaluate the effect of the proposed project on the

surrounding environment, various factors such as population

distribution in the vicinity, type of land use, possibility of

pollution from various sources etc. would be taken into

consideration.

� Optimum blend of coal to reduce the consumption.

� Super Critical technology to have higher boiler efficiency

and reduced GHG emission.

� Closed cooling water system with cooling towers

envisaged, thus reducing significantly the makeup water

requirement for the plant.

� Low NOx Burners and provision of Selected Catalytic

Reduction (SCR) for NOX control

� ESP to minimize the PM emissions

� Stack of height 275 m to get better flue gas dispersion.

� Provision of FGD for SOX control



Job No: 15Z03



� Dust Control System to minimize the fugitive dust

emission dust extraction / Dust suppression system in

CHP.

� Provision of wind shield around coal stock yard

� It is proposed to use closed trucks for fly ash

transportation in order to avoid dust nuisance. To reduce

the dust nuisance while loading the ash into the trucks

from fly ash and bottom ash silos, the ash is conditioned

with water spray.

� Water sprinkling system to be envisaged in the ash

disposal area and Gypsum disposal area to restrain flying

of fine to atmosphere.

A thermal power station utilising coal as its source of energy

may pollute the environment in a number of ways. The major

pollutants likely to affect the environment of the neighborhood

are:-

a. Suspended particulate matters (stack emission & material

handling plant)

b. Toxic gases viz. SOx, NOX (stack emission)

c. Thermal pollution (stack, cooling tower etc.)

d. Liquid effluent from plant services, power house drains, oil handling run off, run off from coal pile area, DM & CPU plant regeneration waste, Sea water clarifier sludge, Side stream filter backwash waste, ash pond run off and domestic waste.

e. Noise generated during plant operation

f. Dust emission in CHP and ash generated by burning fuel.



Job No: 15Z03



The various pollution control measures envisaged for the

proposed project are as follows:-

i) Emission from Stack

Deployment of supercritical technology in the steam

generator ensures lesser specific fuel consumption vis-à-vis

generation of particulates, NOx and SOx compared to sub-

critical technology. Since ash content of the fuel is

expected to be in the range of 26% (considering worst

coal), a sizeable quantity of fly ash in the form of

particulate matter would be generated. An efficient

electrostatic precipitator will be provided to limit the

emission of particulate matters to 30 mg/Nm3 (MOEF

norm). The design would have provisions to augment and

ensure lesser emission in the event of change of statute.

High two twin-flue and one single flue stack are proposed

to limit ground level concentration of SOx, NOx, etc. within

acceptable limits by proper dispersion. With a properly

designed furnace and burner system, generation of CO and

NOx would be minimised.

Heat loss through the stack is only about 8-10% of the

total heat input to the furnace. This is nominal when

compared with the capacity of earth as the heat sink and

this would be adequately dispersed with the plume from

the high stack. Moreover, majority of the heat in cooling

tower is rejected in the form of evaporation loss. This does

not cause any appreciable thermal pollution to the

surrounding area.



Job No: 15Z03



ii) Liquid Effluent from Water Treatment & Other Areas

The heat cycle make-up water requirement under stabilized

condition for the 5 X 800MW power station would be of the

order of 125 m3/hr of demineralised water. The

demineralising process would generate alternately acidic

and basic effluents after regeneration of such type of

exchangers. These effluents would be neutralised in a

neutralising basin where proper neutralising arrangements

for the effluent fluids would be provided. The neutralized

effluent water would be discharged into the equalization

basin termed as Guard Pond. In Drawing No.15Z03-006-

DWG-M-009 waste-water generated from the plant and

their treatment scheme are shown.

In the recirculating cooling water system, the make-up

water would be sea water. There will be blow down from

the circulating cooling water system. This blowdown would

largely be utilised in ash handling system. Sidestream

filtration shall be envisaged to control the Total suspended

solids (TSS) level at sea outfall in order to meet the MOEF

norms.

Other wastes from the processes include clarifier sludge &

side stream filter backwash sludge waste which would be

sent to sludge pond/pit and clean water as overflow would

go to clear well and sludge would be pumped to ash pond.

Other wastes from the processes like CPU regeneration

would be neutralised in a neutralising basin where proper



Job No: 15Z03



neutralising arrangements for the effluent fluids would be

provided. The neutralized effluent water would be

discharged into the equalization basin termed as Guard

Pond in Effluent treatment plant. AHP seal water system

drains, waste from floor cleaning of plant area would be

discharged into the Guard pond.

In the power plant, some specific locations in turbine area

and boiler area require washing, to maintain good plant

housekeeping and prevent build up of dirt and waste

material, which generate waste water. This waste water

along with process drain will be led to an oil water

separator for separation of oil. The clear water will be led to

the Guard pond/central monitoring basin in Effluent

treatment plant. The dirty oil will be recovered separately

in a drum and sold to local users.

The Guard Pond in Effluent treatment plant will act as an

equalization basin for all treated/untreated liquid effluents.

Provision will be there for use of this treated and equalized

effluent partly in horticulture and green belt development.

For the excess quantity, attempts will be made to attain

‘zero waste water discharge’ through RO plant.

The sewage will be collected from the Administrative

building and canteen area, powerhouse area and fire

station area. Sewage waste from the administrative

building and canteen area will be collected by gravity into

an oil grease trap. After the oil removal, sewage is

collected in a bar screen chamber, where the floating



Job No: 15Z03



particles are removed from the sewage. From the bar

screen chamber sewage is collected in a septic tank for

anaerobic treatment. Sewage is then allowed to pass

through an upflow filter. During the process, most of the

COD, BOD and TSS in the sewage are removed. Overflow

from upflow filters is collected in an oxidation pond where

sodium hypochlorite solution is added for disinfection.

Then treated effluent will be pumped for horticulture

purposes.

iii) Noise Emission

Noise emission from equipment will have to be controlled at

source. Adequate silencing equipment will be provided at

various noise sources to attenuate the noise to acceptable

level. Also plantation would be developed in plant area,

which would help in reducing noise level to some extent.

