regulation & safety requirements
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7/28/2019 Regulation & Safety Requirements
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EDF / SEPTEN1
Regulation and
Safety requirements
for civil structures
Pierre.Pierre.lazzarinilazzarini@@edfedf..frfr
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EDF / SEPTEN2
Regulation and safety requirementsfor civil worksRegulation and safety requirementsfor civil works
1. Regulation : Laws / decrees / standards / codes
The regulation in France
A quick look at US and UK
2. Safety requirements
General considerations about civil works
Safety requirements for civil works in EPR
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EDF / SEPTEN3
1. Regulation
The regulation in France
A look at UK & US situationA look at UK & US situation
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General architecture of regulationGeneral architecture of regulation
Laws
Decrees,departmentalordersASNdecisions
RFSfundamentalsafetyrulesASN guidesTechnicalDirectives
DesignandConstruction codesStandards
Internaltechnicalrules
legislative
field
Regulatory
field
Standardisation
field
Parliament
Executive
power
Industry
General applicationCompulsory
Technically specificPossible deviations
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Laws and decreesLaws and decrees
TSN LAW (J une 16th 2006)
} TSN = Transparency and Security in Nuclear field
} TSN Law unifies previous laws and decrees
} Completed by several decrees which provide for application details
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Laws and decreesLaws and decrees
TSN LAW (J une 16th 2006)
} Create ASN :
y Independent regulatory authority
y With a large power :
y Technical and regulatory decisions
y Control of nuclear facilities
y Public information
y Management of emergency situations
y Technical enquiries
y Advices and recommendations to the Government
y Licensing of nuclear facilities
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Laws and decreesLaws and decrees
TSN LAW (J une 16th 2006)
} Security in Nuclear field is defined as :
1. Nuclear safety
2. Radioprotection
3. Prevention, mitigation of malicious acts
4. Organisation of public safety in case of accident
} Protected stakes :
1. Public safety
2. Public health
3. Public healthiness
4. Nature and environment protection
Civil Eng. Concerned
Civil Eng. Concerned
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EDF / SEPTEN8
Laws and decreesconcerning Civ. Eng
.
Laws and decreesconcerning Civ. Eng.
RTGE Decree (Dec. 31th 1999)
} RTGE = Environmental General Technical Regulation
} Prevention and mitigation of non-nuclear environmental impacts
1. Noise and vibrations
2. Atmospheric pollution prevention
3. Prevention of water pollution
4. Waste management
5. Fire risks
6. Nuclear risks
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EDF / SEPTEN9
Laws and decreesconcerning Civ. Eng
.
Laws and decreesconcerning Civ. Eng.
Regulation about working conditions and protection of workers health
} Radio protection
} Fire protection and fire escape routes
} Etc
Quality Decree (1984)
} Related to Quality Assurance in Nuclear activities
Others .
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EDF / SEPTEN10
RFS and ASN guidesRFS and ASN guides
RFS & ASN Guides
} RFS = Fundamental Safety Rule. The latest ones are named "Guides"
} Issued by ASN
What are they ?
} Dedicated to a specific technical field
} Fix safety objectives
}
Define technically acceptable practice} Reflect the state of knowledge at the date of issue Possible
evolutions
}
Possibility of deviations : with adequate justification that safetyobjectives are met
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EDF / SEPTEN11
RFS and ASN guidesRFS and ASN guides
RFS & ASN Guides concerning Civ. Eng.
} RFS I.2.a. Aircraft crash risks (August 1980).} RFS I.2.b. Turbine missile risks (Agust1980).
} RFS I.2.d. Risks in connection with industrial environment and transportways (May 1982).
} RFS I.2.e. external flooding risk (April 1984).
} RFS I.3.b. Seismic instrumentation (J une 1984).
} RFS I.3.c.Geological and geotechnical surveys (August 1985).
} RFS IV.l.a. Classification of mechanical components, electrical systems,civil structures and buildings (December 1984).
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EDF / SEPTEN12
RFS and ASN guidesRFS and ASN guides
RFS & ASN Guides concerning Civ. Eng.
} RFS-V.2.b. General design and construction code for civil works (rf.:code RCC-G), (J uly 1981).
