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{{#Wiki_filter:('A'19'(90RYjREGULARYINFORMATIONDISTRIBUTISYSTEM(RIDS)1ACCESSIONNBR:9609130028DOC.DATE:96/09/05NOTARIZED:NODOCKETFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterG05000244AUTH.NAMEAUTHORAFFILIATIONMARTIN,J.T.RochesterGas&ElectricCorp.MERCREDY,R.C.RochesterGasaElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONVISSINGiG.S.
{{#Wiki_filter:('A'19'(90RYjREGULARYINFORMATION DISTRIBUTI SYSTEM(RIDS)1ACCESSION NBR:9609130028 DOC.DATE:
96/09/05NOTARIZED:
NODOCKETFACIL:50-244 RobertEmmetGinnaNuclearPlant,Unit1,Rochester G05000244AUTH.NAMEAUTHORAFFILIATION MARTIN,J.T.
Rochester Gas&ElectricCorp.MERCREDY,R.C.
Rochester GasaElectricCorp.RECIP.NAME RECIPIENT AFFILIATION VISSINGiG.S.


==SUBJECT:==
==SUBJECT:==
LER96-011-00:on960807,improperconfigurationofcircuitbreakeroccurred.Duetoundetectedinternalinterference,resultinginautomaticstartofbothauxiliaryfeedwaterpumps.RunningAFWpumpsweresecured.W/960905ltr.DISTRIBUTIONCODE:IE22TCOPIESRECEIVED:LTR/ENCL(SIZE:TITLE:50.73/50.9LicenseeEventReport(LER),incidentRpt,etc.NOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244ERECIPIENTIDCODE/NAMEPD1-1PDINTERNAL:E./Mig/EQBFILECENA~/5E/EELBNRR/DRCH/HHFBNRR/DRCH/HOLBNRR/DRPM/PECBNRR/DSSA/SRXBRGN1FILE01COPIESLTTRENCL112211111111111111RECIPIENTIDCODE/NAMEVISSING,G.AEOD/SPD/RRABNRR/DE/ECGBNRR/DE/EMEBNRR/DRCH/HICBNRR/DRCH/HQMBNRR/DSSA/SPLBRES/DSIR/EIBCOPIESLTTRENCL1111111111111111D0EXTERNAL:LSTLOBBYWARDNOACMURPHY,G.ANRCPDR111111LITCOBRYCE,JH.'vACPOORE,W.NUDOCSFULLTXT221111NNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFNSD-5(EXT~415-2083)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEEDlFULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOP,;-~SREQUIRED:LTTR25ENCL25 4NDROCHESTERGASANDELECTRICCORPORATION~89EASTAVfNUE,ROCHESTER,N.YId6d9000I7AREACODE7165d62700ROScRTC.MECREDYVcePresidentNvctearOoerrst'orsSeptember5,1996U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:GuyS.VissingProjectDirectorateI-1Washington,D.C.20555
LER96-011-00:on 960807,improper configuration ofcircuitbreakeroccurred.Due toundetected internalinterference, resulting inautomatic startofbothauxiliary feedwater pumps.RunningAFWpumpsweresecured.W/960905 ltr.DISTRIBUTION CODE:IE22TCOPIESRECEIVED:LTR
/ENCL(SIZE:TITLE:50.73/50.9 LicenseeEventReport(LER),incidentRpt,etc.NOTES:License Expdateinaccordance with10CFR2,2.109(9/19/72).
05000244ERECIPIENT IDCODE/NAME PD1-1PDINTERNAL:
E./Mig/EQB FILECENA~/5E/EELBNRR/DRCH/HHFB NRR/DRCH/HOLB NRR/DRPM/PECB NRR/DSSA/SRXB RGN1FILE01COPIESLTTRENCL112211111111111111RECIPIENT IDCODE/NAME VISSING,G.