In Annexure-6.1, a list of basic equipment/instruments

for environmental monitoring and testing for the proposed

station is given.

iv) Guard Pond

It is envisaged to develop a guard pond to be located

suitably in the low lying area of the plot for collecting the

liquid wastes. The capacity of the pond would be adequate

to store 24-hours’ design liquid effluent discharge from the

station. Treated and equalized effluent from the Guard

Pond will be treated in the effluent treatment plant by

alkali/acid dozing and let off to be reused in horticulture

and green belt development within the plant. Balance



Job No: 15Z03



treated effluent conforming to the norm will be discharged

to the RO plant to achieve zero waste water discharged

satisfying the requirement as stated in MOEF notification,

Govt. of India.

The storm water and catchment water which are not

effluent from the plant would be drained by a separate

drainage system.

v) Green Belt

Adequate green belt would be developed in and around the

project area and the ash disposal area satisfying the

requirement of state as well as Ministry of Environment and

Forest (MOEF), Govt. of India. Plantation near coal stacks

and the ash disposal area to arrest fugitive dust are also

proposed. These green belts, apart from arresting air-borne

dust particles and acting as noise-barrier, would help in

improvement of ecology and aesthetics of the area. The

area provided for Green belt is around 300 acres.

vi) Rain Water Harvesting System

Rain water harvesting system would be followed for the

proposed project. In this scheme, roof water and surface

water of the plant area would be collected through open

storm water drain networks. The discharge outlet of these

drain networks would be connected to a recharging pit from

where water would be allowed to percolate into the ground.

The basic purpose of this scheme is to assist the ground

water table stability. Also, it is a compulsory scheme as per



Job No: 15Z03



the recommendations of the statutory/environmental

bodies.

vii) Solar Power Harvesting

TANGEDCO proposes to harness solar power on the roof

tops of main power plant building, switchyard control room

building, water treatment building etc. The estimated area

to be available for setting up solar power plant on above

roof tops would be 3000 sq. m. Solar Technologies

available are as follows :

a. Solar photovoltaic cells

b. Crystalline silicon

c. Thin slim modules

The quantum of solar power expected to be generated is in

the order of 1200-1300kW.

It is proposed to utilize solar power for control room

lighting, switchyard area and switchyard control room

lighting and water treatment/chemical analysis laboratory.

Its integration with plant area electrical system would be

examined at appropriate stage.

Viii) DRY COOLING SYSTEM (Alternate option):

Dry Cooling system is considered as an alternate option for

the proposed project. Dry cooling systems are of two types

Direct and Indirect.

In direct dry cooling system, exhaust steam from LP turbine

is directly cooled in a system of finned tubes by ambient



Job No: 15Z03



air. Mechanical draft to be used to move the air through fin

tube heat exchange elements. To reduce pressure drop in

steam conveying system, it needs to be installed close to

the turbine hall.

In an indirect dry cooling system, exhaust steam from the

turbine is cooled by water in a condenser which can be of

surface type, and hot water is cooled by air in finned tube

bundles utilizing natural draft tower. The air cooled

condenser units can be located away from the main plant.

The cooling system shall be selected based on optimization

of water requirement vis a vis plant efficiency. The type of

cooling system shall be decided during detailed project

preparation stage based on economic consideration.

TABLE-6.1COMPARATIVE DETAILS OF WET AND DRY COOLING SYSTEM

Sl. No

PARAMETERS

WET COOLINGSYSTEM (NDCT)

DRYCOOLINGSYSTEM

REMARKS

1 Heat rate (Design Coal) kcal/kWh

2195 2349 Increase in differential rate by 7%

2 Plant Water requirement (m3/hr)

39193 7839 Decrease by 80%

3 Auxillary Power ConsumptionFor single unit

48 MW (6%) 54.5 MW (6.8%) -

4 Area Foot print 15 acres 20 acres Note* 5 Project Capital

cost excluding IDC

Rs 26,165 Crores

Rs 28,782 Crores -

6 Cost per MW 7.70 Crores 8.47 Crores



Job No: 15Z03



In case of dry cooling system the Raw Water requirement for the

plant shall be arranged from nearby desalination plant proposed

at Kudhuraimozhi (TWAD Board). However, the adoption of dry

cooling system will make the project economically unviable.

IX) Flue Gas Desulphurization Plant (FGD)

As per the sulphur content in coal as mentioned in

Annexure-3.3 of the report, no flue gas desulphurization

is necessary. However, as per guidelines of MoEF, the

installation of FGD plant at the rear side of ESP or chimney

is considered in the layout. The prescribed level for SOx is

within 100 mg/Nm3 as specified in the latest MOEF

notification.

Wet FGD system is proposed for the project. In wet FGD

system, limestone (CaCO3) is used as reagent.

Alternatively Dry FGD / Seawater FGD systems may be

adopted. The FGD system shall be selected based on

optimization of water requirement and plant efficiency and

shall be decided during detail engineering stage. The

performance / characteristics of different available FGD

technologies are given in Table – 6.1 below:

The makeup water requirement for wet (limestone) FGD

plant shall be met from desalinated product water. The

tentative quantity of makeup water requirement for the

proposed project is estimated at 1500m3/hr. The tentative

quantity of limestone slurry preparation for the proposed



Job No: 15Z03



project is estimated at 120m3/hr. Limestone slurry

preparation quantity (120m3/hr) is met from desalinated

water (60m3/hr) and recycled water (60m3/hr) from FGD

waste water treatment plant.

The slurry/waste water generated in Wet FGD system shall

be passed through hydrocyclone followed by a filtration

plant to separate gypsum flakes and filtrate. The filtrate

is recycled back to the FGD makeup system. Zero liquid

discharge (ZLD) plant to treat waste water shall be

envisaged (if required). The FGD system would require

around 0.2 million tonnes of limestone per year. The

generation of Gypsum is around 0.3 million tonnes per

year. Closed storage area with storing capacity for 30 days

is provided for the limestone and gypsum in FGD material

handling area located at the eastern boundary of the plant.

The total area provided for the FGD system is around 17

acres. In addition, an open storage area of 50 acres for the

disposal of Gypsum is provided within the plan boundary

near the ash dyke.

