ML18041A188

LER 89-003-00:on 890212,noticed Erratic Operation of Main Feedwater Regulating Valve C & Turbine Trip/Reactor Trip Occurred Due to High Water Level in Steam Generator C.Caused by Valve Vibration & Hydraulic forces.W/890314 Ltr

ML18041A188
Person / Time
Site:	Beaver Valley
Issue date:	03/14/1989
From:	NOONAN T P DUQUESNE LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-89-003, LER-89-3, ND3SPM:0422, ND3SPM:422, NUDOCS 8903220424
Download: ML18041A188 (14)

Text

ACCELERATEDDISIKBUTIONDEMONSTRA.TIONSYSTEMREGULATINFORMATIONDISTRIBUTION+STEM(RIDE)ACCESSIONNBR:8903220424DOC.DATE:89/03/14NOTARIZED:NODOCKETFACIL:50-4lgBeaverValleyPowerStation,Unit2,DuquesneLightC05000412AUTH.NAMEAUTHORAFFILIATIONNOONANFT.P.DuquesneLightCo.RECIP.NAMERECIPIENTAFFILIATION

SUBJECT:

LER89-003-00:on890212,reactortrippedduetomainfeedwaterregulatingvalvefailure.W/890314ltr.W/8DISTRIBUTIONCODE:IE22DCOPIESRECEIVED:LTRtENCLISIZE:TITLE:50.73LicenseeEventReport(LER),IncidentRpt,etc.NOTES:LPDR2cysTranscripts.LPDR2cysPDRDocuments.Applicationforpermitrenewalfiled.05000412RECIPIENTIDCODE/NAMEPDl-4LATAMFPINTERNAL:ACRSMICHELSONACRSWYLIEAEOD/DSP/TPABARM/DCTS/DABNRR/DEST/ADE8HNRR/DEST/CEB8HNRR/DEST/ICSB7NRR/DEST/MTB9H.NRR/DEST/RSB8ENRR/DLPQ/HFB10NRR/DOEA/EAB11NRR/DREP/RPB10NUDOCS-ABSTRACTRES/DSIR/EIBRGN1FILE01EXTERNAL:EGSGWILLIAMSFSHSTLOBBYWARDNRCPDRNSICMURPHYFG.ANOTES:COPIESLTTRENCL111111111111111111111111112211111144111'1122RECIPIENTIDCODE/NAMEPD1-4PDACRSMOELLERAEOD/DOAAEOD/ROAB/DSPDEDRONRR/DEST/ADS7ENRR/DEST/ESB8DNRR/DEST/MEB9HNRR/DEST/PSB8DNRR/DEST/SGB8DNRR/DLPQ/QAB10NRR/DREP/RAB10NRRJ3/SIB9AREGFjj02RES/DSR/FRABFORDBLDGHOYFALPDRNSICMAYSFGCOPIESLTTRENCL112211221110111111111111111111111111NOZE'IOALL'RIDS"RICIPZEPIS:PIZASEHELPUSIOIlEDUCE%ASTlCGKPACTIHEDCjCUNEÃZCGÃIK)LDESKFROC'l-37(EXT.20079)%0EIZKBRXSYOURMHBHKHDISTBZBUTICNLIBTSFORDOC(IMENISYOUDQHFTNEED<TOTALNUMBEROFCOPIESREQUIRED:LTTR47ENCL46