AEOD/SPD/RRAB NRR/DE/ECGB NRR/DE/EMEB NRR/DRCH/HICB NRR/DRCH/HQMB NRR/DSSA/SPLB RES/DSIR/EIB COPIESLTTRENCL1111111111111111D0EXTERNAL:
LSTLOBBYWARDNOACMURPHY,G.A NRCPDR111111LITCOBRYCE,JH.'vACPOORE,W.NUDOCSFULLTXT221111NNOTETOALL"RIDS"RECIPIENTS:
PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFNSD-5(EXT~415-2083)
TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEEDlFULLTEXTCONVERSION REQUIREDTOTALNUMBEROFCOP,;-~SREQUIRED:
LTTR25ENCL25 4NDROCHESTERGASANDELECTRICCORPORATION
~89EASTAVfNUE,ROCHESTER,N.Y Id6d9000I 7AREACODE7165d62700 ROScRTC.MECREDYVcePresident NvctearOoerrst'or sSeptember 5,1996U.S.NuclearRegulatory Commission DocumentControlDeskAttn:GuyS.VissingProjectDirectorate I-1Washington, D.C.20555


==Subject:==
==Subject:==
LER96-011,ImproperConfigurationofCircuitBreaker,DuetoUndetectedInternalInterference,ResultsinAutomaticStartofBothAuxiliaryFeedwaterPumpsR.E.GinnaNuclearPowerPlantDocketNo.50-244
LER96-011,ImproperConfiguration ofCircuitBreaker,DuetoUndetected InternalInterference, ResultsinAutomatic StartofBothAuxiliary Feedwater PumpsR.E.GinnaNuclearPowerPlantDocketNo.50-244


==DearMr.Vissing:==
==DearMr.Vissing:==
Inaccordancewith10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv),whichrequiresareportof,"Anyeventorconditionthatresultedinamanualorautomaticactuationofanyengineeredsafetyfeature(ESF),includingthereactorprotectionsystem(RPS)",theattachedLicenseeEventReportLER96-011isherebysubmitted.Th!seventhasinnowayaffectedthepublic'shealthandsafety.Verytrulyyours,RobertC.Mecredyxc:Mr.GuyS.Vissing(MailStop14C7)PWRProjectDirectorateI-1Washington,D.C.20555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspectorc7609i30028960905PDRaOOCK0500044SPDR NRCFORM366(4-95)U.S.NUCLEARREGULATORYCOMMISSIOLICENSEEEVENTREPORT(LER)(Seereverseforrequirednumberofdigits/charactersfcreachblock)APPROVEDBYOMBNO.3160%104EXPIRES04/30/98ESTIMATEDBURDENPERRESPONSEToCOMPLYWITHTHISMANDATORYINFORMATIONCOLLECTIONREQUEST:50.0HRS.REPORTEDLESSONSLEARNEDAREINCORPORATEDINTOTHELICENSINGPROCESSANDFEDBACKToINDUSTRY.FORWARDCOMMENTSREGARDINGBURDENESTIMATEToTHEINFORMATIONANDRECORDSMANAGEMENTBRANCH(T-6F33),U.S.NUCI.EARREGULATORYCOMMISSION,WASHINGTON,DC20555cool,ANDTOTHEPAPERWORKREDUCTIONPROJECTFACIUTYNAMEIIIR.E.GinnaNuclearPowerPlantDOCKETNUMBERI2)05000244PAOEI3)1OF5TITLE(4IImproperConfigurationofCircuitBreaker,DuetoUndetectedInternalInterference,ResultsinAutomaticStartofBothAuxiliaryFeedwaterPumpsEVENTDATE(6)LERNUMBER(6)REPORTDATE(7)OTHERFACILITIESINVOLVED(8)MONTH08DAY07YEAR96SEQUENTIALREVISIONNUMBERNUMBER96-011-00MONTHOAY090596FACIUTYNAMEFACIUTYNAMEDOCKETNUMBERDOCKETNUMBEROPERATINGMODE(9)POWERLEVEL(10)00020.2201(b)20.2203(a)(1)20.2203(a)(2)(i)20.2203(a)(2)(ii)20.2203(a)(2)(iii)20.2203(a)(2)(iv)20.2203(a)(2)(v)20.2203(a)(3)(i)20.2203(a)(3)(ii)20.2203(a)(4)50.36(c)(1)50.36(c)(2)50.73(a)(2)(i)50.73(a)(2)(ii)50.73(a)(2)(iii)X50.73(a)(2)(iv)50.73(a)(2)(v)50.73(a)(2)(vii)THISREPORTISSUBMITTEDPURSUANTTOTHEREQUIREMENTSOF10CFR%:(Checkoneormore)(11)50.73(a)(2)(viii)50.73(a)(2)(x)73.71OTHERSpecifyinAbstractbelowormNRCForm366ANAMELICENSEECONTACTFORTHISLER(12)ELEFHONENUMBERilncrvdeAreaCodelJohnT.St.Martin-TechnicalAssistantCOMPLETEONELINEFOREACHCOMPONENTFAILUREDESC(716)771-3641RIBEDINTHISREPORT(13)CAUSESYSTEMCOMPONENTMANUFACTURERToNPRDSCAUSESYSTEMCOMPONENTMANUFACTURERREPORTABLEToNPROSSUPPLEMENTALREPORTEXPECTED(14)YES(Ifyes,completeEXPECTEDSUBMISSIONDATE).XNOEXPECTEDSUBMISSIONDATE(16)MONTHDAYYEARABSTRACT(Limitto1400spaces,i.e.,approximately15single-spacedtypewrittenlines)(16)OnAugust7,1996,atapproximately2009EDST,theplantwasinIVlode3withthereactorcoolantsystembeingmaintainedatatemperatureof545degreesFandapressurizerpressureof2235PSIG.Withnoauxiliaryfeedwaterpumpsrunningandonemainfeedwaterpumpcircuitbreakerrackedoutinthe"test"position,'n"AFWBypassSwitch"wasmovedfrom"Defeat"to"Normal".Anundetectedimproperconfigurationofthecircuitbreakercreatedthelogicthatbothmainfeedwaterpumpbreakerswerealreadyopen.Thiscreatedthelogicforautostartofboththe"A"and"B"motor-drivenauxiliaryfeedwaterpumps.Immediateactionwastostabilizeauxiliaryfeedwaterflowtobothsteamgenerators.Theunderlyingcauseoftheautostartwasthatthelogicforautostartdivaspresentduetoanundetectedinternalinterferencewithinthecircuitbreakerbetweentherackingarmandtheactuatingrodforthe52Sauxiliaryswitch,whichpreventedthisswitchfromopeningtoprovidethecircuitlogicthatthebreakerwasintheclosedposition.ThiseventisNUREG-1022CauseCode(A).CorrectiveactiontopreventrecurrenceisoutlinedinSectionV.B.NRCFORM366(4-95)
Inaccordance with10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv),whichrequiresareportof,"Anyeventorcondition thatresultedinamanualorautomatic actuation ofanyengineered safetyfeature(ESF),including thereactorprotection system(RPS)",theattachedLicenseeEventReportLER96-011isherebysubmitted.
NRCFORM366A(4-95)LICENSEEEVENTREPORT(LER)TEXTCONTINUATIONU.S.NUCLEARREGULATORYCOMMISSIONFACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIALREVISIONNUMBERNUMBER96-011-00PAGE(3)2OF5TEXTiifmorespeceisrequired,useedditionefcopiesofNRCForm366Aj(17)PRE-EVENTPLANTCONDITIONS:OnAugust7,1996,atapproximately2009EDST,theplantwasinMode3asaresultofavoluntaryplantshutdowntoupgrademotor-operatedvalvesintheresidualheatremovalIRHR)system.Valveupgradeswerecompletedandplantheatupandstartupwasinprogress.ThereactorcoolantsystemIRCS)wasbeingmaintainedatatemperatureofapproximately545degreesFandapressurizer(PRZR)pressureofapproximately2235PSIG.Thecircuitbreakerforthe"A"mainfeedwaterIMFW)pumphadjumpersinstalledandwasclosedinthe"test"position,tocomplywithtemporaryadministrativerequirements.AuxiliaryfeedwaterIAFW)pumpshadjustbeensecuredasdirectedbythesetemporaryadministrativerequirements,sotherewerenoAFWpumpsrunning.II.DESCRIPTIONOFEVENT:A.DATESANDAPPROXIMATETIMESOFMAJOROCCURRENCES:oAugust7,1996,2009EDST:Eventdateandtime.oAugust7,1996,2009EDST:Discoverydateandtime.oAugust7,1996,2024EDST:OnerunningAFWpumpissecured.oAugust7,1996,2135EDST:AllrunningAFWpumpsaresecured.EVENT:OnAugust7,1996,atapproximately2009EDST,theplantwasinMode3.TheRCSwasbeingmaintainedatatemperatureofapproximately545degreesFandaPRZRpressureofapproximately2235PSIG.AsdirectedbyNormalOperatingProcedure0-1.2,"PlantStartupFromHotShutdowntoFullLoad",theControlRoomoperatorsmovedan"AFWBypassSwitch"fromthe"Defeat"tothe"Normal"position.Duetoanundetectedimproperconfigurationofthecircuitbreakerforthe"A"MFWpump,the2of2logicforbothMFWpumpbreakersopenwaspresent,whichcausedanautostartofboththe"A"and"B"AFWpumps.TheControlRoomoperatorsobservedtheautostartofboththe"A"and"B"AFWpumps,andcontrolledAFWflowtothedesiredflowrateforMode3conditions.OneoftherunningAFWpumpswassecuredatapproximately2024EDST.TheControlRoomoperatorsrequestedthatplantelectriciansinvestigatetheproblem.Electriciansdetermined,whenrackingoutthecircuitbreakerintothe"test"position,thebreakerpositioningarmhadtravelledbeyonditsmechanicalstop.Thiscausedanundetectedinterferencebetweentherackingarmandthe52Sauxiliaryswitchactuatingrod,whichpreventedthe52Sswitchfromopeningtoprovidecircuitlogicthatthebreakerwasintheclosedposition.Thebreakerwasproperlyrackedout,andelectriciansverifiedtherewasnointerferenceandthatthe52Sswitchhadopened.NIICFOAM366A(4-95) tl NRCFORM366A(4-95)LICENSEEEXTENTREPORT(LER)TEXTCONTINUATIONU.S.NUCLEARREGULATORYCOMMISSIONFACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIALREVISIONNUMBERNUMBER96-011-00PAGE(3)3OF5TEXT(Ifmorespeceisrequired,useeddidonelcopiesofNRCForm366AJ(17)C.INOPERABLESTRUCTURES,COMPONENTS,ORSYSTEMSTHATCONTRIBUTEDTOTHEEVENT:NoneD.OTHERSYSTEMSORSECONDARYFUNCTIONSAFFECTED:NoneE.METHODOFDISCOVERY:Thiseventwasimmediatelyapparentwhenboththe"A"and"B"AFWpumpsautostartedaftertheAFWBypassSwitchwasplacedinthe"Normal".position.OPERATORACTION:Afterboththe"A"and"B"AFWpumpsautostarted,theControlRoomoperatorstookpromptactionstocontrolAFWflow.Theyrequestedthattheplantelectriciansdeterminethecauseoftheproblem.TheControlRoomoperatorssubsequentlynotifiedhighersupervisionandnotifiedtheNRCper10CFR50.72(b)(2)(ii),non-emergencyfourhournotification,atapproximately2226EDSTonAugust7,1996.G.SAFETYSYSTEMRESPONSES:Boththe"A"and"B"AFWpumpsautostartedasperdesign.CAUSEOFEVENT:A.IMMEDIATECAUSE:Theimmediatecauseoftheautostartofboththe"A"and"B"AFWpumpswastheautostartlogic,whichwassatisfiedby52ScontactsprovidingcircuitlogicthatbothMFWpumpbreakerswereopenandanAFWBypassSwitchin"Normal".B.INTERMEDIATECAUSE:Theintermediatecauseofautostartlogicbeingsatisfiedwasanundetectedimproperconfigurationofthe"A"'MFWpumpcircuitbreaker.NRCFORM36:6I's)
Th!seventhasinnowayaffectedthepublic'shealthandsafety.Verytrulyyours,RobertC.Mecredyxc:Mr.GuyS.Vissing(MailStop14C7)PWRProjectDirectorate I-1Washington, D.C.20555U.S.NuclearRegulatory Commission RegionI475Allendale RoadKingofPrussia,PA19406GinnaSeniorResidentInspector c7609i30028 960905PDRaOOCK0500044SPDR NRCFORM366(4-95)U.S.NUCLEARREGULATORY COMMISSIO LICENSEEEVENTREPORT(LER)(Seereverseforrequirednumberofdigits/characters fcreachblock)APPROVEDBYOMBNO.3160%104EXPIRES04/30/98ESTIMATED BURDENPERRESPONSEToCOMPLYWITHTHISMANDATORY INFORMATION COLLECTION REQUEST:50.0HRS.REPORTEDLESSONSLEARNEDAREINCORPORATED INTOTHELICENSING PROCESSANDFEDBACKToINDUSTRY.