F

easi

bilit

y R

epor

t fo

r 5 x

800

MW

Kad

alad

i Sup

er C

ritic

al

Ther

mal

Pow

er P

rojec

t at

Kada

ladi

Tal

uk,

Ram

anat

hapu

ram

Dist

rict,T

amil

Nad

u

Job

No:

15Z

03

5x8

00 M

W-K

UM

TPP

-FR

-TA

NG

ED

CO

SEC

- 6

SE

/E/T

H(P

)/EE

/E/K

DI/F

.DP

R/P

.O.N

O.3

/D.3

/201

6 -1

38-

Tab

le 6

.2 –

The

per

form

ance

/ c

hara

cter

istic

s of

FG

Ds

DES

CR

IPTI

ON

UN

ITW

ET F

GD

DR

Y F

GD

S

EA-W

ATE

R F

GD

Hig

h S

ulp

hu

r in

Gas

Econ

omic

al.

Mos

t w

idel

y us

edN

ot e

cono

mic

al.

Not

pra

ctic

al for

hig

h S c

oal

(>1%

S)

Rea

gen

ts u

sed

Lim

esto

neLi

me

(Lim

e is

mor

e ex

pens

ive

than

lim

esto

ne)

Sea

wat

er

SO

2 r

emov

al

effi

cien

cy%

Rem

oval

effic

ienc

y up

to

98%

Rem

oval

effic

ienc

y up

to

94%

Rem

oval

effic

ienc

y up

to

90%

Pow

er

Con

sum

pti

on

(% P

ower

Pla

nt

Cap

acit

y)

%U

se 1

– 1

.5%

of

elec

tric

ity g

ener

ated

Use

0.5

– 1

.0%

of

elec

tric

ity g

ener

ated

, le

ss t

han

Wet

FG

D

Use

0.8

– 1

.6%

of el

ectr

icity

ge

nera

ted

Sp

ace

req

uir

emen

t %

10

0 60

-70

70-8

0 A

bso

rben

t co

st

%

100

400

Nil

By-

pro

du

cts

gen

erat

ion

an

d

dis

pos

alG

ypsu

mD

ry C

alci

um S

ulph

ite,

Cal

cium

Sul

phat

e M

ixtu

reSul

phat

e Io

ns

Util

ized

in C

emen

t an

d G

ypbo

ard

appl

icat

ions

Dis

posa

l cos

t ca

n be

hi

gh.

No

by-p

rodu

cts

F

easi

bilit

y R

epor

t fo

r 5 x

800

MW

Kad

alad

i Sup

er C

ritic

al

Ther

mal

Pow

er P

rojec

t at

Kada

ladi

Tal

uk,

Ram

anat

hapu

ram

Dist

rict,T

amil

Nad

u

Job

No:

15Z

03

5x8

00 M

W-K

UM

TPP

-FR

-TA

NG

ED

CO

SEC

- 6

SE

/E/T

H(P

)/EE

/E/K

DI/F

.DP

R/P

.O.N

O.3

/D.3

/201

6 -1

39-

Com

mer

cial

gra

de

by-p

rodu

ct

Land

-fill

ing

Non

e. D

isch

arge

of Sea

Wat

er a

spe

r st

ipul

ated

con

ditio

n is

cr

itica

l. Im

pact

s on

mar

ine

envi

ronm

ent

need

to

be c

aref

ully

exa

min

ed

(e.g

., r

educ

tion

of p

H,

inpu

ts o

f re

mai

ning

hea

vy m

etal

s, fly

ash

,te

mpe

ratu

re,

sulfa

te,

diss

olve

d ox

ygen

, an

d ch

emic

al o

xyge

n de

man

d).

Inve

stm

ent

cost

100

70-8

0 70

-80

Pla

nt

Cap

ital

cos

t in

crea

se11

– 1

4%

9 -

12%

7

- 10

%

Feasibility Report

for 5 x 800 MW Kadaladi Super Critical Thermal Power Project at Kadaladi Taluk,

RamanathapuramDistrict,Tamil Nadu Job No: 15Z03

5x800 MW-KUMTPP-FR-TANGEDCO SEC - 6 SE/E/TH(P)/EE/E/KDI/F.DPR/P.O.NO.3/D.3/2016

-140-

X) SCR (Selective Catalytic Reduction):

SCR system is envisaged for the proposed system to

control of NOx emission. The prescribed level for NOx is

within 100 mg/Nm3 as specified in the latest MOEF

notification.

6.3 Basic Information for Environmental Clearance:

The background pollution level, in terms of SPM, SOx, and NOx

etc. of the area is expected to be well within the prescribed

limits of MOEF.

Project authority will institute a separate study on

Environmental Impact Assessment (EIA) to identify the effect of

the project on the surrounding environment. The site does not

include any forest land. Three Bird sanctuaries are located in

the vicinity. Melselvanur-Keelselvanur bird sanctuary at around

17 km, Chitrangudi bird sanctuary and Kanjirankulam bird

sanctuary at around 22 km & 20 km respectively from the

selected site (Site-B). The GOMNP (Gulf of Mannar National

park) Vembar zone Uppu Tanni Tivu is around 11 km and

Thoothukudi zone Kariashuli Tivu is around 23 km from the

selected project site. The site falls within the buffer area of the

GOMBR (Gulf of Mannar Biosphere Reserve). Further

assessment on environmental impacts and the requisite

management plans shall be pointed out in EIA/EMP study. The

tentative location of intake / outfall location is around 12 km

Feasibility Report




-141-

and 19 km away from the GOMNP Uppu Tanni Tivu and

Kariashuli Tivu respectively in Gulf of Mannar. As such the plot

identified for the project does not involve any eviction and thus

no rehabilitation would be necessary. Thus, no adverse

economic impact is foreseen.

As mentioned earlier, there would be no encroachment of any

water body by the proposed project. The project also considers

establishing all the major cost intensive items for pollution

control viz. ESP, chimney, low NOx burner for furnaces, waste

water treatment and recycling, afforestation etc.

6.4 Ash Management Plan

A plot of 522 Acres has been identified for ash pond for

dumping ash generated from the proposed project. Considering

Bottom ash slurry disposal for 25 years and fly ash disposal of

1st year-100%, 2nd year-75%, 3rd year 50% and 4th year 25%.

