ML15096A056
| ML15096A056 | |
| Person / Time | |
|---|---|
| Site: | Browns Ferry  |
| Issue date: | 04/07/2015 |
| From: | Doyle G Tennessee Valley Authority |
| To: | Plant Licensing Branch II |
| Saba F DORL/LPL2-2 301-415-1447 | |
| References | |
| Download: ML15096A056 (39) | |
Text
Browns Ferry Nuclear Plant Extended Power Uprate License Amendment Request Startup Test Plan Gerry Doyle Director EPU April 7, 2015
BFN EPU - Agenda Browns Ferry EPU License Amendment Request Startup Test Plan l 2
Introductions
OverviewandSchedule BrownsFerryExtendedPowerUprate(EPU)
StartupTestPlanRolesandResponsibilities BrownsFerryEPUStartupTestPlan LargeTransientTesting Questions/Comments G.Doyle G.Doyle G.Doyle A.Bechem A.Bechem G.Doyle
BFN EPU - Overview and Schedule Browns Ferry EPU License Amendment Request Startup Test Plan l 3 NewconsolidatedBrownsFerryExtendedPowerUprate(EPU)
LicenseAmendmentRequest(LAR)submittal SupersedespreviousBrownFerryEPUsubmittals AddressescurrentBrownsFerryconditionsandlicensingbasis(e.g.,AREVA ATRIUM10XMfueltype)
UsestheformatofRS001,ReviewStandardforExtendedPower Uprates AddressespreviousapplicableNRCRequestsforAdditionalInformation (RAIs)
Appliesimprovedsubmittalverificationprocesstoensurecompleteness andaccuracy Weareheretopresentanddiscussourpositionforaddressing potentialStartupTestPlanissuesinordertoprecludeimpacttothe BrownsFerryEPULARreview ProposedStartupTestPlandevelopedconsistentwithexistingguidance IncludesjustificationfornotperformingtwoSteadyStateandSmallTransientTestsand theLargeTransientTests(LTTs)
PreviousBrownsFerryEPULARs(nowwithdrawn)includedcommitmenttoperform generatorloadrejectionLTTonBrownsFerryUnit1
BFN EPU - Overview and Schedule (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 4
BFN EPU - Startup Test Plan Roles and Responsibilities Browns Ferry EPU License Amendment Request Startup Test Plan l 5 FortheBrownsFerryEPU,OperationsisresponsiblefortheStartupTestPlanandits implementation Consistentwithcurrentpractice Operationsisresponsibleforensuringrequiredtestingisperformed,duringstartup fromarefuelingoutage MostEPUStartupTestsaresatisfiedbyexistingsurveillanceorfunctionaltests ASeniorReactorOperatorwillbedesignatedastheEPUStartupTestDirector Similartoprevioussuccessfulstartuptestprograms TosupportOperationsinthedevelopmentoftheBrownsFerryEPUStartupTest Plan,industryexpertisewasobtained
BFN EPU - Startup Test Plan Browns Ferry EPU License Amendment Request Startup Test Plan l 6
Background
BrownsFerryStartupTestPlandevelopedusingthefollowing GuidanceforextendedpowerupratesinGeneralElectric(GE)topicalreports (ELTR1,ELTR2,CLTR)
NRCStandardReviewPlan(SRP),NUREG0800,Section14.2.1,Generic GuidelinesforExtendedPowerUprateTestingPrograms Startupandpowerascensiontestingperformedduringinitialplantstartupas discussedintheBrownsFerryUFSARSection13.5 RefuelingTestProgramtestsperformedfollowingeachrefuelingoutageas discussedintheBrownsFerryUFSARSection13.10 OperatingExperience:
BrownsFerry-Informationanddatafromplanttransients (InitialStartupTestResults,Unit1RestartTests,LicenseeEventReports(LERs))
Industry-OtherBWRsthathaveimplementedEPUs
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 7
Background
GEtopicalreports ELTR1(NRCfullyendorsedrecommendedtesting)
- Providedstandardsetoftestrequirements
- ProvidedcriteriaforLTTs(whatLTTstoperformandwhentoperform)
CLTR
- Providedstandardsetoftestrequirements
- EliminatedLTTsforConstantPressurePowerUprates(CPPUs)
NRCacceptedthetestprogramoftheCLTR
