ML12156A205

Presentation to NRC for LAR 12 (TAC Nos. ME8615 and ME8616)

ML12156A205
Person / Time
Site:	Comanche Peak
Issue date:	05/31/2012
From:	Slough R Luminant Generation Co, Luminant Power
To:	Balwant Singal Plant Licensing Branch IV
Singal B
Shared Package
ML12156A209	List: ML12156A134 ML12156A205
References
TAC ME8616, TAC ME8615
Download: ML12156A205 (21)

Text

Addition ofNewTransformerXST1A AdditionofNewTransformerXST1A CPNPP LuminantPreApplicationMeetingAgendaIntroductionsCurrent/ProposedPlantDesignProposedPlantModificationOverviewProposedPlantModificationOverview TS3.8.1.andExtendedCTCurrentandProposed RiskAnalysisProposedScheduleQuestions/Feedback l k/C l osingRemar k s/Summary 345 Kv SwitchyardCurrentCPNPPOffsiteACPowerSources 345KvSwitchyard ProtectedAreaParker1Parker2 OncorControlHouse2MT2/1 2ST MOAS Unit2RelayHouse TurbineGeneratorComancheSwitchJohnsonSwitch2MT2/1 XST2 XST2A XST1 Unit1 TurbineGenerator WolfHollow/Benbrook Everman 1ST1MT2/1 XST1RelayHouse 25 K LStephenvilleDeCordova ProtectedArea 25K vL oopDeCordova 138KvSwitchyard 25KvLoop 345 Kv SwitchyardProposedCPNPPOffsiteACPowerSources 345KvSwitchyard ProtectedAreaParker1Parker2 OncorControlHouse 2ST2MT2/1 MOAS Unit2RelayHouse TurbineGeneratorComancheSwitchJohnsonSwitch2MT2/1 XST2 XST2A XST1 Unit1 TurbineGenerator WolfHollow/Benbrook Everman 1ST1MT2/1 XST1RelayHouse 25 K LStephenvilleDeCordova XST1A ProtectedArea 25K vL oopDeCordova 138KvSwitchyard 25KvLoop Current CurrentTechnicalSpecification3.8.1 Proposed ProposedTechnicalSpecification3.8.1*

XST1A Pad XST1 32'-0"32'-0"14'-10"14'-2"37'-0"2'-10"14'-0"28'-5"26'-10" RiskAnal y sis y*Objectivesfor this section*Objectivesforthissection-SummarizePRAModelScopeandQuality-Describe the RiskAssessment DescribetheRiskAssessment

-DiscusstheSensitivityAnalyses-DiscusstheConfigurationRiskManagementProgramandRiskReductionMeasures PRAModelSco p eandQualit y p y*InternalEventsandInternalFloodingmodelsweredevelopedperRG1.200Rev2requirementsandhavebeenPeerReviewedPerthePeerReviewTeam"Overall,theCPNPPPRAwasfoundtosubstantiallymeettheASMEPRAStandardatCapabilityCategoryIIandcanbeusedto support riskinformedapplications "tosupportriskinformedapplications PRA ModelScope and Quality PRAModelScopeandQuality*Subse quenttothePeerReview,Findin g sandq gObservationswereaddressedandincorporatedintothecurrentRevision4Amodel All"NotMet"nowCat II orbetter AllNotMet-nowCatIIorbetter 4of7previousCatI-nowCatIIorbetterRemaining3withnoapplicationimpact All Findingswereresolved andincorporated AllFindingswereresolvedandincorporated Allbutonesuggestionincorporated Onewasdeferredwithnoapplicationimpact Allremaining SRsmeetCat II orbetter AllremainingSRsmeetCatIIorbetter*ExternalEventsbasedonIPEEEandwillbeusedforinsights only usedforinsightsonly PRAModeld liScopean dQua li ty*Adequatelyaddressesas built,asoperatedplant*PlantspecificdataandplantspecificbestestimateT Haddresssuccesscriteriacriteria*LossofOffsitePowermodelingisrobust*Electricpowersystemsmodelingisrobust;AlternatePowerGeneratorisinstalledandmodeledinthePRA/ldli i b d h dl*SBO/RCPSea lLOCAmo d e li ngi sro bustan dusest h eWOG2000mo d e lwithhightemperatureseals*Convolutionmethod usedforLOOPrecoveryanalysesConvolutionmethodusedforLOOPrecoveryanalyses Description of RiskAssessment DescriptionofRiskAssessment