This area includes the peripheral road and statutory green belt

around the disposal area. The Ministry of Environment & Forests

notification dated 3rd November, 2009, 100% fly ash utilisation

from the complex need to be ensured within initial four years of

operation. The ash generated can be gainfully utilized for filling,

land filling of low lying areas located in closed vicinity and in

cement plant. Possibility to minimize the requirement of ash

dumping in the ash pond to be established. The high utilisation

rate can be achieved by a comprehensive program for the

standardization of by-products and active marketing of the by-

Feasibility Report




-142-

products. Co-operation between the power plant and the

Utilising Industry contributes to the high utilisation rate.

6.5 Gypsum Management Plan

The successful environmental management strategy, which

initiate the concept of sustainable development, is the

maximum utilisation of the residue. Gypsum from a wet

scrubbing system can be a substitute for natural gypsum. The

areas of utilization of gypsum are in building materials for

products like wall boards, plasterboards, mortars, cement etc.

There should be a consideration of utilising the gypsum as close

to the power plant as possible, which can be achieved by

envisaging construction material production near power plant.

Possibility of selling the gypsum for other uses would also be

explored to minimize the requirement of dumping. The

generation of Gypsum is around 0.3 million tonnes per year.

Closed storage area with storing capacity for 30 days is

provided for gypsum in FGD material handling area. An open

storage area of 50 acres for the disposal of Gypsum is provided

within the plan boundary near the ash dyke.

�

Feasibility Report


Ramanathapuram District,Tamil Nadu Job No: 15Z03

5x800 MW-KSCTPP-FR-TANGEDCO ANN – 3.1 SE/E/TH(P)/EE/E/KDI/F.DPR/P.O.NO.3/D.3/2016

- 1 -

SEA WATER ANALYSIS

S.No. Parameters Value (ppm)

1. Total Solids 35,000

2. Dissolved solids 21,620

3. Suspended Solids 580

4. Ignited residue 17,500

5. Volatiles Solids 4,700

6. Acid Insolubles 112

7. Chlorides (as Cl) 20,232

8. Sulphates (as SO4) 1,457

9. Iron (as Fe) 70

10. Total alkalinity (as CaCO3) 525

11. Alkalinity due to Normal Carbonates (as CaCO3) Nil

12. Alkalinity due to bi-Carbonates (as CaCO3) 525

13. Total hardness (as CaCO3) 8,155

14. Permanent hardness (as CaCO3) 6,200

15. Temporary hardness (as CaCO3) 1,955

16. Calcium hardness (as CaCO3) 1,255

17. Magnesium hardness (as CaCO3) 6,900

18. PH 8.2

�

F

easi

bilit

y R

epor

t

for

5 x

800

MW

Kad

alad

i Sup

er C

ritic

al

T

herm

al P

ower

Pro

ject a

t Kad

alad

i Tal

uk,

Ram

anat

hapu

ram

Dist

rict,

Tam

il N

adu.

A

nnex

ure

– 3.

2 Sh

eet 1

of 2

Jo

b N

o: 1

5Z03

5x80

0 M

W-K

SCTP

P-FR

-TA

NG

EDC

O

E/TH

(P)/E

E/E/

KD

I/F.D

PR/P

.O.N

O.3

/D.3

/201

6

ES

TIM

AT

ION

OF

CO

NS

UM

PT

IVE

WA

TE

R R

EQ

UIR

EM

EN

T

Sl.

No.

C

onsu

mpt

ion

Poin

ts

Des

alin

ated

Pro

duct

wat

er u

sage

(m

3 /hr

) Se

a w

ater

usa

ge (m

3 /hr

)

DM

W

ater

(m

3 /hr)

Pota

ble

Wat

er

(m3 /h

r)

Serv

ice

wat

er

(m3 /h

r)

Des

alin

atio

n fe

ed w

ater

(m

3 /hr)

CT

Mak

eup

wat

er

(m3 /h

r)

Elec

tro-

chlo

rina

tion

feed

wat

er

(m3 /h

r)

Rem

arks

1.

a. H

eat C

ycle

Mak

e-up

b.

Mak

e-up

Req

uire

men

t for

C.C

.C.W

Sys

tem

c.

Che

mic

al F

eed

Syst

em

d. H

2 G

ener

atio

n Pl

ant

e. C

onde

nsat

e po

lishi

ng u

nit

f. R

egen

erat

ion

of D

M P

lant

e.

Rej

ect f

rom

BW

RO

125

10

10

15

10

10

60

@

1%

mak

e-up

Sub-

Tota

l (a

to e

) 24

0

240

2.

a.

Pot

able

Wat

er R

eqm

t. fo

r Pla

nt

b. P

otab

le w

ater

Req

mt.

For T

owns

hip

7 13

Sub-

Tota

l (a

)

20

20

F

easi

bilit

y R

epor

t

for

5 x

800

MW

Kad

alad

i Sup

er C

ritic

al

T

herm

al P

ower

Pro

ject a

t Kad

alad

i Tal

uk,

Ram

anat

hapu

ram

Dist

rict,

Tam

il N

adu.

A

nnex

ure

– 3.

2 Sh

eet 2

of 2

Jo

b N

o: 1

5Z03

5x80

0 M

W-K

SCTP

P-FR

-TA

NG

EDC

O

E/TH

(P)/E

E/E/

KD

I/F.D

PR/P

.O.N

O.3

/D.3

/201

6

3.

a. S

ervi

ce W

ater

b.

AH

P (C

oolin

g &

Sea

ling)

c.

ASH

Con

ditio

ning

d.

HV

AC

pla

nt m

akeu

p e.

To

Fire

pro

tect

ion

syst

em

f. FG

D s

yste

m m

akeu

p g.

FG

D L

imes

tone

slur

ry p

repa

ratio

n h.

CH

P D

ust S

uppr

essi

on

100

200

20

50

20

1500

60

55

+55

m3 /

hr to

CH

P D

S

+60

m3 /

hr re

cycl

ed fr

om F

GD

+45

m3 /

hr re

cycl

ed fr

om E

TP

Sub-

Tota

l (a

to h

)

20

05

2005

3a

D

esal

inat

ed p

rodu

ct w

ater

requ

irem

ent (

sub-

tota

ls 1

+ 2

+ 3

) 22

65 m

3 /hr

3b

Recy

clin

g of

Per

mea

te w

ater

from

ETP

RO

pl

ant

245

m3/

hr

3c

Tota

l Des

alin

ated

pro

duct

wat

er re

quir

emen

t (s

ub-to

tals

3a

– 3b

) 20

20 m

3/hr

4.

a. 4

8.5

MLD

Des

alin

atio

n pl

ant r

ejec

t wat

er

b. U

ltra-

filtr

atio

n re

ject

c.