- However,NRCreservedtherighttoconsideronaplantspecificbasisthe CLTRrecommendationsagainstperformingLTTs CLTRcontrollingdocumentfortheBrownFerryEPU
- ComplywiththestartuptestrequirementsofCLTR
- TakeexceptiontoLargeTransientTestinginELTR1,consistentwithCLTR
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 8
Background
NUREG0800,Section14.2.1,GenericGuidelinesforExtendedPowerUprate TestingPrograms IdentifyandcompareInitialStartupTestPlantoproposedEPUStartup TestPlan a)
Allinitialpowerascensiontestsperformedatapowerlevel<80%of OriginalLicensedThermalPower(OLTP)thatwouldbeinvalidatedbyEPU b)
Allinitialpowerascensiontestsperformedatapowerlevel80%ofOLTP c)
DifferencesbetweentheproposedEPUTestProgramandtheportionsof theinitialpowerascensiontestprogramidentifiedbya)andb)
ProposedBrownsFerryEPUStartupTestPlanfollowstheseguidelines
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 9
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 10
Background
MostBrownsFerryEPUStartupTestrequirementssatisfiedby Existingsurveillanceorfunctionaltests Instrumentcalibrations Postmodificationtesting Steadystatedatacollection/systemmonitoring UsesGEprovidedtestspecifications ConsistentwithCLTR BasedonanalysisandGEBWRexperiencewithupratedplants TestsaredescribedintheEPUStartupTestPlan NotestswillbeinvalidatedbyBrownsFerryEPU
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 11 PlannedEPUTesting FollowsCLTRandUtilizesGETestSpecifications Procedure-MasterSequence(modifications,EPU,reviews,approvals)
PowerIncreases AlonganestablishedFlowControl/RodLine SteadyStatedatacollectionstartsat90%CurrentLicensedThermalPower (CLTP)
Incrementsof<5%totestplateautoEPUPowerLevel Data FuelThermalMargins SystemPressures,Flows,Vibration,Chemistry,Radiation,etc.
Evaluatedatcurrentpowerlevel Valueprojectedtonextpowerincrement ControlTesting FeedwaterLevelControl:LevelandFlowsetpointchanges PressureControl:Pressuresetpointchanges(TurbineControlValves(TCVs),
TurbineBypassValves(TBVs),both)
RecirculationFlowControl:Speedsetpointchanges
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 12 PlannedEPUTesting ChemicalandRadiochemical-Verifieswaterqualityremainsinspecification Performedateachplateau,andusesexistingplantprocedures RadiationMeasurements-Verifiesplantradiologicalpostingsarevalidaspoweris raised ControlRodDrive-Normalsurveillancetesting VesselWaterLevel-Instrumentscalibrationandmonitoring IntermediateRangeMonitorsCalibration-VerifyoverlapbetweenIntermediate RangeMonitorsandAveragePowerRangeMonitors LocalPowerRangeMonitorsCalibration-Normalsurveillancetesting AveragePowerRangeMonitorsCalibration-EachChanneladjustedtocore thermalpowerdeterminedbyheatbalance InstrumentcalibrationswilladjustAveragePowerRangeMonitorflowbiased scramandrodblocksetpoints ProcessComputer-Instrumentcalibrationsverifyinputparameters Calculationsforheatbalanceandthermallimitswillbeconfirmed CorePowerDistribution-TraversingIncore Probedatawillbetakentoconfirm thereproducibilityoftheTraversingIncore Probesystemreadingsandvaliddatais analyzedtodeterminecorepowerdistribution,andcheckthecorepower symmetryTestingwillbeperformedperplantprocedures
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 13 PlannedEPUTesting CorePerformance-Corethermalpowerandcoreperformanceparametersare calculatedusingacceptedmethods.
Performanceparametersareutilizedtoprojectthosevaluestothenextpowerlevel steptoensurecurrentlicensedandoperationalpracticearemaintained ElectricalOutput/HeatRate/SteamProduction-Newbaselinethermal performancedatawillbecollectedatEPUusingexistingthermalperformance program.