NRCForm388(9.83)I(LICENSEEEVENTREPORTILER)U.S.NUCLEARREGULATORYCOMMISSIONAPPROVEOOMBNO.31504104EXPIRES:8/31/88FACILITYNAMEIIITITLE(4)ReactorTripDuetoMainFeedwaterRegulatingValveFailureDOCKETNUMBER(2)05000PAGE3/1OF0FVENTDATE(5)LERNUMBER(5)REPORTDATEI7)OTHERFACILI'TIFSINVOLVED(8)MONTHOAYYEARYEARSEGVENTIALNVMSEAyh'.REVISION'AiNUMBERMONTHOAYYEARFACILITYNAMESDOCKETNUMBER(s)0500021289890030003489N/A05000OPERATINGMODE(SIPOWERLEYELP55(10)5?'PNryr'Q?yr'rc'yvynHXrg?e"@.gp.'0.402(bl20.405(el(Ii(i)20.405(el(1)(ii)20.405(eI)II(ii))20.405(~l(l)IIv)20.405(~l(1)(vl20A05(cl50.35(cl(II50.35IcI(2)5073(el(2)li)d0.73(~l(2)(i/I50.73(e)(2I(iii)LICENSEECONTACTFORTHISLER(12)50.73(e)(2)(iv)50.73(~)(2)(v)50,73(~)(21(viil50.73(~)(2)(wii)IAI50.73(~)12)(wii)IBI50.73(~)(2)(rrl0THEREOUIREMENTSOF10CFR(I:/CheckoneormorcOItncIoliowrnP/(11)THISREPORTISSUBMITTEDPURSUANTT73.71(b)73.71IclOTHER/SpetiryInAprrreCtoe/owenriinTert,NIICForm366AINAMEMr.ThomasP.Noonan,PlantManagerTELEPHONENUMBERAREACODE412643-125COMPLETEONELINEFOREACHCOMPONENTFAILUREOESCRIBEOINTHISREPORT(13)CAUSESYSTEMCOMPONENTMANUFAC.TURERREPORTABLEpCAUSESYSTEMCOMPONENTMANVFAC.TVRERXJBFCVC635Y$P:,".'SVPPLEMEN1'ALREPORTEXPECTFD(14)YES//Iycr,comp/etcEXPECTEDSU84IISSIOIYDATE/ABSTRACTILimrtto/400rpeccr./c,,epprovimeteiy/i/teenr/npletortetyPcwrinen/inn/l(d)EXPECTEDSU8MISSI0NDATE(15IMONTHOAYYEARNRCForm358(983)On2/12/89,withtheUnitinPowerOperation,apowerreductionfrom904reactorpowerto50%reactorpowerwasinprogressaspartofEndofCoreLifeprograms.At0048hours,operatorsnoticederraticoperationofthe"C"MainFeedwaterRegulatingValve(MFRV).Theoperatorsplacedthe"C"MFRVinmanualtocontrolsteamgeneratorlevel.At0108hoursatapproximately55~reactorpower,the"A"MainFeedwaterPumpwasshutdowntoreducethepressuredifferentialacrossthevalveallowingeasiervalvemovementandcontrol.At0120hours,aturbinetrip/reactortripoccurredduetoahighwaterlevelinthe"C"steamgenerator.TheoperatorsstabilizedtheplantinHotShutdownutilizingtheEmergencyOperatingProcedures.TheHC"MFRVwasfoundtohaveshearedanti-rotationpinsandthestemdetachedfromthevalveplug.Thecauseforthevalvefailurewasattributedtohydraulicforcesandvibrationactingovertime.TheMFRVswerealldisassembled,inspectedandrepairedasnecessary.ThiseventwasreportedtotheNuclearRegulatoryCommissionat0300hours,inaccordancewith10CFR50.72.b.2.ii.Therewerenosafetyimplicationstothepublicasaresultofthisevent.ThistypeofeventhaspreviouslybeenanalyzedasstatedintheUpdatedFinalSafetyAnalysisReport,Section15.1.2,"FeedwaterSystemMalfunctionsCausinganIncreaseInFeedwaterFlow".89032204248903i4$)PDRADOCK05000412SPNU