Cla

rifie

r slu

dge

wat

er

d. C

lear

wat

er re

cycl

ed b

ack

from

Slu

dge

hand

ling

plan

t

30

30

561

174

742

Sub-

Tota

l 4 (a

to c

) - 4

(d) +

3c

50

43

5.

C

T M

akeu

p w

ater

33

125

6.

Si

de s

trea

m fi

lters

bac

kwas

h sl

udge

was

te

650

7.

Elec

tro-

chlo

rina

tion

plan

t fee

d w

ater

375

G

RA

ND

TO

TAL

(sub

tota

ls o

f 4+5

+6+7

)

3919

3 38

5 C

usec

With

5%

mar

gin

41

150

404

Cus

ec

Not

e: T

he a

bove

val

ues a

re in

dica

tive

and

subj

ect t

o ch

ange

as p

er B

idde

r’s r

equi

rem

ent d

urin

g de

tail

engi

neer

ing

stag

e.

Feasibility Report




- 1 -

ANALYSIS OF IMPORTED COAL (AS RECEIVED BASIS)

PROXIMATE ANALYSIS

COMPONENT (% BY WEIGHT)

Moisture 16.50

Volatile Matter 36.45

Ash 6.62

Fixed Carbon 40.43

Total 100.00

ULTIMATE ANALYSIS

Carbon 60.12

Hydrogen 4.38

Nitrogen 1.48

Oxygen 10.37

Sulphur 0.53

Ash 6.62

Moisture 16.50

Carbonates -

Phosphorous -

Others -

Total 100.00

Gross Calorific Value - 5642Kcal/Kg

HGI - 51

Feasibility Report




- 2 -

ANALYSIS OF INDIGENOUS COAL (AS RECEIVED BASIS)

PROXIMATE ANALYSIS

COMPONENT (% BY WEIGHT)

Moisture 16.00

Volatile Matter 19.00

Ash 45.00

Fixed Carbon 20.00

Total 100.00

ULTIMATE ANALYSIS

Carbon 27.70

Hydrogen 2.60

Nitrogen 0.52

Oxygen 7.26

Sulphur 0.50

Ash 45.00

Moisture 16.00

Carbonates 0.38

Phosphorous 0.04

Others -

Total 100.00

Gross Calorific Value - 2800Kcal/Kg

HGI – 45 to 55

Feas

ibili

ty R

epor

t

for

5 x

800

MW

Kad

alad

i Sup

er C

ritic

al

T

herm

al P

ower

Pro

ject a

t Kad

alad

i Tal

uk,

Ra

man

atha

pura

m D

istric

t, Ta

mil

Nad

u

A

nnex

ure

– 4.

1 Sh

eet 1

of

3

Jo

b N

o: 1

5Z03

5x80

0 M

W-K

SCTP

P-FR

-TA

NG

EDC

O

E/TH

(P)/E

E/E/

KD

I/F.D

PR/P

.O.N

O.3

/D.3

/201

6

S

ITE

-A

Loca

tion

: K

adal

adi,

Ram

anat

hapu

ram

Dis

tric

t C

onne

ctiv

ity to

Site

:

The

site

is 5

km fr

om S

eval

patti

-Tha

raku

di d

istr

ict r

oad

Wat

er S

ourc

e :

Gul

f of M

anna

r

Gri

d C

onne

ctiv

ity

: TA

NTR

AN

SCO

Coa

l C

onne

ctiv

ity

: Fr

om T

hoot

huku

di p

ort

by R

ail

S.n

o N

ame

of t

he

Vil

lage

Pro

pose

d A

rea

Tot

al A

rea

in H

a P

orom

boke

Lan

d in

Ha

Pat

ta L

and

in H

a

Dry

W

et

1.

Kon

dana

llam

patti

19

.9.5

78

4.67

.0

___

803.

86.5

T

O T

A L

:

19

.9.5

784

.67

___

80

3.86

.5

This

site

was

not

con

side

red

furt

her f

or:

1.

The

inta

ke c

orri

dor o

ver l

and

to b

e ta

ken

alon

g si

te-2

and

the

dist

ance

wor

ks o

ut to

aro

und

10km

. 2.

The

site

has

max

imum

agr

icul

tura

l lan

d.

3.Th

e si

te h

as fe

w h

abita

ts w

hich

are

like

ly to

cau

se R

&R

issu

es.

Feas

ibili

ty R

epor

t

for

5 x

800

MW

Kad

alad

i Sup

er C

ritic

al

T

herm

al P

ower

Pro

ject a

t Kad

alad

i Tal

uk,

Ra

man

atha

pura

m D

istric

t, Ta

mil

Nad

u

A

nnex

ure

– 4.

1 Sh

eet 2

of

3

Jo

b N

o: 1

5Z03

5x80

0 M

W-K

SCTP

P-FR

-TA

NG

EDC

O

E/TH

(P)/E

E/E/

KD

I/F.D

PR/P

.O.N

O.3

/D.3

/201

6

SIT

E-B

Lo

catio

n :

Kad

alad

i, Ra

man

atha

pura

m D

istr

ict

Con

nect

ivity

to S

ite

: By

Roa

d, 1

Km

from

Eas

t Coa

st R

oad

Wat

er S

ourc

e :

Gul

f of M

anna

r G

rid

Con

nect

ivity

:

TAN

TRA

NSC

O

Coa

l C

onne

ctiv

ity

: Fr

om T

hoot

huku

di p

ort

by R

ail

S.n

o N

ame

of t

he

Vil

lage

Pro

pose

d A

rea

Tot

al A

rea

in H

a P

orom

boke

L

and

in H

a P

atta

Lan

d in

Ha

Dry

W

et

1.

Thar

aiku

di

___

401.

91.5

__

_ 40

1.91

.5

2.

Kan

nira

japu

ram

230.

26.0

__

_ 23

0.26

.0

3.

Nar

ippa

iyur

4.

