ML17251A537

LER 89-002-00:on 890506,safeguards 480 Volt Bus 14 Tripped During Offsite Power Mod Relay Testing.Caused by Typo in Mod Test Procedure That Called for Wrong Terminal Block to Be Opened.Error corrected.W/890605 Ltr

ML17251A537
Person / Time
Site:	Ginna
Issue date:	06/05/1989
From:	BACKUS W H, MECREDY R C ROCHESTER GAS & ELECTRIC CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-89-002, LER-89-2, NUDOCS 8906140291
Download: ML17251A537 (16)

Text

~ACCELEP<TEDDlSTMBt'T10%DEMO~STRXT104&ZTEkREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:8906140291DOC.DATE:89/06/05NOTARIZED:NOFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterGAUTH.NAMEAUTHORAFFILIATIONBACKUS,W.H.RochesterGas&ElectricCorp.MECREDY,R.C.RochesterGas&ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONDOCKETg05000244

SUBJECT:

LER89-002-00:on890506,safeguardsbusundervoltageduringrelaytestingduetoinadequateprocedurereview.W/8DISTRIBUTIONCODE:IE22TCOPIESRECEIVED:LTRENCLSIZE:TITLE:50.73/50.9LicenseeEventReport(LER),IncidentRpt,etc.NOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244RECIPIENTIDCODE/NAME'D1-3,LAJOHNSON,AINTERNAL:ACRSMICHELSONACRSWYLIEAEOD/DSP/TPABDEDRONRR/DEST/ADE8HNRR/DEST/CEB8HNRR/DEST/ICSB7NRR/DEST/MTB9HNRR/DEST/RSB8ENRR/DLPQ/HFB10NRR/DOEA/EAB11NUDOCS-ABSTRACTRES/DSIR/EIBRGN1FILE01EXTERNAL:EG&GWILLIAMS,SLSTLOBBYWARDNRCPDRNSICMURPHYIGACOPIESLTTRENCL1111111111111111111111111111-11114'4111111RECIPIENTIDCODE/NAMEPD1-3PDACRSMOELLERAEOD/DOAAEOD/ROAB/DSPIRM/DCTS/DABNRR/DEST/ADS7ENRR/DEST/ESB8DNRR/DEST/MEB9HNRR/DEST/PSB8DNRR/DEST/SGB8DNRR/DLPQ/PEB10REB/RPB10EGF02PRABFORDBLDGHOY,ALPDRNSICMAYS,GCOPIESLTTRENCL11221122111011.11111111221111111111DSDSNOrE'IOALL>>RIDS>>RECZPZZNrS:PLEASEHELPUSK)REDUCEWASTE!CGNZACT'IHEDCKX>~rCXÃZK)LDESK,RXNPl-37(EXr.20079)K)ELIMINATEYOURNAME~DIBTRIBVTIONLISTSR)RDOCUMENISYOUDON'TNEED!~TOTALNUMBEROFCOPIESREQUIRED:LTTR43ENCL42DDS

ROCHESTERGASANDELECTRICCORPORATION~89EASTAVENUE,ROCHESTER,N.Y.14649.0001June5,1989U.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,DC20555

Subject:

LER-89-002,SafeguardsBusUndervoltageDuringRelayTestingDueToInadequateProcedureReviewCausesthe"A"EmergencyDieselGeneratorToAutomaticallyStartandAcceptLoadR.E.GinnaNuclearPowerPlant.DocketNo.50-244Inaccordancewith10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv)whichrequiresareportof,"anyeventorconditionthatresultedinmanualorautomaticactuationofanyEngineeredSafetyFeature(ESF)includingtheReactorProtectionSystem(RPS)",theattachedLicenseeEventReportLER-89-002isherebysubmitted.Thiseventhasinnowayaffectedthepublic'shealthandsafet:y.XC:Verytrulyyours,RobertC.MecreGeneralManagerNuclearProductionU.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaUSNRCSeniorResidentInspector890614029k890605PDRADOCK05000244PDC 0

