Institut für Sicherheitstechnologie (ISTec) GmbH Meeting of the IAEA Technical Working Group on Nuclear Power Plant Instrumentation and Control (TWG-NPPIC)

Institut für Sicherheitstechnologie (ISTec) GmbH

Meeting of the IAEA Technical Working Group on Meeting of the IAEA Technical Working Group on Nuclear Power Plant Instrumentation and Control Nuclear Power Plant Instrumentation and Control

(TWG-NPPIC)(TWG-NPPIC)2020-22 May 2009-22 May 2009

IAEA ViennaIAEA Vienna

Reporting on I&C status and recommendations to IAEAReporting on I&C status and recommendations to IAEA

Arndt LindnerArndt LindnerInstitute for Safety Technology (ISTec) GarchingInstitute for Safety Technology (ISTec) Garching

Institut für Sicherheitstechnologie (ISTec) GmbHFolie Nr. 2

TWG-NPPICTWG-NPPICContent

1.1. Nuclear energy in GermanyNuclear energy in Germany

2.2. I&C status in GermanyI&C status in Germany

3.3. Recommendations to IAEARecommendations to IAEA

4.4. ConclusionsConclusions


TWG-NPPICTWG-NPPICNuclear Energy in Germany

There are spent fuel There are spent fuel interim storages at interim storages at all sitesall sites



NPP in operation Output (MWel) Start of comercial operation

Biblis A 1225 1975

Biblis B 1300 1977

Brokdorf 1440 1986

Brunsbüttel 806 1977

Emsland 1400 1988

Grafenrheinfeld 1345 1982

Grohnde 1430 1985

Gundremmingen B 1344 1984

Gundremmingen C 1344 1985

Isar 1 912 1979

Isar 2 1475 1988

Krümmel 1402 1984

Neckarwestheim I 840 1976

Neckarwestheim II 1400 1989

Philippsburg 1 926 1980

Philippsburg 2 1458 1985

Unterweser 1410 1976

Nuclear energy Nuclear energy providesprovides22,1% of power 22,1% of power generationgeneration



““Consensus on Nuclear Power” (from June 11, 2001) Consensus on Nuclear Power” (from June 11, 2001) is still valid (phase-out of nuclear power)is still valid (phase-out of nuclear power)

Several NPPs plan and implement I&C up-gradesSeveral NPPs plan and implement I&C up-grades

Limitation and reactor control systems (GKN, Limitation and reactor control systems (GKN, KKU, KKI)KKU, KKI)

Modernized main control room (KKI)Modernized main control room (KKI)

Independent emergency protection system (KKP)Independent emergency protection system (KKP)

Turbine control and protection in several NPPsTurbine control and protection in several NPPs

Applications for digital protection systems have been Applications for digital protection systems have been submitted (GKN, KWB)submitted (GKN, KWB)



Update of the nuclear regulatory framework Update of the nuclear regulatory framework Revision D now availableRevision D now available((http://regelwerk.grs.de/))

12 modules12 modules I&C is subject-matter of Module 5I&C is subject-matter of Module 5 The modules are available only in The modules are available only in

German languageGerman language




TWG-NPPICTWG-NPPICI&C status in Germany

Although lots of information about measures to Although lots of information about measures to overcome CCF discussion on that issue starts againovercome CCF discussion on that issue starts again

IEC 62340 Nuclear power plants - Instrumentation and IEC 62340 Nuclear power plants - Instrumentation and control systems important to safety - Requirements for control systems important to safety - Requirements for coping with common cause failure (CCF) is acceptedcoping with common cause failure (CCF) is accepted

Application to German NPPs is discussed Application to German NPPs is discussed controversiallycontroversially

Situation is complicated due to application of Situation is complicated due to application of competing standardscompeting standards



Example: Safety classificationExample: Safety classification

IAEA:IAEA:

IEC 61226:IEC 61226:

IEC 61508:IEC 61508:

ISO 13849:ISO 13849:

Functions of Category AFunctions of Category BFunctions of Category CNon-categorized functions