PressureRegulator-PressureSetpoint transienttestingwillbeperformedateach plateau(upto~96%EPU)
Feedwater System-LevelandFlowSetpoint transienttestingwillbeperformedat eachplateau(upto~96%EPU)
TurbineBypass,TurbineStop,TurbineControlValves-Thistestwilldeterminethe maximumpowerthatsurveillancetestingofTurbineStopValves(TSVs),TCVsand TBVscanbeperformedwithoutascramorisolation MainSteamIsolationValves(MSIVs)- OnlyapartialMSIVstroketestsper surveillancetestsareperformedtoverifyassociatedReactorProtectionSystem functions Duringthetest,anMSIVisclosed10% sothereissomesteamflowdisturbance ThistestwilldeterminethemaximumpowerMSIVscanbepartiallystroked
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 14 PlannedEPUTesting RecirculationFlowControl-Speedsetpoint transienttestingperformedto optimizedcontrol VibrationMeasurements-Designatedpipingpoints(i.e.,locationanddirection)in selectedsystems(mainsteam,feedwater,etc.)willbemonitoredforvibration AdditionaldetailintheVibrationMonitoringPlan SystemPerformance&Monitoring-Routinemeasurementsofthepower dependentparameterswillevaluatedateachplateauandvalueprojectedtonext powerplateau ReplacementSteamDryer-Monitoringrequirements-tobeaddressedduringa futurepreapplicationmeeting
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 15 BrownsFerryInitialStartupTestsnotproposedtobere performedforEPU(whichwereperformed80%OLTP)
SteadyStateandSmallTransient AppliestoonlytwoinitialStartupTests LargeTransientTests(LTTs)
JustificationforeliminatingtestsfollowsNUREG0800guidance
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 16 Steady-State, Small Transients (initially performed 80% and not proposed to be re-performed for EPU)
UFSARInitialStartupTestNo.21(FluxResponsetoRods)
Testdemonstratedthestabilityofthepowerreactivityfeedbackloopwith increasingreactorpoweranddeterminedtheeffectofcontrolrodmovementon reactorstability Justification ThistestisnotrequiredtobeperformedatBrownsFerryduetothefollowing 120%ofOLTPpowerwillbeachievedonthepreviouslylicensedMaximum ExtendedLoadLineLimitAnalysisrodline Analyticalstabilityevaluationsarecorereloaddependent,andareperformed foreachreloadfuelcycleinaccordancewithapprovedprocedures Reactorcorestabilitymonitoringisperformedcontinuouslybyadedicated systemandbyoperatoroversight
BFN EPU - Startup Test Plan (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 17 Steady-State, Small Transients (initially performed 80% and not proposed to be re-performed for EPU)
UFSARInitialStartupTestNo.36(EqualizerOpen)
Testexploredtheperformanceoftherecirculationsystemundertheconditionsof onerecirculationpumpoperatingandtheequalizingvalvesopentocrosstiethe twoloops Justification ThistestisnotrequiredtobeperformedatBrownsFerryduetothefollowing BrownsFerrydoesnotoperatewithonerecirculationpumpandtheequalizing valvesopen BrownsFerryUnits1and3-Equalizervalveshavebeenremovedfromthe recirculationpiping BrownsFerryUnit2-Equalizervalvesarestillinstalledbutoperatingrestrictionsdo notpermitbothvalvesbeingopenduringpoweroperation
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 18 TransientTestsPerformedat80%OLTP UFSAR 13.5.2.2 Test Number InitialStartupTransient Test MaxPower Level
(%ofOLTP)
Table1or2 of SRP14.2.1 EPUTesting Planned U1 U2 U3 22 PressureRegulator StepSetpointChanges 100 100 100 Table1 Yes 23 Feedwater System SinglePumpTrip StepSetpointChanges LossofFWHeating 100 100 85 100 100
100 100
Table2 Table1 Table2 No*
Yes No*
24 Bypass Valves CycleTurbineBypassValves 100 100 100 Table1 Yes 25 MainSteamIsolationValves ClosureofSingle MSIV ClosureofAllMSIVs 70 HU 70 100 70 100 Table1 Table2 No*
No*
- Justificationincluded inTestPlan
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 19 TransientTestsPerformedat80%OLTP
BFN EPU - Large Transient Testing Browns Ferry EPU License Amendment Request Startup Test Plan l 20 LargeTransientTests(LTTs)
