ML12156A205

Comanche Peak Nuclear Power Plant, Units 1 and 2 - 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 A Luminant Generation Co, Luminant Power
To:	Singal B K Plant Licensing Branch IV
Singal B K
Shared Package
ML12156A209	List: ML12156A134 ML12156A205
References
TAC ME8616, TAC ME8615
Download: ML12156A205 (21)

Text

AdditionofNewTransformerXST1AAdditionofNewTransformerXST1ACPNPP LuminantPreApplicationMeetingAgendaIntroductionsCurrent/ProposedPlantDesignProposedPlantModificationOverviewProposedPlantModificationOverviewTS3.8.1.andExtendedCTCurrentandProposedRiskAnalysisProposedScheduleQuestions/Feedbacklk/ClosingRemarks/Summary 345KvSwitchyardCurrentCPNPPOffsiteACPowerSources345KvSwitchyardProtectedAreaParker1Parker2OncorControlHouse2MT2/12STMOASUnit2RelayHouseTurbineGeneratorComancheSwitchJohnsonSwitch2MT2/1XST2XST2AXST1Unit1TurbineGeneratorWolfHollow/BenbrookEverman1ST1MT2/1XST1RelayHouse25KLStephenvilleDeCordovaProtectedArea25KvLoopDeCordova138KvSwitchyard25KvLoop 345KvSwitchyardProposedCPNPPOffsiteACPowerSources345KvSwitchyardProtectedAreaParker1Parker2OncorControlHouse2ST2MT2/1MOASUnit2RelayHouseTurbineGeneratorComancheSwitchJohnsonSwitch2MT2/1XST2XST2AXST1Unit1TurbineGeneratorWolfHollow/BenbrookEverman1ST1MT2/1XST1RelayHouse25KLStephenvilleDeCordovaXST1AProtectedArea25KvLoopDeCordova138KvSwitchyard25KvLoop Current CurrentTechnicalSpecification3.8.1 Proposed ProposedTechnicalSpecification3.8.1*

XST1A PadXST1 32'-0"32'-0"14'-10"14'-2"37'-0"2'-10"14'-0"28'-5"26'-10" RiskAnalysisy*Objectivesforthissection*Objectivesforthissection-SummarizePRAModelScopeandQuality-DescribetheRiskAssessmentDescribetheRiskAssessment-DiscusstheSensitivityAnalyses-DiscusstheConfigurationRiskManagementProgramandRiskReductionMeasures PRAModelScopeandQualitypy*InternalEventsandInternalFloodingmodelsweredevelopedperRG1.200Rev2requirementsandhavebeenPeerReviewedPerthePeerReviewTeam"Overall,theCPNPPPRAwasfoundtosubstantiallymeettheASMEPRAStandardatCapabilityCategoryIIandcanbeusedtosupportriskinformedapplications"tosupportriskinformedapplications PRAModelScopeandQualityPRAModelScopeandQuality*SubsequenttothePeerReview,FindingsandqgObservationswereaddressedandincorporatedintothecurrentRevision4AmodelAll"NotMet"nowCatIIorbetterAllNotMet-nowCatIIorbetter4of7previousCatI-nowCatIIorbetterRemaining3withnoapplicationimpactAllFindingswereresolvedandincorporatedAllFindingswereresolvedandincorporatedAllbutonesuggestionincorporatedOnewasdeferredwithnoapplicationimpactAllremainingSRsmeetCatIIorbetterAllremainingSRsmeetCatIIorbetter*ExternalEventsbasedonIPEEEandwillbeusedforinsightsonlyusedforinsightsonly PRAModeldliScopeandQuality*Adequatelyaddressesasbuilt,asoperatedplant*PlantspecificdataandplantspecificbestestimateTHaddresssuccesscriteriacriteria*LossofOffsitePowermodelingisrobust*Electricpowersystemsmodelingisrobust;AlternatePowerGeneratorisinstalledandmodeledinthePRA/ldliibdhdl*SBO/RCPSealLOCAmodelingisrobustandusestheWOG2000modelwithhightemperatureseals*ConvolutionmethodusedforLOOPrecoveryanalysesConvolutionmethodusedforLOOPrecoveryanalyses DescriptionofRiskAssessmentDescriptionofRiskAssessment*ApplicableGuidanceandCriteriapp*Rev2ofRG1.174andRG1.200,andRev1ofRG1.177QtittiAlfItlEtdFld*QuantitativeAnalysesforInternalEventsandFlood,LevelIandII*QualitativeAnalysesforExternalEvents*QualitativediscussioncombinedwithIPEEEriskinsightsfortheFire,HighWinds(Tornado),andSeismic(Margins)*Supportedbydetailedwalkdownofplant DiscussionofSensitivityAnalysesDiscussionofSensitivityAnalyses*Sensitivitystudiesareusedtoaddressuncertainties.Thesestudieswillincludebutarenotlimitedto:Thesestudieswillincludebutarenotlimitedto:-ReliabilityofcomponentsimportanttotheriskcontributionsoftheCTextensionIddtifXST1CT-IncreaseddurationofXST1CT-LOOPWeatherandPlantCenteredfrequencies-Deferredmaintenance*UncertaintyanalysiswillbeperformedperNUREG1855.855.-CommonCauseFailurediscussion ConfigurationRiskManagementProgramConfigurationRiskManagementProgram*CPNPPhasaConfigurationRiskManagementProgram-IncorporatesthecharacteristicsofthemodelConfigurationRiskManagementProgramdescribedinRG1.177-CRMPdescriptionhasbeenincorporatedintoplantTechnicalSpecifications-5518Specifications5.5.18-Previouslyapprovedforonetime14daychangetoTechnicalSpecificationsforACSources-Operating-B3.8.1RequiredActionA.3(XST2Atransformerinstallation)fhl*CRMPisarequirementoftheMaintenanceRuleProgram.CPNPPendorsestheguidanceinNUMARC9301,"IndustryGuidelineForMonitoringtheEffectivenessOfMaintenanceAtNuclearPowerPlants"NuclearPowerPlants*CPNPPwillmeetthefire(a)(4)requirementbyDecember1,2013 ConfigurationRiskManagementProgram-RiskMitigationActionsRiskMitigationActions[ImplementedduringtheextendedCTs]1.RestrictedAccesstoandSuspensionofMaintenanceintheSwitchyard.2.TestingofDieselGenerators(EDGandAPG)andTurbineDrivenAuxiliaryFeedwaterPumpswithintheTwo(2)WeeksPriortotheStartoftheXST1extendedCT.3.ReschedulingofTestingandMaintenanceontheEDGs,APGs,TDAFWPs,XST2,CCWPsandSSWPstooccuroutsidetheextendedCTwindow.4.SuspensionofHotWorkActivitiesNearXST2PowerandControlCabling.lhlhfdlbl5.RovingHourlyFireWatchAlongPathsofXST2PowerandControlCabling.6.SelectionofTimeofYearDuetoWeatherConsiderations.7.OperationspreparationsandgridmonitoringduringtheCT.

PreliminaryConclusionsofRiskAssessment*BaseduponpreviousLARsubmittalandthecurrentupdatetothePRAmodelthecurrentupdatetothePRAmodel,thepreliminaryPRAresultsshowthattheextensionoftheXST1CTwillhaveminimalextensionoftheXST1CTwillhaveminimalimpactonplantrisk ProposedScheduleProposed ScheduleLuminant Power requests approval of the proposed License Amendment by September 30, 2013, to be implementedwithin120daysoftheissuanceofthelicenseimplemented within 120 days of the issuance of the license amendment.

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