eeACterre200I04)ILICENSEEEVENTREPORT(LER)US.NVCLCAAACOULATO1YCOMMlSEIONAttAOVCOOMOHO.2(500(OreEX41500/Er/05FACILITYNAMElllR.E.GinnaNuclearPowerPlantOOCXCTNVMOCAQl060004410F06aegususnervotageDuringReayTestingDueToInadequateProcedureReviewCausesTheNANEmerencDieselGeneratorToStartandAcceCVCIITCATEI~ILCANVMEEA(4ACFOATOATCIIIOTNC1FACILITIECINVOLVCOIIIMOHTreOAYYEA)IYEAN550UlNTIALee"ACVAIOeeNUM051rhreUeeetAMONTHOAYYEAN~ACILITYreAULOOOCXCTHVMOCA(5)0500005068989002006058905000Ot5AATINCMOOC(0)FOIYC1LcvcL000'CHICt)CFOIITICCUOMITTCOW15VAHTT00.)24)4Illrl~OQ24IQIlrl~O.Tl(e)QI(re)50,724)Q)lrW)IAI~OQ24)(l)(rWIIOI50.)l(~)Q)I~I20.e00(el00J4(el()i~OM(e)QI00.224IQII450,224)QI(0)50.724I4IIWl10.002(0)20.000(e)ll)IO20.400ie)I)II5ISO.COO4)I)l(WI20ACE4)(l)(H)2O.COE4)IIlleILICCHCCECONTACTtOll'TNICLEAIll)0THChlovIACMCNTCOt10cthfj:/creterereeerrerelIIeeleIIeeeeet/Ill22.)1(01TS.TI(e)OTHCA/StecrryIeAArrrectterrarertIeTrrLHACteeterJCOA/NAMEWesleyH.BackusTechnicalAssistanttotheOperationsManaerAt(CACOOC315TCLCFHOHCHUMEEACOMtLCTCONELINCtOACACNCOMFONENTFAILU15OCCCAIECOINTHISACFOATIll)CAV5E5YCTCMCOUFOHCHTMAHUFA('eTUACAEtOrll'AEI,C4,'~yec+jgt@COMFOHEN'TMANVFACTVAEAEFOATAOLIP;44%~@y+<4EUttLCMCNTALACFOATCXFECTCO(l4YCC/I/yre,cterterreCXFCCTCOSVSMISSIOHOATS/HOAJCTAACTIL/eUtcetaxiterra,tr..rtteererrere/yIIIHarrletrretecrtytear1HeHere)IIOIAxex)yh.MONTHCAYYCAAEXFCCTCOLUIM<$5)ONCATEIIIIOnMay6,1989at0946EDSTwiththereactorintheCold/RefuelingShutdownCondition,safeguards480voltBus14trippedduringoffsitepowermodificationrelaytesting.ThiscausedtheQAQEmergencyDieselGeneratortoautomaticallystartandconnecttosafeguards480voltBus14.TheunderlyingcauseoftheeventwasduetoatypographicalerrorintheModificationTestProcedurethatcalledforthewrongterminalblocktobeopenedforblockingtheabovebustrip.Thistypographicalerrorwasduetoinadequateproofread-ingoflastminutechangestotheprocedure.Correctiveactiontakenwastoidentifyandcorrecttheprocedureerrorandtorestoresafeguards480voltBus14toitsnormalpowersupply.NACFreer200(&45)