ELTR1(NRCfullyendorsedrecommendedtesting)andLTTs MSIVClosureTest performifuprate>10%aboveanypreviousMSIVclosuretransient GeneratorLoadRejectionTest performifuprate>15%aboveanypreviouslyrecordedgeneratorload rejectiontransient LTT-MSIVClosureTest TestPurpose:Verifyplantoperationfollowingsimultaneousfullclosure ofallMSIV'sandfollowingfullclosureofonevalve SingleMSIVclosuretestisnotapplicabletoBrownsFerry Performedupto70%OLTPduringinitialstartup,andresultsnotinvalidatedby EPU SingleMSIVclosuretestingatpowerisnolongerperformedatBrownsFerry Fullclosuretestingisperformedwhenunitisshutdowninaccordancewith theInservice TestingProgram Partialclosuretesting(~10%)isperformedatpowertoverifyReactor ProtectionSysteminputs
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 21 LargeTransientTests(LTTs)
LTT-TurbineStopandControlValveTrips/GeneratorLoad Rejection
- TestPurpose:Verifytheresponseofthereactoranditscontrol systemstoturbine/generatortrip BrownsFerryhadactualplanttransientsinthepastseveralyears Refertothetableonthenextslide
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 22 ELTR1TransientTestingApplicability
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 23 NUREG0800,Section14.2.1,providesguidance/criteriato justifyeliminatingtests (a)
PreviousOperatingExperience (b)
NewThermalHydraulicPhenomenaorSystemInteractions (c)
ConformancewithLimitationofAnalyticalMethods (d)
PlantStaffFamiliarizationwithFacilityOperationandEmergency OperatingProcedures(EOPs)
(e)
MarginReductioninSafetyAnalysisforAnticipatedOperational Occurrences (f)
GuidanceinVendorTopicalReports (g)
RiskImplications
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 24 (a)PreviousOperatingExperience(BrownsFerryandIndustry)
SimultaneousClosureallMSIVs BrownsFerry1-Unit1RestartTest,105%OLTP BrownsFerry2-LER50260/2010003,fromLossofReactorProtectionSystem Power,105%OLTP Dresden2(BWR3)- LER50237/2005002,fromHighMainSteamFlowdetectedat EHCSystem,117%OLTP Dresden2(BWR3)- LER50237/2006004,fromHighMainSteamFlowfroma MSIVfailingclosed,117%OLTP GeneratorLoadRejection BrownsFerry1(79%OLTP),2(79%OLTP),&3(105%OLTP)- LER50259/2011001, ScramCausedbyLossofAll500KvOffsitePower BrownsFerry1-LER50259/2009001,MainGeneratorTrip,105%OLTP BrownsFerry2-LER50260/2002002,MainGeneratorTrip,105%OLTP BrownsFerry3-LER50296/2007005,MainGeneratorTrip,105%OLTP BrownsFerry3-LER50296/2011003,MainGeneratorTrip,105%OLTP Susquehanna2(BWR4)- LER50388/2011003,MainTurbineTrip,120%OLTP HopeCreek(BWR4)- LER50354/2013008,MainTurbineTrip,115%OLTP
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 25 (a)PreviousOperatingExperience(BrownsFerryandIndustry)
Hatch1(BWR4)- LER50321/2005002,MainGeneratorTrip,115%OLTP Hatch2(BWR4)- LER50366/2006002,MainTurbineTrip,115%OLTP Hatch1(BWR4)- LER50321/2008003,MainTurbineTrip,115%OLTP Clinton(BWR6)- LER50461/2013002,MainGeneratorTrip,120%OLTP GrandGulf(BWR6)- LER50416/2013002,MainGeneratorTrip,115%OLTP OperatingExperienceshowsforMSIVClosureTransientandGeneratorLoadRejection BrownsFerry-responsewithindesignlimitswithmargintopredictedresults BWRsthathaveperformeduprateshavesuccessfullyrespondedto MSIVClosureTransientandGeneratorLoadRejection (b)NewThermalHydraulicPhenomenaorSystemInteractions Nonewthermalhydraulicphenomenaornewsysteminteractionswereidentified becauseofBrownsFerrysEPU (c)ConformancewithLimitationofAnalyticalMethods BrownsFerrysEPUhasnouniquelimitationsassociatedwithanalyticalmethods