41.5

26

5.77

.0

___

270.

18.5

T O

T A

L :

4

.41.

5 89

7.94

.5

___

90

2.36

.0

This

site

has

bee

n co

nsid

ered

as

best

sui

tabl

e du

e to

: 1.

Pr

ojec

t are

a is

spr

ead

over

3 v

illag

es a

nd th

e or

ient

atio

n is

com

pact

in n

atur

e.m

ostly

bar

ren

part

ly w

ith p

atch

es o

f bus

hes a

nd p

alm

tree

s.

2. A

vaila

bilit

y of

ade

quat

e va

cant

land

with

out a

gric

ultu

re a

nd fr

ee fr

om R

&R

issu

es.T

he o

rien

tatio

n is

com

pact

in n

atur

e 3.

As

the

site

is n

ear t

o se

a sh

ore

(i.e)

abo

ut 2

.3 K

m ,

the

requ

irem

ents

for p

lant

wat

er s

yste

m c

ould

be

easi

ly m

et o

ut. H

owev

er, i

t is

also

re

ason

ably

aw

ay fr

om th

e se

a co

ast i

n co

mpl

ianc

e w

ith C

RZ.

4. T

he s

ite is

nea

r the

pro

pose

d al

ignm

ent o

f B.G

. Rai

lway

line

from

Kan

yaku

mar

i to

Kar

aiku

di a

nd h

ence

it w

ill fa

cilit

ate

tran

spor

t of c

oal

from

Tut

icor

in p

ort t

o si

te.

5. T

he s

ite is

nea

rer t

o th

e ex

istin

g Ea

st c

oast

road

6.

The

pro

ject

site

and

the

inta

ke /

out

fall

loca

tion

is 1

1km

& 1

2km

aw

ay f

rom

the

Upp

u Th

anni

Thi

vu Is

land

in

Gul

f of M

anna

r. Th

e te

ntat

ive

corr

idor

rout

e an

d la

nd fa

ll po

int i

s in

dica

ted

in th

e D

RG.1

5ZO

3-00

4-D

WG

-M-0

03, t

he te

ntat

ive

area

for t

he c

orri

dor i

s ar

ound

12

acre

s.

Feas

ibili

ty R

epor

t

for

5 x

800

MW

Kad

alad

i Sup

er C

ritic

al

T

herm

al P

ower

Pro

ject a

t Kad

alad

i Tal

uk,

Ra

man

atha

pura

m D

istric

t, Ta

mil

Nad

u

A

nnex

ure

– 4.

1 Sh

eet 3

of

3

Jo

b N

o: 1

5Z03

5x80

0 M

W-K

SCTP

P-FR

-TA

NG

EDC

O

E/TH

(P)/E

E/E/

KD

I/F.D

PR/P

.O.N

O.3

/D.3

/201

6

SIT

E-C

Lo

catio

n :

Kad

alad

i, Ra

man

atha

pura

m D

istr

ict

Con

nect

ivity

to S

ite

: Th

e si

te is

aro

und

2km

from

EC

R W

ater

Sou

rce

: G

ulf o

f Man

nar

Gri

d C

onne

ctiv

ity

: TA

NTR

AN

SCO

C

oal

Con

nect

ivity

:

From

Tho

othu

kudi

por

t by

Rai

l

S.n

o N

ame

of t

he

Vil

lage

Pro

pose

d A

rea

Tot

al A

rea

in H

a P

orom

boke

Lan

d in

Ha

Pat

ta L

and

in H

a

Dry

W

et

1.

Val

inok

kam

2.

89.0

52

1.20

.5

___

524.

09.5

2.

Sira

ikku

lam

4.

76.0

30

1.07

.5

___

305.

83.5

T

O T

A L

: 7.

65.0

82

2.28

.0

___

82

9.93

.0

This

site

was

not

con

side

red

for:

1.Th

e pr

ojec

t site

and

the

inta

ke is

5.5

km fr

om th

e G

OM

NP

Kee

laka

rai z

one.

2.

The

Inta

ke/o

utfa

ll lo

catio

n w

ith re

spec

t to

the

site

loca

tion

will

be

in c

lose

pro

xim

ity w

ith th

e G

OM

NP.

3.

The

proj

ect s

ite so

uthe

rn p

art o

verl

aps w

ith 5

00m

HTL

. 4.

The

site

has

som

e ag

ricu

ltura

l lan

d an

d ha

bita

t whi

ch m

ay c

ause

R&

R is

sues

.



Job No: 15Z03


-1-

1. Turbine Generator & Auxiliaries

� Type : Single/double reheat multi cylinder tandem compound, Condensing steam turbine directly driving a 3000 rpm, 2-pole, 50 Hz, synchronous generator.

� Nominal Capacity : 800,000 kW

� Normal Operating Frequency : 47.5 to 51.5 Hz Range

� Inlet Steam Parameters: - Main Steam Hot Reheat

• Pressure, bar (abs.) : 255 54 • Temperature, �C : 565 593 • Steam flow at MCR t/hr. : 2510 * (approx.)

� Exhaust Pressure : 77 mm of Hg (abs.)

� Steam Extractions : CRH + 5 to 7 Nos. stages from HP, IP and LP turbines for condensate/ feed water heating (depends on manufacturer).

� Type of governing : Electro-hydraulic governing with fire resistant fluid.

� Turbine HP-LP bypass system : Capacity : 60% of BMCR (or lower capacity commensurate with mini-mum main steam flow correspond-ing to



Job No: 15Z03


-2-

sustained rated main steam temp.)

� Condensing Equipment : Shell and tube type, surface condenser, of single/double flow design operating on re-circulating cooling water with evaporative cooling towers.

� Regenerative feed heating : Three / four stages of LP heat arrangement (U-tube design). One spray-

cum-tray type deaerator, two parallel chains of HP heaters.

� Boiler feed water pumps : 2x50% capacity steam turbine-driven BFP with booster pump & 1x50 % electric motor driven, horizontal, centrifugal BFP.

� Condensate extraction pumps : 3x50% capacity vertical, centri-fugal CAN type construction, 3.3 kV motor driven.

� Generator : 945,000 kVA output at 0.85 power factor (lagging) 3 pH, 50 Hz at 27 kV voltage.