fjHACFarmSSSAlslslLICENSEEEVENTREPORTILER)TEXTCONTINUATIONU.S.IIUCLSA+IIlOULATOIYCOMMISSIOMAFFIIOYSOOMsIIOSISO&IOoSXFIASSSISIISSFACILITYSIAM@IIIR.E.GinnaNuclearPowerPlant:TxxT/IFmoreAMoeeleeveee.VeeeoebFoneFHEMICfoml~'llIITSosooo24489LSIIIIUMSSIILSISSQVSHTIALMVMSA002ASYISIONMVMSe-00020~06I~PRE-EVENTPLANTCONDITIONSTheunitwasincold/refuelingshutdownfortheAnnualRefuelingMaintenanceOutage.Anoffsitepowerreconfigura-tionmodificationwasinprogressperERR-4525.DESCRIPTIONOPEVENT'.DATESANDAPPROXIMATETIMESFORMAJOROCCURRENCES:oMay6,1989,0946EDST:Eventdateandtime.'May6,1989,0946EDST:Discoverydateandtime.oMay6,1989,0952EDST:SafeguardsBus14NormalPowerSupplyRestored.oMay6,1989,0952EDST:SafeguardsBus14"A"EmergencyDieselGeneratorPowerSupplyTerminatedand"BssEmergencyDieselGeneratorStoppedandLinedUpforAutoStandby.B.EVENT:OnMay6,1989at0946EDST,thereactorwasinthecold/refuelingshutdowncondition.Relaytestingwasinprogresson4160voltsafeguardsBus12Aperstep6.2.5.1.1ofstationmodificationprocedureSM-4525.15.Duringtheperformanceofrelaytestingon12A,differentialrelay87B/12Aoperatedlockoutbusrelay86B/12A,whichtrippedthestationservicetransformerbreaker(14SS-4160V)causinganunder-voltageconditionon480voltsafeguardsBus14.The"A"EmergencyDieselGeneratorAutomaticallystarted,asrequired,duetotheundervoltageconditionon480voltsafeguardsBus14andsub-sequentlyconnectedtoBus14asrequired.'vACFOAMSSSAIS4SI 4

NRCtat~2SSAI0421LICENSEEEVENTREPORT(LER)TEXTCONTINuATIONU.S,NUCLCARRlOULATORYCOMMISSIONAttROVCOOMSNO2150MI04Txt>RSSSISICSStACILITYNAMEIIIOOCKCTNUM02R12ILSRNUM02RISI*SSOVSNTIALNUMSRRSVOlONNUMSRtAOII21R.E.GinnaNuclearPowerPlantT29cTIlfececeNwcee~eeeacccRAeMINJICFcecn~'elIITIosooo24489002-0003OF06C.D.E.INOPERABLESTRUCTUREStCOMPONENTStORSYSTEMSTHATCONTRIBUTEDTOTHEEVENT:None.OTHERSYSTEMSORSECONDARYFUNCTIONSAFFECTED:None.METHODOFDISCOVERY:TheeventwasimmediatelyapparentduetoalarmsandindicationsintheControlRoom.F.OPERATORACTION:FollowingtheBus14undervoltageand"ATIEmergency-DieselGeneratorAutomaticStartandtheTieBreakerClosuretoBus14,theControlRoomOperatorsimmed-iatelyverifiedpropervoltageonBus14andthatthe"A"EmergencyDieselGeneratordisplayedpropervoltageandfrequency.G.SAFETYSYSTEMRESPONSES:The"A"EmergencyDieselGeneratorautomaticallystartedandtiedinto480voltsafeguardsBus14duetoavalidundervoltagesignalonBus14.IZZ.CAUSEOPA.IMMEDIATECAUSE:Theautomaticactuationofthe"A"EmergencyDieselGeneratorandsubsequenttieintoBus14wasduetoavalidundervoltagesignalfromtheBus14undervoltagemonitoringsystem.wRcfoRMssee<942I

NIICFaNNS~SA10451LICENSEEEVENTREPORTILER)TEXTCONTINUATIONU.S.NUCLSAIIIISOULATOIITCOMMISSIONAFFAOVEOOMSNO315OWIOISKFIIISSSISIISSFACILITYNAMS111R.E.GinnaNuclearPowerPlant'fQ(TIJTmaatt5ttitItt~Katt~)YACCFaaIIIJC54'll(171OOCKSTNUMSEIIIllosooo24489LSIINUMSSIII~I550V5N'IIALHVMtIII002hlVISIONNVMtta00040i06B.INTERMEDIATECAUSE:Thevalidundervoltagesignalwasduetoanoperationof86B/12Alock-outrelayduringBus12Arelaytestingwhichinadvertentlytrippedthestationservicetransformerbreaker(14SS-4160V)toBus14.The86B/12Alock-outrelaytripcontactsforbreaker(14SS-4160V)werenotblockedfromoperatingpriortotestingbecauseofatypographicalerrorintheSM-4525.15procedurewhichcalledforthewrongterminalblocktobeopenedforblockingthetrip(i.e.TFH-10wasopenedandTFF-10shouldhavebeenopened).C.ROOTCAUSE:Therootcauseoftheeventwasaninadequatetechnical.proofreadingreviewofaretypedversionofSM-4525.15subsequenttosomelastminutechanges.Thisledtothetypographicalerrorthatcausedtheeventnotbeingidentifiedandcorrectedpriortotheproceduresuse.ANALYSISOFEVENTTheeventisreportableinaccordancewith10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv),whichrequiresreportingof,"anyeventorconditionthatresultedinmanualorautomaticactuationofanyEngineeredSafetyFeature(ESF)includingtheReactorProtectionSystem(RPS)".Thestartingofthe"A"EmergencyDieselGeneratorwasanautomaticactuationofanESFsystem.Anassessmentwasperformedconsideringboththesafetyconsequencesandimplicationsofthiseventwiththefollowingresultsandconclusions:NIICFOSMSCA5ll