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 26 (d)PlantStaffFamiliarizationwithFacilityOperationandEOPs EPUdoesnotchangeanyplantoperationsorEOPactionsassociatedwithaMSIV closuretransientorageneratorloadreject/turbinetriptransient ForEPU,domepressuredoesnotchange,noSafetyReliefValvesetpointchanges arerequired MSIVshavedesignfeaturesthatensureclosuretime FunctionofthePressureControlSystemandFeedwaterControlSystemwillnot changeforEPU PlannedEPUPowerAscensionTestingwillensureproperoperationofthese controlsystems AtleastonesimulatorwillbeupdatedtomodelEPUoperationincludingall modificationsandtransientanalyses SimulatorwillbeusedforoperatortrainingpriortoEPUimplementation BrownsFerryoperatorstrainonvariousplantupsetconditionsfrompostulated accidentconditionstoanticipatedtransients BrownsFerryhas>80operatingyearsofexperiencedealingwithtransients LTTswillnotprovideanynewoperatorinsight
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 27 (e) MarginReductioninSafetyAnalysisforAnticipatedOperational Occurrences MSIVClosure AmericanSocietyofMechanicalEngineers(ASME)OverPressurization AnalysisdocumentedinFuelSafetyAnalysisReportofEPULAR Analysisshowsthatadequatemarginsexisttoaccommodatecyclespecific variances,andtoensureallASMECoderequirementscontinuetobe satisfied Analysisisupdatedeachfuelcycle GeneratorLoadRejection Pressurizationtransientsanalyzedusingtheapprovedmethodology GeneratorLoadRejectionisnotalimitingeventanddoesnotresultina reductiontothemarginofsafety DifferencebetweenMSIVClosureandGeneratorLoadRejection(withno TBVs)isapproximately30to40pounds/squareinch
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 28 (f)GuidanceinVendorTopicalReports CLTR-doesnotrecommendLargeTransientTesting ELTR1-previouslydiscussed (g)RiskImplications-Preliminaryresults PreliminaryresultsindicatethatCCDPandCLERParenotinsignificant
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 29 Conclusion LargeTransientTestingnotrequiredforBrownsFerryEPUduetothe following BrownsFerrypreviouslyperformedLargeTransientTests,aspartoftheInitialStartup TestProgramorUnit1RestartProgram,anddocumentedacceptableresults BrownsFerryhasexperiencedLargeTransientsat105%OLTPandplantrespondsper design Industryoperatingexperienceindicatesplantswillcontinuetorespondtolarge transientsasdesignedfollowingEPUimplementation PotentialgainsfromfurtherLargeTransientTestingareminimal Produceunnecessaryandundesirabletransientandthermalcyclesontheprimary system Analyticalmethodsandtrainingfacilitiesadequatelysimulatelargetransientevents withouttheneedtoimposeactualevents PlantoperatorstobetrainedforpotentialEPUtransienteventsthroughtheuseof simulatormodelscontainingBalanceofPlanttransients ProbabilisticRiskAssessmentanalysisindicatesanincreasedriskofcoredamageand largeearlyreleaseifthetestsareperformed LargeTransientTestingisnotwarranted
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 30 OtherLTTs (notproposedtobereperformedforEPU)
- SingleFeedwater PumpTrip
- LossofFeedwater Heating
- RecirculationPumpTrips
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 31 Single Feedwater Pump Trip OriginalStartupTest TestPurpose:
Atfullpower,demonstratethatRecirculationRunbackfeaturetopreventalowwater scrambytripping1ofthe3Feedwater PumpTurbines Results:
MinimumReactorVesselwaterlevelwellabovescramsetpoint EPUMarginModifications UpgradeFeedwater Pumpstoallow2of3pumpstosupply100%EPUfeedwater flow Unit1RestartTesting At105%OLTP,trippedamainfeedwater pump Results:
Followingpumptrip,correcttransientresponsewasconfirmed
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 32 SingleFeedwater PumpTrip GETopicalReports:
ELTR1statesthatthesinglefeedwater pumptripresponseisnotaffectedbyapower uprateTheresponseisaffectedbytheflowcontrolline,anduprateusesthesame MaximumExtendedLoadLineLimitAnalysisflowcontrolthatBrownsFerryusesatCLTP CLTRstatesthistestingisnotrequiredsincecoreflowisunchanged TransientAnalysis:
Showsthatafeedwater pumptripatEPUoperatingconditionswouldnotresultinascram onLevel3
==
Conclusion:==
Theobjectiveofthistestisconsideredsatisfiedwithoutrequiringneworadditionaltransient testing.