NRCForm3SSA(943)LICENSEEEENTREPORTILER)TEXTCONTINUATIONU.S.NUCLEARRFOULATORYCOMMISSIONAPPROVEDOMBNO.3150-CI04EXPIRES:8/3)/88FACILITYNAME<<IDOCKETNUMBER)2ILERNUMBER)8)i+:SEQUENTIALSFINUMS8rrRFVISIONNUMBERPAGE)3)BeaverValleyPowerStation,Unit2ppppp412TEXT///rrroroH>>co/rroqo/rod.o>>odd/I/orM/HRCForm36548l<<7)890030002QF04DESCRIPTIONOn2/12/89,withtheUnitinPowerOperation(OperatingMode1),Operationspersonnelwerereducingreactorpowerfrom90%to50<aspartofEndofCoreLifeprograms.PriortotheOperatingcrewassumingtheshiftat2300hourson2/11/89,the<<B<<MainFeedwaterRegulatingValve(MFRV)hadpreviouslyexhibitederraticvalvecontrolforsteamgeneratorwaterlevel.The<<B<<MFRVwasintheautomaticmode,however,thevalvewasnotcontrollingsmoothly.At0048hours,operatorsnoticederraticoperationofthe<<C<<MFRV.At0108hours,atapproximately554power,the<<A<<MainFeedwaterPumpwasshutdown.At0120hours,thewaterlevelinthe<<C<<steamgeneratorincreasedtothehigh-highlevelsetpoint(75%)causing.aturbinetripandfeedwaterisolationsignal.Theturbinetripcausedareactortrip,sincereactorpowerwasabovethetrippermissiveof49'.Thefeedwaterisolationsignalcausedthefollowingactionstooccur:1)tripoftherunningmainfeedwaterpump,2)auto-startoftheauxiliaryfeedwaterpumps,and3)closureofthemainfeedwaterregulatingvalvesandbypassvalves.Followingthereactortrip,theoperatorsutilizedtheEmergencyOperatingProcedures(E-0"ReactorTriporSafetyInjection<<andES-0.1"ReactorTripResponse")tostabilizetheplantinHotStandby(OperatingMode3).APPARENTCAUSEOFTHEEVENTThecauseforthiseventwasattributedtothefailureofthe<<C<<Main.FeedwaterRegulatingValve(2FHS*FCV498).ThisvalveisaCopes-Vulcan,ModelNo.D-100-160,PartNo.16-FA37RG.Thevalvefailurewasattributedtothehydraulicforcesandvibration,whichovertime,mechanicallyexcitethevalve,damagingtheanti-rotationcageslots,plugguides,retainingpinsandvalvestem.The<<B<<MainFeedwaterRegulatingValvewasfoundtohavedamagedanti-rotationpins.Nr)CFORM300AIS83)'U.S~CPCI)988-33<')09000)0

NRCForm366A194)3)LICENSEEENTREPORT(LERITEXTCONTINUAONU.S.NUCLEARREGULATORYCOMMISSIONAPPROVEDOMBNO.3160&)04EXPIRES:8/31/88FACILITYNAME(1)DOCKETNUMBER(2)YEARLERNUMBER(6)SEQUENTIAL+"'2REVISIONNVM8ER):.1NUMSSRPAGE(3)BeaverValleyPowerStation,Unit2osooo41289TEXT/lfmorospinto/4rtr)o/rod,ototddr)/ono/IVRCForm3664'4/OS)0030003oF04CORRECTIVEACTIONSThefollowingcorrectiveactionsweretakenasaresultofthisevent:Immediate:1).OperationspersonnelutilizedtheEmergencyOperatingProcedurestostabilizetheplantinHotStandby.2).Themainfeedwaterregulatingvalvesweredisassembledandinspected.Theanti-rotationpinswerereplacedonallmainfeedwaterregulatingvalves.Long-term:AnEngineeringMemorandumhasbeengeneratedrequestingEngineeringtoidentifyanactuatorandvalvedesignwhichwilleliminatethemainfeedwaterregulatingvalveproblemsduetothehydraulicforcesandvibrationwhichovertime,progressivelydamagethevalves.2).AllthreesteamgeneratorswillbeinspectedduringtheFirstRefuelingOutageforpotent'iallooseobjects.SAFETYIMPLICATIONSTherewerenosafetyimplicationstothepublicasaresultofthisevent.ThistypeofeventhaspreviouslybeenanalyzedasstatedintheUpdatedFinalSafetyAnalysisReport(UFSAR),Section15.1.2,"FeedwaterSystemMalfunctionsCausinganIncreaseinFeedwaterFlow".Additionally,alltherequiredEngineeredSafetyFeatures(ESF)systemcomponentsactuatedasfollowsasaresultofthesteamgeneratorhigh-highwaterlevelcondition1).Turbinetrip,causingareactortripbecausereactorpowerwasgreaterthantheP-9trippermissive,2).Feedwaterfollowing:Isolation(FWI)signal,causingtheNRCFORM34OA(94)3)A).Tripoftherunningmainfeedwaterpump,B).Automaticstartoftheauxiliaryfeedwaterpumps2FWE*P22,23Aand23B),C).Closureofthemainfeedwaterregulatingvalvesandbypassvalves.~V.S.CPOI)988-920-889~OOOTO

