RegulatoryDocumentRD–310SafetyAnalysisforNuclearPowerPlantsFebruary2008CNSCREGULATORYDOCUMENTSTheCanadianNuclearSafetyCommission(CNSC)developsregulatorydocumentsundertheauthorityofparagraphs9(b)and21(1)(e)oftheNuclearSafetyandControlAct(NSCA).RegulatorydocumentsprovideclarificationsandadditionaldetailstotherequirementssetoutintheNSCAandtheregulationsmadeundertheNSCA,andareanintegralpartoftheregulatoryframeworkfornuclearactivitiesinCanada.Eachregulatorydocumentaimsatdisseminatingobjectiveregulatoryinformationtostakeholders,includinglicensees,applicants,publicinterestgroupsandthepubliconaparticulartopictopromoteconsistencyintheinterpretationandimplementationofregulatoryrequirements.ACNSCregulatorydocument,oranypartthereof,becomesalegalrequirementwhenitisreferencedinalicenceoranyotherlegallyenforceableinstrument.RegulatoryDocumentRD–310SAFETYANALYSISFORNUCLEARPOWERPLANTSPublishedbytheCanadianNuclearSafetyCommissionFebruary2008REGULATORYDOCUMENTRD–310SAFETYANALYSISFORNUCLEARPOWERPLANTSPublishedbytheCanadianNuclearSafetyCommission©MinisterofPublicWorksandGovernmentServicesCanada2008Extractsfromthisdocumentmaybereproducedforindividualusewithoutpermission,providedthesourceisfullyacknowledged.However,reproductioninwholeorinpartforpurposesofresaleorredistributionrequirespriorwrittenpermissionfromtheCanadianNuclearSafetyCommission.Cataloguenumber:CC173-3/4-310E-PDFISBN978-0-662-47989-5CedocumentestégalementdisponibleenfrançaissousletitreAnalysesdelasûretépourlescentralesnucléaires.DocumentavailabilityThedocumentcanbeviewedontheCNSCwebsiteat:613-995-5894or1-800-668-5284(Canadaonly)Facsimile:613-992-2915E-mail:info@cnsc-ccsn.gc.caPREFACEThisregulatorydocumentwasdevelopedpursuanttotherequirementsandobligationssetforthintheGeneralNuclearSafetyandControlRegulationsandintheClassINuclearFacilitiesRegulations,whereasafetyanalysisreportdemonstratingthesafetyofthenuclearfacilitymustbesubmittedtotheCanadianNuclearSafetyCommission(CNSC).Thedocumentidentifieshigh-levelregulatoryinformationforanuclearpowerplantlicenceapplicant’spreparationandpresentationofasafetyanalysis.Theinformationrequiredadherestohighstandardsandisconsistentwithmodernnationalandinternationalpracticesaddressingissuesandelementsthatcontrolandenhancenuclearsafety.Inparticular,itestablishesamoremodernrisk-informedapproachtothecategorizationofaccidents,onethatconsidersafullspectrumofpossibleeventsincludingtheeventsofgreatestconsequencetothepublic.TheCNSCexpectsproponentsandapplicantsfornewreactorlicencestoimmediatelyapplythisregulatorydocumentinnew-buildsubmissions.Inthecontextofexistingreactors,CNSCexpectsthelicenseestoapplythisdocument,inagraduatedmanner,toallrelevantprogramsinfuturesubmissions.February2008RD–310iTABLEOFCONTENTS1.0PURPOSE............................................................................................................12.0SCOPE.................................................................................................................13.0RELEVANTLEGISLATION.................................................................................14.0SAFETYANALYSISOBJECTIVES.....................................................................25.0SAFETYANALYSISREQUIREMENTS..............................................................35.1Responsibility........................................................................................................35.2EventstobeAnalyzed...........................................................................................35.2.1IdentifyingEvents...................................................................................................35.2.2ScopeofEvents.....................................................................................................35.2.3ClassificationofEvents..........................................................................................45.3AcceptanceCriteria...............................................................................................45.3.1NormalOperation...................................................................................................45.3.2AnticipatedOperationalOccurrencesandDesignBasisAccidents......................45.3.3BeyondDesignBasisAccidents............................................................................55.3.4AcceptanceCriteriaforAOOsandDBAs..............................................................55.4SafetyAnalysisMethodsandAssumptions...........................................................55.4.1General..................................................................................................................55.4.2AnalysisMethod.....................................................................................................65.4.3AnalysisData...............................................................