• A pplicableGuidanceandCriteria pp*Rev2ofRG1.174andRG1.200,andRev1ofRG1.177Qtitti Al fItl Et dFld*Q uan tit a ti veA na lysesf orI n t erna lEven t san dFl oo d ,LevelIandII*QualitativeAnalysesforExternalEvents*QualitativediscussioncombinedwithIPEEEriskinsightsfortheFire,HighWinds(Tornado),andSeismic(Margins)*Supportedbydetailedwalk downofplant Discussion of SensitivityAnalyses DiscussionofSensitivityAnalyses*Sensitivitystudiesareusedtoaddressuncertainties.Thesestudies will include butare notlimitedto: Thesestudieswillincludebutarenotlimitedto:-ReliabilityofcomponentsimportanttotheriskcontributionsoftheCTextension Iddti fXST1 CT-Increase ddura ti ono fXST1CT-LOOPWeatherandPlantCenteredfrequencies

-Deferredmaintenance

• UncertaintyanalysiswillbeperformedperNUREG 1 855.855.-CommonCauseFailurediscussion Configuration RiskManagementProgramConfigurationRiskManagementProgram*CPNPPhasaConfigurationRiskManagementProgram-IncorporatesthecharacteristicsofthemodelConfigurationRiskManagementProgramdescribedinRG1.177-CRMPdescriptionhasbeenincorporatedintoplantTechnicalSpecifications

-5518Specifications5.5.18-Previouslyapprovedforonetime14daychangetoTechnicalSpecificationsforACSources-Operating-B3.8.1RequiredActionA.3(XST2Atransformerinstallation) f h l*CRMPisarequiremento ft h eMaintenanceRu l eProgram.CPNPPendorsestheguidanceinNUMARC93 01,"IndustryGuidelineForMonitoringtheEffectivenessOfMaintenanceAtNuclearPowerPlants"NuclearPowerPlants*CPNPPwillmeetthefire(a)(4)requirementbyDecember1,2013 ConfigurationRiskManagementProgram-RiskMitigation Actions RiskMitigationActions[ImplementedduringtheextendedCTs]1.RestrictedAccesstoandSuspensionofMaintenanceintheSwitchyard.2.TestingofDieselGenerators(EDGandAPG)andTurbineDrivenAuxiliaryFeedwaterPumpswithintheTwo(2)WeeksPriortotheStartoftheXST1extendedCT.3.ReschedulingofTestingandMaintenanceontheEDGs,APGs,TDAFWPs,XST2,CCWPsandSSWPstooccuroutsidetheextendedCTwindow.4.SuspensionofHotWorkActivitiesNearXST2PowerandControlCabling.l h l h f d l bl5.RovingHour l yFireWatc hA l ongPat h so fXST2Poweran dContro lCa bl ing.6.SelectionofTimeofYearDuetoWeatherConsiderations.7.OperationspreparationsandgridmonitoringduringtheCT.

PreliminaryConclusionsofRiskAssessment

• BaseduponpreviousLARsubmittalandthecurrentupdate to the PRA model thecurrentupdatetothePRAmodel ,thepreliminaryPRAresultsshowthattheextension of theXST1 CT willhave minimalextensionoftheXST1CTwillhaveminimalimpactonplantrisk ProposedSchedule Proposed ScheduleLuminant Power requests approval of the proposed License Amendment by September 30, 2013, to be implementedwithin120daysoftheissuanceofthelicense implemented within 120 days of the issuance of the license amendment.

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