NRCFORM366A(4-95)LICENSEEEVENTREPORT(LER)TEXTCONTINUATIONU.S.NUCLEARREGULATORYCOMMISSIONFACILITYNAME(1)DOCKETLERNUMBER(6)PAGE(3)R.E.GinnaNuclearPowerPlant05000244YEARSEQUENTIALREVISIONNUMBERNUMBER4OF596-011-00TEXTIifmorespaceisrequired,useadditionalcopiesofNRCForm36@A/(17)C.ROOTCAUSE:Theunderlyingcauseoftheimproperconfigurationwasanundetectedinternalinterferencewithinthe"A"MFWpumpcircuitbreaker.Whenthebreakerwasrackedouttothetestposition,thebreakerpositioningarmtravelledbeyonditsmechanicalstop.Thiscausedinterferencebetweentherackingarmandtheactuatingrodforthe52Sauxiliarycontactswitch.Therefore,whilethebreakerwasphysicallyclosedinthe"test"position,theauxiliaryswitchdidnotprovidecircuitlogicthatthebreakerwasintheclosedposition.ThissituationwascreatedtobeincompliancewiththeGinnaStationImprovedTechnicalSpecifications(ITS)Table3.3.2-1Function6.f.TopreventanunnecessaryactuationofbothAFWpumpsduringMode2conditions,aMFWpumpbreakermaybeadministrativelyclosedinthetestposition,provideditiscapableofbeingtrippedonundervoltageandovercurrentconditions.TheadministrativerequirementswereestablishedtocomplywithITSTable3.3.2-1,whichrequirestheautostartfunctionofthemotor-drivenAFWpumpuponopeningofbothMFWpumpbreakersduringModes1and2.PriortoAmendmentNo.61totheITS,thisfunctionwasonlyrequiredinMode1whentheMFWpumpswereactuallyinservice.TheadditionofMode2(whentheMFWpumpsmaynotbeinservice)wasinadvertentlyaddedtotheITSbyAmendmentNo.61.ThiseventisNUREG-1022CauseCode(A),"PersonnelError".Thiserrorwasacognitiveerroronthepartofaplantelectrician,whodidnotdetecttheinterferencebetweentherackingarmandtheactuatingrod.Thiserrorwasassociatedwithactivitiesthatwerecoveredbyanapprovedprocedure,andwasnotcontrarytothatprocedure.Theproceduralguidancewascorrect,butenhancementstotheprocedurehavebeenidentified.Therewerenounusualcharacteristicsofthelocationofthisbreakerthatcontributedtothisevent.Notethatthisinterferencecanonlybecreatedwhenrackingthebreakerouttothetestposition.TheautostartoftheAFWpumpdoesnotmeettheNUMARC93-01,"IndustryGuidelineforMonitoringtheEffectivenessofMaintenanceatNuclearPowerPlants",definitionofa"MaintenancePreventableFunctionalFailure".IV.ANALYSISOFEVENT:Thiseventisreportableinaccordancewith10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv),whichrequiresareportof,"Anyeventorconditionthatresultedinamanualorautomaticactuationofanyengineeredsafetyfeature(ESF),includingthereactorprotectionsystem(RPS)".ThestartofanAFWpumpisanactuationnfanESF.Anassessmentwasperformedconsideringboththesafetyconsequencesandimplicationsofthiseventwiththefollowingresultsandconclusions:Therewerenooperationalorsafetyconsequencesorimplicationsattributedtotheautostartofboththe"A"and"B"AFWpumpsbecause:oTheautostartoccurredwithacceptablelevelsinbothS/Gs.AFWflowwascontrolledtomaintaintheselevels.NRCFOR)A366A(4.95)
