Takaharu FUKUZAKI, Dr. Eng.Professor, Department of Nuclear Engineering and Management,

Graduate School of Engineering, The University of Tokyo7-3-1Hongo, Bunkyo-ku, Tokyo, 113-8656, JAPAN

fukuzaki@nuclear.jp

Technology Innovationin

Instrumentation and Control Systemfor

Nuclear Power Plant

1

1. Introduction2. Core Operation and Management System (COMS) for Nuclear Power Plant3. Computer-Based Console for Nuclear Power Plant Trial (COCONUT)4. Lessons Learned from R&D Experience5. Conclusion

Contents

2

Introduction

BWR Core Performance Calculation System[BWR: Boiling Water Reactor] On-line monitoring of power distribution in

reactor core by physical-model-based simulation program

World leading &EPRI collaboration

Achievement #1

3

Introduction

ABWR Instrumentation and Control System[ABWR: Advanced BWR] Enlargement of automatic operation

Digitalization of control consoleOne-man control

prototype console 　

Achievement #2

4

Core Performance Calculation ProgramConstitution

5

Core Performance Calculation ProgramFlowchart and Models

6

Core Performance Calculation ProgramAdaptive capability

7

Core Performance Calculation ProgramParameter optimization

8

Core Performance Calculation ProgramPower correction factor calculation

9

Core Performance Calculation ProgramControl rod dependent power correction

10

Core Performance Calculation ProgramPredicting mode calculation

11

Core Performance Calculation ProgramEvaluation of thermal power prediction

12

Core Performance Calculation Program Evaluation of power distribution

13

14

Transition of Man-Machine Interfacesin Main Control Room

Conventional

Improved Advanced

(Monitoring)(Decision)(Operation) (Monitoring)(Decision)(Operation) (Monitoring)(Decision)

Operator Operator Operator

Conventional I&C Conventional I&CAdvanced

Device

Plant Process Plant Process Plant Process

Enlarged Automation

Primary Sys.

Automation

15

NUCAMM-90(NUCAMM: Nuclear Power Plant Complex with Advanced Man-Machine Interface)

16

Selection of Important Alarmsduring Plant Transient

17

Systematic Problem SolvingInfinite Final Solution

CurrentStage 1st

Stage

2ndStage

CurrentStage

InfiniteFinal Solution

(F-1)thStage

InfiniteFinal Solution

(F-2)thStage

1stStage

You might lose the way.

You might be embarrassed by moving targets.

Which approach is preferable ?

You might be required a little bit more effort and imagination.

You can easily find the way.

18

Systematic Problem Solving Technology Evolution S-curve

Every technology evolutes in S-curve. Technology transfer is inevitable to reach higher degree.

Focus of invention is dependent on S-curve position.

To minimize cost

To increase reliability

To increase efficiency

To increase performance

To operate stably

To be operable

Degree of

ideality

Time(1) Idea

(2) Birth

(3) Infant / Growth

(4) Mature

(5) Retirement

Two achievements were introduced: BWR Core Performance Calculation System for on-line monitoring of power distribution in reactor core by physical-model-based simulation program ABWR Instrumentation and Control System for enlargement of automatic operation, and digitalization of control console

Conclusion

19

Two approaches of Systematic Problem Solvingin Technology Innovation were proposed: to search from GOAL to START to recognize Technology Evolution S-curve