Technical Guideline for EPR

TNPS1and2Appendix:1.Al.AAPPENDIX1A:EPRGUIDELINES{{TECHNICALGUIDELINESFORTHEDESIGNANDCONSTRUCTIONOFTHENEXTGENERATIONOFNUCLEARPOWERPLANTSWITHPRESSURIZEDWATERREACTORSITSNPInthefollowingTechnicalGuidelines:-PlantConditionCategory(PCC)isequivalenttoDesignBasisCondition(DBC)inPSAR,PreliminarySafetyAnalysisReportusedPage:I11-RiskReductionCategory(RRC)isequivalenttoDesignExtensionCondition(DEC)usedinPSAR.TECHNICALGUIDELINESFORTHEDESIGNANDCONSTRUCTIONOFTHENEXTGENERATIONOFNUCLEARPOWERPLANTSWITHPRESSURIZEDWATERREACTORSAdoptedduringtheGPRlGermanexpertsplenarymeetingsheldonOctober19'~and26'h2000ContentsINTRODUCTIONANDSCOPEOFAPPLICATION..................................................................................................1..........................................................................................................A-PRINCIPLESOFTHESAFETYCONCEPT2A.1-GENERALSAFETYAPPROACH................................................................2A.I.1-GeneralsafetyobjectiveA.1.2-Tlre'ilefence-in-A.1.3-GeneralstrategyrelatedtosevereaccidentA.1.4-SafetydemonstrationA.2-GENERALSAFETYPRINCIPLES.............................................A.2.1-PlanttransientbehaviouA.2.2-RedundancyanA.2.3-Man-machineintefaceA.2.4-ProtectionagainstinternalhazardsA.2.5-Protectionagainstextei-nalhazardsA.2.6-UseofprobabilisticsafetyassessmenA.2.7-RadiationprotectionofworkersandofthepubliB.CONCEPTUALSAFETYFEATVRES..................................................................................................................12B.l-DESIGNOFBARRIERS......................B.I.1-FuelcladdiB.1.2.1-GeneralrequirementsB.1.2.2-BreakpostulateB.1.3-Requireme?ttsrelatedtothemainsecondaB.1.4-ConfinemerttfirnctioB.1.4.2-PreventionofcontainmentbypasB.2-SAFETYFUNCTIONSANDSYSTEMSB.2.2-RequirementsonsafetyequipmentB.2.2.1-QualificationofsafetyequipmenB.2.3-RequirementsonspecificsB.2.3.1-Reactivitycontrolfunction8.2.3.3-Emergencycorecoolingfunction8.2.3.4-SecondarysideheatremovalfunctionB.2.3.5-ContainmentheatremovalfunctioB.2.3.6-Primarycircuitoverpressurization......................................................................................................B.2.3.7-Secondarysideoverpressureprotectionfunction24B.2.4-Requiren~entsonsupportsafetysystems5...........................................................................................................................................B.2.4.1-Electricalpowersupplies25B.2.4.2-Componentcoolingwatersystemandessentialservicewatersystem.......................................................................25C-ACCIDENTPREVENTIONANDPLANTSAFETYCHARACTERISTICS.................................................27C.1-REDUCTIONOFTHEFREQUENCIESOFINITIATINGEVENTS....C.2-REDUNDANCYANDDNERSIC.2.1-Singlefailurecriterionandpreventivemai~~te?~anceC2.2-ProbabilisticsafetyassessmentanddiversiC.3-HUMANFACTORS......................C.4-RADIATIONPROTECTIONOFWORKERSANDOFTHEPUBLIC4.1-RadiationprotectioninnarnialoperatiaC4.2-Radioactivereleases,wastereductionanddismantlingC.4.2.1-WastereductionanddismantlingC.4.2.2-EfluentheahnentsystemD-CONTROLOFREFERENCETRANSIENTS,INCIDENTSANDACCIDENTS.............................................34D.1-LISTOFREFERENCETRANSIENTS,INCIDENTSANDACCIDENTD.2-SAFETYANALYSISRULESANDACCEPTANCECNTERlA0.2.1-Safetyanalysisrule0.2.2-Acceptancecriteria0.2.3-Useofcomp~itercodes0.2.4-RadiologicalconsequencesE-CONTROLOFMULTIPLEFAILURESCONDITIONSANDCOREMELTACCIDENTS..........................41E.1-MULTIPLEFAILURESCONDITIONS...........................41E.I.1-Considerationinthesafetyden~onstratioI............................................................................................E.l.2-Deternlinisticassessme~jbofRRC-Aconditions41E.1.2.1-ListofRRC-E.1.2.2-InvestigationofspecificsequenceE.1.2.3-AccidentanalysisrulesandacceptancecriteriE.1.3-ProbabilisticE.2-PROTECTIONMEASURESAGAINSTCOREMELTACCIDENT..E.2.1-Safityobjectzves............................................................................................................................................44E.2.2-Practicaleliminationofsequer~ceswithlargeearlyreleasesE.2.2.1-P~eventionE.2.2.2-PreventionoffastreactivityaccidentE.2.2.3-PreventionofsteamexplosionsE.2.2.4-PreventionofhydrogendetonaE.2.2.5-PreventionofcontainmentbypassE.2.2.6-PreventionE.2.3-MitigationoflowpressurecoremeltscenariosE.2.3.1-Ex-vesselmoltencorecoolabilityE.2.3.2-ConfainmeE.2.3.3-InstrumentationE.2.3.4-QualificationundersevereaccidentconditionsE.2.4-Safetydemonstratio?F-PROTECTIONAGAINSTHAZARDS.................................................................................................................34F.1-PROTECTIONAGAINSTINTERNALHAZARDS............................54F.1.I-Generalrequiremenfs....................................................................................................................................54F.1.2-Requiren~entsforthedesignofprotectionmeasuresagainstinterrlalhazardsF.1.2.1-Failuresofpipes,vessels,tanks,pumpsandvalvesF.1.2.2-InternalfloodingsF.1.2