FORWARDCOMMENTSREGARDING BURDENESTIMATEToTHEINFORMATION ANDRECORDSMANAGEMENT BRANCH(T-6F33),U.S.NUCI.EARREGULATORY COMMISSION, WASHINGTON, DC20555cool,ANDTOTHEPAPERWORK REDUCTION PROJECTFACIUTYNAMEIIIR.E.GinnaNuclearPowerPlantDOCKETNUMBERI2)05000244PAOEI3)1OF5TITLE(4IImproperConfiguration ofCircuitBreaker,DuetoUndetected InternalInterference, ResultsinAutomatic StartofBothAuxiliary Feedwater PumpsEVENTDATE(6)LERNUMBER(6)REPORTDATE(7)OTHERFACILITIES INVOLVED(8)MONTH08DAY07YEAR96SEQUENTIAL REVISIONNUMBERNUMBER96-011-00MONTHOAY090596FACIUTYNAMEFACIUTYNAMEDOCKETNUMBERDOCKETNUMBEROPERATING MODE(9)POWERLEVEL(10)00020.2201(b) 20.2203(a)
NRCFORM366A(4-96)LICENSEEEVENTREPORT(LER)TEXTCONTINUATIONU.S.NUCLEARREGULATORYCOMMISSIONFACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIALREVISIONNUMBERNUMBER96-011-00PAGE(3)5OF5TEXTllfmorespaceisrequired,useadditionalcopiesofNRCForm366A/(17)oThelimitingcaseforthesupplyofAFWistheLossofFeedwateraccidentat100'/opower.Theplantconditionatthetimeofthiseventwaslessthan5%power.Basedontheabove,itcanbeconcludedthatthepublic'shealthandsafetywasassuredatalltimes.V.CORRECTIVEACTION:A.ACTIONTAKENTORETURNAFFECTEDSYSTEMSTOPRE-EVENTNORMALSTATUS:AFWflowwascontrolledasdesiredtomaintainS/Glevel.oTherunningAFWpumpsweresecured.B.ACTIONTAKENORPLANNEDTOPREVENTRECURRENCE:TheITSwillberevisedtoeliminatetheneedforhavingaMFWpumpbreakerclosedinthetestpositionduringMode2conditions.Procedure0-2.1willbeenhancedtoincludespecificallyaddressingthatthe52Sswitchactuatingrodisinthecorrectpositionwhenthebreakerisrackedoutinthetestposition.Vi.ADDITIONALINFORMATION:A.FAILEDCOMPONENTS:NoneB.PREVIOUSLERsONSIMILAREVENTS:AsimilarLEReventhistoricalsearchwasconductedwiththefollowingresults:NodocumentationofsimilarLEReventswiththesamerootcausecouldbeidentified.However,LERs96-004,96-008,and96-010aresimilareventswithdifferentrootcauses.C.SPECIALCOMfvlENTS:NoneNRCFORM9"~A(4-95)}}
(1)20.2203(a)(2)(i) 20.2203(a)(2)(ii) 20.2203(a)(2)
(iii)20.2203(a)
(2)(iv)20.2203(a)
(2)(v)20.2203(a)
(3)(i)20.2203(a)(3)
(ii)20.2203(a)
(4)50.36(c)(1) 50.36(c)(2) 50.73(a)(2)(i)50.73(a)(2)
(ii)50.73(a)(2)(iii)X50.73(a)(2)(iv) 50.73(a)(2)(v) 50.73(a)(2)(vii)
THISREPORTISSUBMITTED PURSUANTTOTHEREQUIREMENTS OF10CFR%:(Checkoneormore)(11)50.73(a)(2)(viii) 50.73(a)(2)
(x)73.71OTHERSpecifyinAbstractbelowormNRCForm366ANAMELICENSEECONTACTFORTHISLER(12)ELEFHONENUMBERilncrvdeAreaCodelJohnT.St.Martin-Technical Assistant COMPLETEONELINEFOREACHCOMPONENT FAILUREDESC(716)771-3641RIBEDINTHISREPORT(13)CAUSESYSTEMCOMPONENT MANUFACTURER ToNPRDSCAUSESYSTEMCOMPONENT MANUFACTURER REPORTABLE ToNPROSSUPPLEMENTAL REPORTEXPECTED(14)YES(Ifyes,completeEXPECTEDSUBMISSION DATE).XNOEXPECTEDSUBMISSION DATE(16)MONTHDAYYEARABSTRACT(Limitto1400spaces,i.e.,approximately 15single-spaced typewritten lines)(16)OnAugust7,1996,atapproximately 2009EDST,theplantwasinIVlode3withthereactorcoolantsystembeingmaintained atatemperature of545degreesFandapressurizer pressureof2235PSIG.Withnoauxiliary feedwater pumpsrunningandonemainfeedwater pumpcircuitbreakerrackedoutinthe"test"position,'n "AFWBypassSwitch"wasmovedfrom"Defeat"to"Normal".
Anundetected improperconfiguration ofthecircuitbreakercreatedthelogicthatbothmainfeedwater pumpbreakerswerealreadyopen.Thiscreatedthelogicforautostart ofboththe"A"and"B"motor-driven auxiliary feedwater pumps.Immediate actionwastostabilize auxiliary feedwater flowtobothsteamgenerators.