} RFS-V.2.f Fire protection (rf.: code RCC-I), (December 1982).
}
RFS-V.2.g. Seismic calculations of civil works (December 1985).} RFS-V.2.h. General design and construction code for civil works (rf.:
code RCC-G), (J une 1986).
} RFS-V.2.j.Fire protection (November 1988).
} RFS 2001-01 : Seismic ground motion (May 2001)
} ASN Guide 2-01 : Seismic calculations of civil works (2002)
D i & t tiDesign & construction
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EDF / SEPTEN13
Design & constructioncodesDesign & constructioncodes
Requested by French authorities at the beginning of the nuclearprogram:
} Formalization of technical rules specifications applicable to design andconstruction of PWR in France
Written by EDF in cooperation of independent experts
Objectives
} Facilitate the technical instructions with ASN
}
Simplify the contractual technical relation between EDF and contractors,} A set of documents representing the technical French practice
(exportation China, Korea, South Africa)
}
Some of them approved by ASN through RFS
Design & constructionDesign & construction
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EDF / SEPTEN14
Design & constructioncodesDesign & constructioncodes
List of codes connected to Civil engineering and construction
} RCC-G (1981) = Design and Construction Code Civil structures CPY - 900MW PWR
} RCC-G (1985) = Design and Construction Code Civil structures
P4 P'4 N4 1300 / 1450 MW PWR
} ETC-C = EPR Technical Code Civil structures
} RCC-I (1987) = Design and Construction Code Fire protection N4
} ETC-F = EPR Technical Code Fire protection
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EDF / SEPTEN15
A quick look at US and UK situationA quick look at US and UK situation
In the US
}A comprehensive set of codes, guides and standards :
y ACI codes 349 and 359 (civil engineering)
y ASME code
In the UK
}Only general documents
y SAPs : Safety Assessment Principles
y Safety case based on ALARP approach
}The designer, or the Nuclear Utility, can chose its codes and standards,but must prove that the design complies with SAPs,
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EDF / SEPTEN16
2. Safety requirementsfor civil structures
./ General considerations on civil worksfunctions
./ EPR case study
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EDF / SEPTEN17
2. Safety requirements
for civil structures
./ General considerations on civil worksfunctions
i f i il i f
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EDF / SEPTEN18
Functions of civil structures in Nuc. safetyFunctions of civil structures in Nuc. safety
Bearing and protectionof safety related and
safeguard systems
Reactivity control
Bearing and protectionof safety related and
safeguard systems
Power dissipation
Fuel casing1st barrier
Primary Circuit / Reactor vessel
2nd barrier
Containment wall
3rd barrier
Bearing and protection
of safety related and
safeguard systems
Radioprotection
radioactivity confinment
3 barriersSafety functions
Nuclear Fuel
Fuel Casing
Reactor Vessel
Containment Wall
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EDF / SEPTEN19
Main requirements for Civil Struc.Main requirements for Civil Struc.
Main requirements related to Safety Functions
}Stability
}Equipment bearing
}Tightness
}Containment
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EDF / SEPTEN20
Main requirements for Civil StrucMain requirements for Civil Struc
Stability
}Lowest level of requirement = No collapse
Objective not met Objective met
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EDF / SEPTEN21
Main requirements for Civil StrucMain requirements for Civil Struc
Equipment bearing
The civil structures must bear the maincomponents even during and after accidentalsituations.
Limitation of deformation and cracking
i i f Ci il S
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Main requirements for Civil StrucMain requirements for Civil Struc
Tightness (liquids)
}Pools Tanks etc
}Generally obtained bya steel liner
}Sometimes :limitation of cracking
and composite liner
Fuel Building
Spent fuel Pool
Main requirements for Civil StrucMain requirements for Civil Struc
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EDF / SEPTEN23
Main requirements for Civil StrucMain requirements for Civil Struc
Nuclear Fuel
Fuel Casing
Reactor Vessel
Containment Wall
Containment (gaz tightness)Obtained by :
Steel liner
Concrete pre-stressing(drastic reduction of cracking)
containment wall
Limitation of cracking low pressure
Dynamic containment / ventilation depression
M i i t f Ci il StM i i t f Ci il St
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Main requirements for Civil StrucMain requirements for Civil Struc
Criteria severity v/s Requirements severity
Requirements
Criteriaseverity
Stability
Equipment bearing
Liquid tightness
Containment
Oth i tOth i t
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Other requirementsOther requirements
Mechanical protection
Biological protection
}For workers and equipments
Fire protection}Trains segregation
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2. Safety requirementsfor civil structures
./ EPR case study
EPR B ildiEPR Buildings
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EDF / SEPTEN27
EPR BuildingsEPR Buildings
1 . Reactor B.2. Fuel B.
