ULNRC-06688, Request for License Amendment to Revise Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4B, and TSTF-439, Revision 2, Eliminate Second .

Request for License Amendment to Revise Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4B, and TSTF-439, Revision 2, Eliminate Second .

ML21294A394
Person / Time
Site:	Callaway
Issue date:	10/21/2021
From:	Banker S Ameren Missouri, Union Electric Co
To:	Document Control Desk, Office of Nuclear Reactor Regulation
Shared Package
ML21294A393	List: ML21294A395 ML21294A396 ML21294A397 ML21294A398 ML21294A399 ML21294A400 ML21294A401 ML21294A402 ML21294A403 ML21294A404 ML21294A405 ML21294A406 ML21294A407 ML21294A408 ML21294A409 ML21294A410 ML21294A411 ML21294A412 ULNRC-06688, Request for License Amendment to Revise Technical Specifications to Adopt TSTF-505, Revision 2, Provide Risk-Informed Extended Completion Times - RITSTF Initiative 4B, and TSTF-439, Revision 2, Eliminate Second .
References
ULNRC-06688
Download: ML21294A394 (5)

Text

,iimerenCallawayPlant MISSOURI October2l,2021ULNRC-06628 U.S.NuclearRegulatoryCommission Attn:DocumentControlDesk Washington,DC20555-000110CFR50.90 LadiesandGentlemen:DOCKETNUMBER50-483 CALLAWAYPLANTUNIT1 UNIONELECTRICCO.

RENEWEDFACILITYOPERATINGLICENSENPF-30 REQUESTFORLICENSEAMENDMENTTOREVISETECUNICALSPECIFICATIONSTO ADOPTTSTF-505,REVISION2,PROVIDERISK-INFORMEDEXTENDED COMPLETIONTIMES -RITSTFINITIATIVE4B,ANDTSTF-439,REVISION2, ELIMINATESECONDCOMPLETIONTIMESLIMITINGTIMEFROMDISCOVERYOF FAILURETOMEETANLCO(LDCN20-0007)

Pursuantto10CFR50.90,Applicationforamendmentoflicenseorconstructionpermit,Ameren Missouri(UnionElectricCompany)herewithtransmitsanapplicationforamendmenttoRenewed FacilityOperatingLicenseNumberNPF-30fortheCallawayPlant.Therequestedamendmentwould reviseapplicableTechnicalSpecificationstoimplementrisk-informedCompletionTimesandthe Risk-InformedCompletionTime(RICT)PrograminaccordancewiththeguidanceofTSTF-505, Revision2.InsupportoftheadoptionofTSTF-505,TSTF-439,Revision2,whichinvolvesthe eliminationofsecondCompletionTimescurrentlyspecifiedintheTechnicalSpecifications,willalso beadopted.Inaddition,therequestedamendmentwouldremoveobsoleteone-timeCompletion TimescontainedintheapplicableTechnicalSpecifications.

Specifically,theproposedamendmentwouldmodifytheTechnicalSpecificationrequirementsrelated toCompletionTimes(CTs)forspecificRequiredActionstoprovidetheoptiontocalculatealonger, risk-informedCT(RICT).Anewprogram,theRisk-InformedCompletionTimeProgram,istobe addedtoTSSection5,AdministrativeControls.ThemethodologyforusingtheRICTProgramis describedinNEI06-09-A,RiskInformedTechnicalSpecificationsInitiative4b,Risk-Managed TechnicalSpecifications(RMTS)Guidelines,Revision0,whichwasapprovedbytheNRCon May17,2007.AdherencetoNEI-06-09-AisrequiredbytheRICTProgram.Theproposed amendmentisconsistentwithNRC-approvedTSTF-505,Revision2,ProvideRiskInformed ExtendedCompletionTimes -RITSTFInitiative4b.TosupporttheadoptionofTSTF-505, TSTF-439,Revision2,isalsoadopted.TSTF-439deletesthesecondCompletionTimesfromspecific RequiredActions,revisestheImprovedStandardTechnicalSpecificationExample1.3-3toremove

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I ULNRC-06688October21,2021 Page3of5 Attachments:1.DescriptionandAssessment 2.ProposedTechnicalSpecificationChanges(Mark-up) 3.RevisedTechnicalSpecificationPages 4.ProposedChangesToTechnicalSpecificationBasesChanges(Mark-Up)Pages(For Information) 5.Cross-ReferenceofT$TF-505andCallawayTechnicalSpecifications 6.DescriptionandAssessmentSpecifictoTSTF-439

Enclosures:

1.ListofRevisedRequiredActionstoCorrespondingPRAFunctions 2.InformationSupportingConsistencywithRegulatoryGuide1.200,Revision2 3.InformationSupportingTechnicalAdequacyofPRAModelsWithoutPRAStandards EndorsedbyRegulatoryGuide1.200,Revision2 4.InformationSupportingJustificationofExcludingSourcesofRiskNotAddressedbythePRA Models 5.BaselineCoreDamageFrequency(CDF)andLargeEarlyReleaseFrequency(LERF) 6.JustificationofApplicationofAt-PowerPRAModelstoShutdownModes 7.PRAModelUpdateProcess 8.AttributesoftheRealTimeRiskModel 9.KeyAssumptionsandSourcesofUncertainty 10.ProgramImplementation 11.MonitoringProgram 12.RiskManagementActionExamples