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 33 LossofFeedwaterHeating OriginalStartupTest (Unit1Only)
TestPurpose:
From85percentpower,extractionsteamheatingforahighpressurefeedwaterstringwas isolatedtodemonstratetheplantsresponsetoinletsubcoolingchangesonreactorpower andpressure Results:
Resultedinapproximatelyatwenty(20)degreereductioninfeedwatertemperatureand lessthanfour(4)percentriseincorepower Allcoreparametersremainedwithinlimits OperatingExperience:
BrownsFerryUnit2hadaLossofFeedwater HeatingEventinMarch2014 ExtractionSteamtoastringoflowandhighpressureFeedwater Heatersisolatedfrom 105%OLTP PlantoperatorsenteredtheAbnormalOperatingInstructionsandloweredreactor power Powerwasfurtherreducedtocomplywithturbineloadingrequirements
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 34 LossofFeedwater Heating Analysis:
LossofFeedwater Heatingisafuelthermalmarginevent GenericallyaddressedintheCLTR LossofFeedwater HeatingtransientwasreanalyzedforEPUandfuelthermallimits wereacceptable ConfirmedgenericdescriptionintheCLTR ELTR1issimilartoCLTR
==
Conclusion:==
LossofFeedwater HeatingtestandBFNoperatingexperiencedemonstrateadequate plantresponsetotransient Plantspecifictransientanalysesdemonstrateacceptableresponserelativetofuel thermallimits Therefore,additionaltestingisnotnecessary
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 35 RecirculationPumpTrips OriginalStartupTest TestPurpose:
Evaluatetherecirculationflow,powerandleveltransientsfollowingtripsofoneorboth recirculationpumps Results:
Plantsystemsrespondedsatisfactorilyfollowingeachrecirculationpumptrip,core parametersremainedwellwithinlimits,andallacceptancecriteriaweresatisfied OperatingExperience:
SeveralRecirculationPumpTripshaveoccurredsincestartup BrownsFerry1:December2,2010,from104.8%OLTP-Controllerfailurecaused unexpectedshutdown BrownsFerry2:April23,2007,from104.9%OLTP-Electricalgroundcausedprotective relaytrip BrownsFerry3:June9,2004,from105%OLTP-Leakcausedrapidremovalfrom service Fortheseevents,thereactordidnotscramandplantsystemsrespondedasexpected
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 36 RecirculationPumpTrips Analysis:
Slightincreaseinrecirculationflowtoprovide100%coreflow ELTR1doesnotrecommendtriptesting Existinglargemargintohighleveltrip NotexpectedtosignificantlydecreaseatEPU CLTRstatesthistestingisnotrequiredbecauserecirculationflowonlychanges slightly
==
Conclusion:==
Reviewofinitialstartuptests,OperatingExperience,vendortopicalreport guidancedemonstratecontinuedsafeoperation Duetosmallincreaseinrecirculationflow,plantresponseisnotsignificantly affected Therefore,additionaltestingisnotnecessary
BFN EPU - Large Transient Testing (continued)
Browns Ferry EPU License Amendment Request Startup Test Plan l 37 Summary EPUStartupTestdevelopedfromthefollowing BrownsFerrysInitialStartupandPowerAscensiontesting TestingperformedduringStartupfromaRefuelingOutage PlantOperatingExperience IndustryOperatingExperiencefromotherBWRsthatimplementedEPU GETopicalReportsonEPU GuidanceinNUREG0800,Section14.2.1
BFN EPU - Acronym List Browns Ferry EPU License Amendment Request Startup Test Plan l 38 ELTR2-GEtopicalreportNEDC32523PA "GenericEvaluationsofGeneralElectric BoilingWaterReactorExtendedPower Uprate EOPs-EmergencyOperatingProcedures EPU-ExtendedPowerUprate GE-GeneralElectric LAR-LicenseAmendmentRequest LER-LicenseeEventReport LERF-LargeEarlyReleaseFrequency LTTs-LargeTransientTests MSIV-MainSteamIsolationValve NRC-NuclearRegulatoryCommission OLTP-OriginalLicensedThermalPower RAI-RequestforAdditionalInformation SRP-StandardReviewPlan,NUREG0800 TBVs-TurbineBypassValves TCVs-TurbineControlValves TSVs-TurbineStopValves UFSAR-UpdatedFinalSafetyAnalysis Report ASME-AmericanSocietyofMechanical Engineers BFN-BrownsFerryNuclearPlant BWR-BoilingWaterReactor CCDP-ConditionalCoreDamage Probabilities CDF-CoreDamageFrequency CLERF-ConditionalLargeEarlyRelease Frequencies CLTP-CurrentLicensedThermalPower CLTR-GETopicalReportNEDC33004PA "ConstantPressurePowerUprate CPPU-ConstantPressurePowerUprate ELTR1-GEtopicalreportNEDC32424PA "GenericGuidelinesforGeneralElectric BoilingWaterReactorExtendedPower Uprate"
BFN EPU - Questions/Comments Browns Ferry EPU License Amendment Request Startup Test Plan l 39