NRCForm388A(94)3)LICENSEEENTREPORTILER)TEXTCONTINUAONV.S.NUCLEARREGULATORYCOMMISSIONAPPROVEDOMBNO.3)50&)04EXPIRES:8/31/88FACILITYNAME(I)DOCKETNUMBER(2)LERNUMBER(8)YEARggSEOUENTIALPP?rNUMBER.Rrr.REvrsKINNUMBERPAGE(3)8eavergallePowerStation,Unit2osooo412TEXTIIImoroZ>>oo/4re/rr/rod,IrooEdcNane/HRC%%dmr36849/lll)890030004OF04Inaddition,theNuclearSteamSystemSupplier(NSSS)hasevaluatedtheutility'sengineeringinterpretationoftheSteamGeneratorParametricLooseObjectLicensingReport(WCAP-12101),whichaddressedthesafetysignificanceofthepotentialloosepart(anti-rotationpinfrom2FWS*FCV498)whichcouldbetrappedinthe"C"steamgeneratortubesheetannulus.Itwasconcludedthattheestimatedtimerequiredforthelooseobjecttowearintoatubetotheminimumallowablewallthickness,is2.4years.TheNSSSconcurredwiththissafetyevaluationjustifyingcontinuedoperationoftheremainingoperatingcycle.REPORTABILITYThiseventwasreportedtotheNuclearRegulatoryCommissionat0300hoursinaccordancewith10CFR50.72.b.2.ii.Thiswrittenreportisbeingprovidedinaccordancewith10CFR50.73.a.2.iv,asaneventinvolvingareactorprotectionsystem(RPS)orengineeredsafetyfea'tures(ESF)systemactuation.PREVIOUSOCCURRENCESTherehavebeennopreviousLicenseeEventReportsissuedonthistypeofevent/equipmentfailureatBeaverValleyPowerStationUnit2.NRCFORM388Al94)3)AU.S.GPOrIOSSSSBSSPI)0r)10

gled~DuquesneltNuclearGroupP,O,Box4ShippingporhPA15077~TelephOne(412)393-6000March14,1989ND3SPM:0422BeaverValleyPowerStation,UnitNo.2DocketNo.50-412,LicenseNo.NPF-73LER89-003-00UnitedStatesNuclearRegulatoryCommissionDocumentControlDeskWashington,DC20555Gentlemen:InaccordancewithAppendixA,BeaverValleyTechnicalSpecifications,thefollowingLicenseeEventReportissubmitted:LER89-003-00,10CFR50.73a.2.iv,"ReactorTripDuetoMainFeedwaterRegulatingValveFailure".Verytrulyyours,T.P.NoonanPlantManagervhyAttachment

March14,1989ND3SPM'0422PagetwoCC:Mr.WilliamT.RussellRegionalAdministratorUnitedStatesNuclearRegulatoryCommissionRegion1475AllendaleRd.KingofPrussia,PA19406C.A.Roteck,OhioEdisonMr.PeterTam,BVPSLicensingProjectManagerUnitedStatesNuclearRegulatoryCommissionWashington,DC20555J.Beall,NuclearRegulatoryCommission,BVPSSeniorResidentInspectorMr.AlexTimme,CAPCONuclearProjectsCoordinatorToledoEdisonINPORecordsCenterSuite15001100Circle75ParkwayAtlanta,GA30339G.E.Muckle,FactoryMutualEngineering,PittsburghMr.J.N.Steinmetz,OperatingPlantProjectsManagerMidAtlanticAreaWestinghouseElectricCorporationEnergySystemsServiceDivisionBox355Pittsburgh,PA15230AmericanNuclearInsurersc/oDottieSherman,ANILibraryTheExchangeSuite245270FarmingtonAvenueFarmington,CT06032Mr.RichardJanatiDepartmentofEnvironmentalResourcesP.O.Box206316thFloor,FultonBuilding*Harrisburg,PA17120Director,SafetyEvaluation&ControlVirginiaElectric6PowerCo.P.O.Box26666OneJamesRiverPlazaRichmond,VA23261

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