3. Safeguard B.4. Diesel B.5. Nuclear auxiliaries B.6. Waste treatment B.7. Turbine hall
Design assumptions for safetyDesign assumptions for safety
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EDF / SEPTEN28
Design assumptions for safetyassesment
g p yassesment
Categories of operating conditions taken into account for design :
}Referenced operating conditions : PCC1 to PCC4
}Multiple failure operating conditions (RRC-A) and severe accidentconditions (RRC-B)
} Internal hazards
}External hazards
}Conditions taken into account as defence in-depth / design margins :LOCA 2A, LOCA + Earthquake
Design assumptions for safetyDesign assumptions for safety
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g p yassesment
g p yassesment
Referenced operating conditions
}Normal operating conditions = 6 reactor states / PCC1 category
y
Facility lifespan (60 years)
y Ambient conditions (temperature, pressure, irradiation)
y Periodic tests
y Normal climatic conditions
} Incidental & accidental transients = PCC2 to PCC4 categories
y Ambient conditions (temperature, pressure, irradiation)
Design assumptions for safetyDesign assumptions for safety
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g p yassesment
g p yassesment
Operating conditions with multiple failure (RRC-A) and severeaccidents (RRC-B)
}RRC-A conditions are less severe than PCC4 accidental transients Not taken into account
}RRC-B conditions / Severe accidents
y Ambient conditions (Temp. Pressure, Irradiation) + pressure margin
y Hydrogen combustion / deflagration
Internal hazards
y High energy pipes break
y Internal flooding
y Internal missiles & load fall
yFire
Design assumptions for safetyDesign assumptions for safety
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g p yassesment
g p yassesment
External hazards
}Design basis earthquake (DE) & inspection earthquake (or Safe shutdownearthquake / SSE)
}Aircraft crash (APC)
}External explosion
}External flooding & underground water raise
}Exceptional meteorological conditions
Defence in-depth / design margins}LOCA-2A
}LOCA + earthquake
Safety RequirementsSafety Requirements
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Safety RequirementsSafety Requirements
Safety requirements are defined as the list of functional criteria thatmust be guaranteed in each scenario considered in the safetyassessment.
The functional criteria depend of :
}The scenario / situation,
}The element of structure(containment wall pool aircraft shield simple wall )
Standard criteria
Overview of safety requirements in following tables
S = serviceability (stability / component bearing) T = tightness
R = Resistance C = Containment
Safety requirementsSafety requirements
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y qReactor building
y qReactor building
Situations & categoriesInternal
containment
internal
structures
external
containment
/ ACS
foundation
slabACS
containment
linerPenetrations IRWST pool
N Normal situations Sc Sc / Sc / C + Sm C + Sm T
E1 PCC-2 situations Sc Sc / Sc / C + Sm C + Sm T
E2 Inspection earthquake (SSE) Sc Sc Sc Sc Sc C + Sm C + Sm T
E3 Snow & wind / / Sc / Sc / / /
E4 Exceptional temperatures / / Sc / Sc / / /
E5 Underground water / / / T / / / /
E6 Periodic tests Sc / Sc + C Sc / C + Sc C + Sc /
A1 Earthquake (DE) Rc Rc Rc Rc Rc C C T
A2 APC / / Rc Rc Rc / / /
A3 Explosion / Fire / / Rc / Rc / / /
A4 High energy pipe break Rc Rc Rc / / C Rm /
A5 PCC-3/4 - RRC-A Rc Rc / / / C C T
A6 RRC-B Rc Rc C Rc / C C /
A7 LOCA-2A Rc / / Rc / C C /
A8 LOCA + Earthquake Rc / / Rc / C / /
S = serviceability T = tightness R = Resistance C = ContainmentIndex c = concrete Index m = metal
Safety requirementsSafety requirements