2. Steam Generator & Auxiliaries

� Type : Pulverized fuel, once through, two-pass/tower type, semi-outdoor type, dry bottom, coal-fired unit prefe-rably with tangential firing and with associated auxiliaries suitable for both constant pressure and sliding mode operation.



Job No: 15Z03


-3-

� Nominal Outlet Steam Parameters at BMCR :-

Main Steam Hot Reheat

� Pressure (bar (a)) : 259.5 55.6 � Temperature, �C : 569 596 � Steam flow, t/hr. (approx.) : 2710 *

- Steam temp. control range: 40-100% BMCR or better.

- Super-heater/Re-heater : Attemperation and tilting burner

temperature control control.

� Nominal Air Heaters Capacity : 2 x 60% of BMCR.

� Draft Fans : � 2x60% capacity axial flow forced draft (FD) fans with blade pitch control with VFD.

� 2x60% capacity axial induced draft (ID) blade pitch control fans with variable frequency drive.

� 2 x 60% capacity P.A. Fans.

� Pulverizing Mills : Slow speed large bowl e type in **N+2 configuration.

� Coal Firing System : Direct suspended firing with state-of-the-art low NOXburners giving stable fire between 40-100% MCR or better.

� Start-up/Auxiliary Fuel : Light Diesel Oil/HSD for cold start and for support (capacity up to 10% BMCR).

Heavy Fuel Oil (HFO) for flame support upto 40% of BMCR.



Job No: 15Z03


-4-

� Ash Removal : Dry extraction and disposal for Bottom Ash and dry extraction and dry disposal of fly ash to silos. Provision would be kept for Bottom Ash and Fly Ash disposal in Lean mode to ash pond.

Note : *Vendor to specify. **N-denotes the number of mills required to reach boiler MCR with

design coal and 85% mill loading.

3. Plant Water System :

Intake Sea Water Pumps:

� Source : From Gulf of Mannar.

� Type : Vertical wet pit mixed flow multi-stage.

� Fluid Handled : Sea water

� Capacity : 10300 m3/hr (each)

� Head : To be decided at detail engineering stage.

� Suspension Height : To be decided at detail engineering stage.

� Number : Six(6) [4 working + 2 standby)

� Drive : Electric motor, 415 V, 3 Ph., 50 Hz.

Clariflocculator:

� Type : Clarifier with concentric flocculator.

� Capacity : 1390 m3/hr (each).

� Number : five(5), overall 120% capacity.



Job No: 15Z03


-5-

� Construction : RCC

Clarified Water Storage Tank:

� Type : RCC (Partly underground) twin-chamber

� Capacity : 8 hours (overall)

Ultrafiltration system:

� Feed flow : 5611 m3/hr

� Recovery : 90% (min)

� Flux : > 60 LMH

Desalination (SWRO) plant:



� Outlet TDS : < 500 ppm

� Flux : 25 LMH (max)

Product / Desalinated water cum fire water storage tank:

� Type : RCC, Semi-underground partitioned.

� Capacity : 24 hours (overall)

� Number : One(1)

BWRO-DM plant: (i) BWRO plant:





Job No: 15Z03


-6-

� Outlet TDS : To suit supercritical boiler heat cycle makeup system

(ii) DM plant:

� No. of streams : Three (3) (2W+1S)

� Feed flow : 90 m3/hr (each)

� Control Room : Indoor

� Capacity : Three(3) streams of 90 m3/hr, each stream consisting of mixed bed exchanger. The system would also include acid and alkali handling and storage facilities for exchanger regeneration.

� Operation : PLC based from control room.

DM Water Storage Tanks:

� Type : Vertical cylindrical steel tank with inside rubber lining.

� Capacity : 1100 m3

� Numbers : Four (4)

Condensate Storage Tank:

� Type : Vertical steel tank with inside rubber lining.


� Numbers : Five (5)



Job No: 15Z03


-7-

Cooling Water Circuit:

Cooling Tower:-

� Type : Natural Draft

� Nos. : Five (5)

� Cooling Water Quality : Sea water

� Total circulating water flow : 92,800 m3/hr. (approx) per unit

� Design cooling range : 42.5 °C to 32.5 °C i.e. 10 °C

� Approach : 5 °C

Circulating Cooling Water Pumps:-

� Type : Vertical wet pit installation.

� Fluid Handled : Sea water

� Capacity : 45,000 m3/hr. each (approx)

� Head : To be decided during detail engineering stage.

� Number : Fifteen (15) [2W + 1S per unit].

Auxiliary Cooling Water Pumps:-

� Type : Vertical wet pit installation.

� Flow : 10,000 m3/hr. each (approx)

� Fluid : Sea water

� Number : Ten(10) [1W + 1S per unit].

Auxiliary DM Closed Cycle Cooling Water Pumps:-� Type : Horizontal volute casing, indoor.

� Flow : 850 m3/hr. each (approx)

� Head : 60 mlc

� Fluid : DM water

� Number : Four(4) [3 working + 1 standby] per unit.



Job No: 15Z03


-8-

Plate Type Heat Exchanger:-

� Primary Coolant : DM water

� Flow : 2600 m3/hr. (approx)

� Secondary Coolant : Sea water

� Flow : 3500 m3/hr. (approx)

� Plate Material : AISI 316 � Number per unit : Four(4) (3 working + 1 standby) per

unit.

Side stream filtration:

� Capacity in m3/hr : To be decided by bidder to meet TSS discharge norms of <100 ppm at sea outfall.

� Suspended Solids in CW & ACW circuit : < 2 NTU

ETP RO plant: (to achieve zero waste water discharged) RO plant:



� Outlet TDS : < 150 ppm

4. Coal Handling Plant

Conveying System :

� Type : Twin stream conveying system

� Capacity : Rail wagons handling & stacking system 4500 TPH and two independent conveying twin stream system (for conveying to coal bunker) for unit 1,2,3 & unit 3,4 with capacity each 2000 TPH



Job No: 15Z03


-9-

Stacker-cum-Reclaimer :-

� Type : Electric-driven rail-mounted rever-sible having slewing and adequate lifting arrangement.