Safety Integrity Level (SIL) 0Safety Integrity Level (SIL) 1Safety Integrity Level (SIL) 2Safety Integrity Level (SIL) 3Safety Integrity Level (SIL) 4

Performance Level (PL) aPerformance Level (PL) bPerformance Level (PL) cPerformance Level (PL) dPerformance Level (PL) e



Industry makes proposalsIndustry makes proposals

Regulators have additional requirements

Regulators have additional requirements

Licensed is what neither industry nor regulators

want

Licensed is what neither industry nor regulators

want



IIAA Set of input signals of sub system ASet of input signals of sub system A

IIBB Set of input signals of sub systemSet of input signals of sub system B B

PLCPLCAiAi PLC(s) APLC(s) Aii; i = 1, 2, 3, 4 ; i = 1, 2, 3, 4

PLCPLCBiBi PLC(s) BPLC(s) Bii; i = 1, 2, 3, 4; i = 1, 2, 3, 4

ii Internal run time of redundancy iInternal run time of redundancy i

RRii Redundancy i; i = 1, 2, 3, 4Redundancy i; i = 1, 2, 3, 4

AA Sub-system ASub-system A

BB Sub-system BSub-system B






TWG-NPPICTWG-NPPICRecommendations to IAEA

Basis:Basis: List of recommendations of TWG-NPPCI List of recommendations of TWG-NPPCI Members to the IAEA to be considered in the Members to the IAEA to be considered in the 2008-2009 and 2010-2011 Activities2008-2009 and 2010-2011 Activities

a.a. Design, Qualification, and Application of Digital I&C SystemsDesign, Qualification, and Application of Digital I&C Systemsb.b. Modernization of I&C Systems and ComponentsModernization of I&C Systems and Componentsc.c. I&C HW and SW Life-Cycle Related IssuesI&C HW and SW Life-Cycle Related Issuesd.d. Human Factors and Reliability, MCR Design, HSIHuman Factors and Reliability, MCR Design, HSIe.e. Improvement and Optimization of Equipment and System Improvement and Optimization of Equipment and System

PerformancePerformancef.f. I&C Knowledge Management and Transfer; Aging WorkforceI&C Knowledge Management and Transfer; Aging Workforceg.g. Utilizing Lessons Learned in Operation, Maintenance, and Utilizing Lessons Learned in Operation, Maintenance, and

Modernization of I&CModernization of I&Ch.h. Licensing I&C SystemsLicensing I&C Systemsi.i. Emerging TechnologiesEmerging Technologies



Signal validation based on modern equipment (c, e, i)Signal validation based on modern equipment (c, e, i)

Complexity of I&C systems, equipment and software Complexity of I&C systems, equipment and software (a, h)(a, h)

Concentration of functions on single CPUs (h)Concentration of functions on single CPUs (h)

Qualification and use of FPGA and similar “hard Qualification and use of FPGA and similar “hard programmed” equipment (a, h)programmed” equipment (a, h)

Electromagnetic Influence on I&C equipment by Electromagnetic Influence on I&C equipment by conducted and radiated disturbances (a, i)conducted and radiated disturbances (a, i)



Control of CCF (a, h)Control of CCF (a, h)

Cyber security (new activities in IEC/SC45A) (a, h, i)Cyber security (new activities in IEC/SC45A) (a, h, i)

Use of I&C equipment not designed for use in NPPs Use of I&C equipment not designed for use in NPPs in nuclear safety applications (a, h)in nuclear safety applications (a, h)

Application of competing standards (nuclear vs. Application of competing standards (nuclear vs. nonnuclear) in licensing procedures (a, h)nonnuclear) in licensing procedures (a, h)



Institut für Sicherheitstechnologie (ISTec) GmbH Meeting of the IAEA Technical Working Group on Nuclear Power Plant Instrumentation and Control (TWG-NPPIC)

Documents

twgnppic nuclear energy

control twgnppic

twgnppic ic status

twgnppic recommendations

twgnppic content

nuclear power consensus

system b slide

modules ic