NIICfarm554A10411LICENSEEEVENTREPORTILER)TEXTCONTINUATIONU.S.NUCLfAIIASOULATONYCOMMISSIONAffIIOVfOOMSNOSISOWIOSfX~Illf5llSI/555ACILITTNAM5I1IOOCIIfTNUMlfllIf)LfllNUMOflIISISSQVSHTIIL>>VLI51rr5vrsroNrrV>>SAfAOfISIR.E.GinnaNUclear'PowerPlant>getIIfmoreN>>ce>>reer>>ee.r>>eosrv>>reIHlICforrrr~5IIITIosooo24489-0020005OF06Therewerenooperationalorsafetyconsequencesorimplicationsattributedtothestartingofthe"A"EmergencyDieselGeneratorandsubsequenttiebreakerclosuretoBus14because:00The"A"EmergencyDieselGeneratorandtie-breakerclosuretoBus14operatedasdesigned.Bus14normalpowerwasrestoredinapproximately6minutes.0Theothertrainofsafeguardspowerwasenergizedandavailableatalltimes.0Offsitepowerwasavailablethroughouttheevent.V.CORRECTIVEACTIONA.ACTIONTAKENTORETURNAFFECTEDSYSTEMSTOPRE-EVENTNORMALSTATUS:0.Theerrorintheprocedurewasidentifiedandchanged.Theterminalblockswerethenchangedtotheirrequiredpositions.0NormalpowerwasrestoredtoBus14andthe"A"EmergencyDieselGeneratorwasstoppedand'ealignedforautomaticstandby.NIICf0Irrrr554LIS551

N(ICrrrM555A19r151LICENSEEEVENTREPORTILER)TEXTCONTINUATIONU.5.NUCLCAII(15QULA'IOIIYCOMMISSIONATTIIOVSOOMONO,5190WIOS5XI'1155e(SI(55SACILITYNAMC111R.E.GinnaNuclearPowerPlant55XT((I'rr(rerrneaeeCwtrrMMSAS((Y(ICFeme~'r(117)OOCI(5TNU~SII111o5ooo24489LlllNUMOlllI~ISSOUSNTIALNUMSw-002iSVISIOHNUM~A-0rAOS1510606B.ACTIONTAKENORPLANNEDTOPREVENTRECURRENCE'Theexistingstationpolicyandguidanceonprocedurechangeproofreadingandtechnicalreviewwasre-evaluatedandisadequate.Theneedforadherencetothispolicywasre-inforcedbyissuanceofalettertotheappro-priategroupsbythemodificationsupportcoordinator.0Theconsequencesoftheinadequatetechnicalreviewwillbereviewedagainwiththoserespon-sibleforpreparingmodificationtestprocedures,priortothe1990AnnualRefuelingandMaintenanceOutage.0Meaningfulcut-offdateswillbeestablishedforengineeringdesignoutputsforthel990outage,toensureadequatereviewofallrequiredtests,andprevent"lastminuterequirementsfrombeinginsertedintotestprocedureswithoutadequatetechnicalreview."VI.ADDITIONALINFORMATION:A.B.FAILEDCOMPONENTS:None.PREVIOUSLERsONSIMILAREVENTS:AsimilarLEReventhistoricalsearchwasconductedwiththefollowingresults:NodocumentationofsimilarLEReventswiththesamerootcauseatGinnaStationcouldbeidentified.C.SPECIALCOMMENTS:None.NACrOklM'SSSA<9551 if