� Stacking Capacity : 4500 TPH

� Reclaiming Capacity : 2000TPH

� Number : Four(4)

5. Solid Waste Handling System Equipment

Ash Handling System:

� Basic Design Parameters : Max. Bottom Ash generation 22 Tons per hour per boiler.

Max. Fly Ash generation – 87 TPH per boiler.

� Type : Dry extraction and disposal for Bottom Ash and dry extraction and dry disposal of fly ash to silos. Provision would be kept for Bottom Ash and Fly Ash disposal in Lean mode to ash pond.

� Bottom Ash cleaning : Dry Ash Extractor.

� Fly Ash cleaning : Auto-sequential operation with 4.5 hours of operation per shift.

6. Fuel Oil System Oil System

LDO Storage Tanks:


� Number : Two(2)



Job No: 15Z03


-10-

LDO Unloading/Transfer Pump:

� Type : Positive displacement.

� Number : Two(2) [1 working + 1 standby]

HFO Storage Tanks :


� Number : Two(2)

HFO Unloading/Transfer Pump :

� Type : Positive displacement.

� Number : Two(2) [1 working + 1 standby]

7. Auxiliary Equipment:

Turbine Hall EOT Crane :

Capacity:-

� Main Hook : 275 Tons

� Auxiliary Hook : 55Tons

� Number : Four(4)

Elevators:

� Type : Cabin type, driven by coil rope drum, electric drive

� Location & Number : Boiler Area - 5 Power House - 5 Stack - 3



Job No: 15Z03


-11-

Fire Protection System: Fire Hydrant System:-

� Type : Pressurised piping network both under-ground and overground kept pressurised by hydro-pneumatic tank and jockey pump etc. with hydrant valves as per the requirements of Tariff Advisory Committee (TAC) of National Insurance Association of India.

� Hydrant Pumps : Three(3) nos.(2 electric motor driven + 1 DG driven).

Air Compressor:

� Type : Screw type.

� Number : 12 (IA-6 (5W+1S) & PA-6(5W+1S) )

� Free air capacity at normal: 55 Nm3/min. each pressure and temperature

� Rated discharge pressure : 8.0 kg/cm2) (g)

� Location : Indoor

� Assumed inlet air temp. : 45 °C (max.)

� Air Receiver : One(1) per compressor.

� Air Drying Plant : One stream of capacity 55 Nm3/min. fully automatic type for each compressor.

Airconditioning System:

Central Control Room:-

� Type : Central chilled water plant with high and low side equipment.

ESP Control Room :-

� Type : Direct Expansion



Job No: 15Z03


-12-

DM Plant :-

� Type : Direct Expansion

CHP Control Room :-

� Type : D-X type

� Other areas : Packaged Airconditioning units.

Ventilation System:

Powerhouse Building:-

� Type : Air washer unit with centrifugal fans.

ESP Switchgear & MCC Room:-

� Type : Unitary air filtration with centrifugal fan.

Hydrogen Generation Plant:

� Type : Bipolar Electrolytic module.

� Electrolyte : KOH

� Capacity : 2 units of 10 m3/hr.

� Accessories : Bottling arrangement of H2 in cylinders.

Turbine Oil Purification Unit:

� Type : Centrifuge Type.

� Capacity : 20% per hour of total oil in TG network.

Condensate Polisher:

� Type : Ion Exchange type.

� Capacity : 100% of condensate flow per unit with by-pass. Four(4) units of mixed bed exchange (3 W + 1 S) per unit.



Job No: 15Z03


-13-

On-Load Condenser Tube Cleaning System:

� Type : Continuous, sponge rubber ball type with ball recirculation arrangement.

� Capacity : Ball recirculation pump with drive, ball collectors and regulators, automatic ball sorters, ball collecting strainers, debris filters, piping, valves etc.

�

Feasibility Report




- 1 -

LIST OF BASIC EQUIPMENT/INSTRUMENT FOR ENVIRONMENTAL MONITORING & TESTING

1. Respirable Dust Sampler 2. Stack Monitoring Kit 3. Spectro-Photometer 4. Single Pan Balance 5. pH Meter 6. BOD Incubator 7. Air Oven 8. Water Distillation Assembly 9. D.O. Meter 10. Orsat Apparatus 11. Kjeldahl Nitrogen Assembly 12. Gas Liquid Chromatograph 13. Standard Laboratory Equipment and Appliances 14. Continuous weather monitoring station (for monitoring

of wind speed, wind direction, air temperature, R.H. solar radiation and rainfall)

15. Atomic Absorption Spectrophotometer

SL.NO PROJECT COMPLETION COST RS, LAKHS ANNEX.NO1 PRELIMINARY EXPENSES 375.00 15.1-FORM-5B2 LAND COST 4000.00 15.1-FORM-5B3 CIVIL/ CONSTRUCTION COST 195666.91 15.1-FORM-5B4 MAIN PLANT COST

MECHANICALELECTRICAL & C&I

5 ESTABLISHMENT CHARGES 41647.36 15.1-FORM-5B6 TRAINING 100.00 15.1-FORM-5B7 TOOLS & TACKLE 20823.68 15.1-FORM-5B8 CONTIGENCIES 41647.36 15.1-FORM-5B9 AUDIT & ACCOUNTS 5205.92 15.1-FORM-5B10 SITE SUPERVISION 1960.00 15.1-FORM-5B11 FINANCIAL CHARGES 10727.33 15.1-FORM-5B

1871826.11 15.1-FORM-5B

12 CONSULTANCY CHARGES 5205.92 15.1-FORM-5B13 CONSTRUCTION INSURANCE 2663.76 15.1-FORM-5B14 START UP FUEL 975.00 15.1-FORM-5B15 LOSSES ON STOCK 5205.92 15.1-FORM-5B16 IDC 392612.46 15.1-FORM-5B17 WORKING CAPITAL MARGIN MONEY 63022.27 15.1-FORM-5B18 OPTIONAL PACKAGES 408600.00 15.1-FORM-5B19 CSR 10500.00 15.1-FORM-5B

TOTAL PROJECT COST 3082765.00

COST PER MW 770.69

DEBT/EQUITY 70.30DOMESTIC LOAN 2164304.82FOREIGN LOAN 0.00EQUITY 918460.19TOTAL 3082765.00

kadaladi taluk, ramanathapuram district, tamil...

Documents