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y qNuclear Island & Pumping station
y qNuclear Island & Pumping station
Situations & categories HK / HL2-3 HL1-4 HNPumping
stationHL / RIS HD
N Normal situations Sc (T) Sc Sc / T Sc / Sc
E1 PCC-2 situations Sc (T) Sc Sc / T / Sc /
E2 Inspection earthquake (SSE) Sc (T) Sc Sc / T Sc Sc Sc
E3 Snow & wind / Sc Sc Sc / Sc
E4 Exceptional temperatures / Sc Sc Sc / Sc
E5 Underground water / / Sc / T Sc / Sc
A1 Earthquake (DE) Rc (T) Rc Rc / T Rc Rc Rc
A2 APC / / / Rc Rc Rc
A3 Explosion / Fire / Rc Rc / T Rc / Rc
A4 High energy pipe break / / / / / /
A5 PCC-3/4 - RRC-A Rc / C (T) Rc / C T / Rc / C /
A6 RRC-B / / / / / /
S = serviceability T = tightness R = Resistance C = Containment
Index c = concrete Index m = metalHK = fuel B. HL = Safeguard B. HN = Nuclear auxiliary B HD = Diesel B.
Load combinations 1/2Load combinations 1/2
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Load combinations 1/2Load combinations 1/2
N SituationsPermanent
loadsprestressing
variable
loads
(construction
& operation
External
temperature
Other loads
(climatic,
water temp,
inspectionearthquake)
Internal External
1 Construction X X X X X
2 Normal operation X X X X
3
Normal oper. +
climatic loads X X X X X
4Inspection
earthquakeX X X X
5 Underground water X NC X X
6 Except. water temp. X NC X X
7Except. climatic
loadsX NC X X X
8 Tests X X X
Accidental actions
Normal
situations
Exceptional
situations
Permanent actions Variable actions
Load combinations 2/2Load combinations 2/2
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Load combinations 2/2Load combinations 2/2
N SituationsPermanent
loadsprestressing
variable
loads
(construction
& operation
External
temperature
Other loads
(climatic,
water temp,
inspection
earthquake)
Internal External
9 LOCA X X X
10 LOCA 2B (0.55 MPA) X X X X
11 LOCA 2B (0.65 MPA) X X X X
12High energy pipe
failureX X X X X
13 Internal missile X X X X
14Accidental water
temp.X NC X X
15 Design earthquake X X X X X
16 APC X X X X X
17 External explosion X X X X X
18 Flooding X X X X X X
19LOCA +
D.earthquakeX X X X X X
20D.Earthquake + clim.
Loads
X NC X X
Accidental actions
Accidental
situations
Permanent actions Variable actions
From safety requirements to ETC-CFrom safety requirements to ETC-C
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EDF / SEPTEN37
From safety requirements to ETC CFrom safety requirements to ETC C
ETC-C as a design code
}ETC-C part 1 provides for :
y Detailed load combinations, with safety factors to be applied to the loads
y Criteria on material consistent with safety functional criteria :
admissible strains and stresses, maximum deformation , crack openinglimitation etc
with adequate safety factors.
ETC-C will be presented in a future session.
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2. Safety requirements
for civil structures
./ How the safety requirements impactthe design
2 examples of EPR specificities
Reactor building containmentReactor building containment
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EDF / SEPTEN39
Reactor building containmentReactor building containment
Inner prestressed containment wall
With steel liner
Designed for severe accident :P = 0.65 MPa abs.Temp = 170C
Outer reinforced containment wall( partly ACS)
Depression and leakage controlin between
Aircraft crash protectionAircraft crash protection
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EDF / SEPTEN40
Aircraft crash protectionAircraft crash protection
Aircraft shield Fuel building
Safety trains segregation
Protected buildings
Non-protected buildings
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EDF / SEPTEN41
THANK YOU
FOR YOUR ATTENTION
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