Theunderlying causeoftheautostart wasthatthelogicforautostart divaspresentduetoanundetected internalinterference withinthecircuitbreakerbetweentherackingarmandtheactuating rodforthe52Sauxiliary switch,whichprevented thisswitchfromopeningtoprovidethecircuitlogicthatthebreakerwasintheclosedposition.
ThiseventisNUREG-1022 CauseCode(A).Corrective actiontopreventrecurrence isoutlinedinSectionV.B.NRCFORM366(4-95)
NRCFORM366A(4-95)LICENSEEEVENTREPORT(LER)TEXTCONTINUATION U.S.NUCLEARREGULATORY COMMISSION FACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIAL REVISIONNUMBERNUMBER96-011-00PAGE(3)2OF5TEXTiifmorespeceisrequired, useedditionef copiesofNRCForm366Aj(17)PRE-EVENT PLANTCONDITIONS:
OnAugust7,1996,atapproximately 2009EDST,theplantwasinMode3asaresultofavoluntary plantshutdowntoupgrademotor-operated valvesintheresidualheatremovalIRHR)system.Valveupgradeswerecompleted andplantheatupandstartupwasinprogress.
ThereactorcoolantsystemIRCS)wasbeingmaintained atatemperature ofapproximately 545degreesFandapressurizer (PRZR)pressureofapproximately 2235PSIG.Thecircuitbreakerforthe"A"mainfeedwater IMFW)pumphadjumpersinstalled andwasclosedinthe"test"position, tocomplywithtemporary administrative requirements.
Auxiliary feedwater IAFW)pumpshadjustbeensecuredasdirectedbythesetemporary administrative requirements, sotherewerenoAFWpumpsrunning.II.DESCRIPTION OFEVENT:A.DATESANDAPPROXIMATE TIMESOFMAJOROCCURRENCES:
oAugust7,1996,2009EDST:Eventdateandtime.oAugust7,1996,2009EDST:Discovery dateandtime.oAugust7,1996,2024EDST:OnerunningAFWpumpissecured.oAugust7,1996,2135EDST:AllrunningAFWpumpsaresecured.EVENT:OnAugust7,1996,atapproximately 2009EDST,theplantwasinMode3.TheRCSwasbeingmaintained atatemperature ofapproximately 545degreesFandaPRZRpressureofapproximately 2235PSIG.AsdirectedbyNormalOperating Procedure 0-1.2,"PlantStartupFromHotShutdowntoFullLoad",theControlRoomoperators movedan"AFWBypassSwitch"fromthe"Defeat"tothe"Normal"position.
Duetoanundetected improperconfiguration ofthecircuitbreakerforthe"A"MFWpump,the2of2logicforbothMFWpumpbreakersopenwaspresent,whichcausedanautostart ofboththe"A"and"B"AFWpumps.TheControlRoomoperators observedtheautostart ofboththe"A"and"B"AFWpumps,andcontrolled AFWflowtothedesiredflowrateforMode3conditions.
OneoftherunningAFWpumpswassecuredatapproximately 2024EDST.TheControlRoomoperators requested thatplantelectricians investigate theproblem.Electricians determined, whenrackingoutthecircuitbreakerintothe"test"position, thebreakerpositioning armhadtravelled beyonditsmechanical stop.Thiscausedanundetected interference betweentherackingarmandthe52Sauxiliary switchactuating rod,whichprevented the52Sswitchfromopeningtoprovidecircuitlogicthatthebreakerwasintheclosedposition.
Thebreakerwasproperlyrackedout,andelectricians verifiedtherewasnointerference andthatthe52Sswitchhadopened.NIICFOAM366A(4-95) tl NRCFORM366A(4-95)LICENSEEEXTENTREPORT(LER)TEXTCONTINUATION U.S.NUCLEARREGULATORY COMMISSION FACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIAL REVISIONNUMBERNUMBER96-011-00PAGE(3)3OF5TEXT(Ifmorespeceisrequired, useeddidonelcopiesofNRCForm366AJ(17)C.INOPERABLE STRUCTURES, COMPONENTS, ORSYSTEMSTHATCONTRIBUTED TOTHEEVENT:NoneD.OTHERSYSTEMSORSECONDARY FUNCTIONS AFFECTED:
NoneE.METHODOFDISCOVERY:
Thiseventwasimmediately apparentwhenboththe"A"and"B"AFWpumpsautostarted aftertheAFWBypassSwitchwasplacedinthe"Normal".
position.
OPERATORACTION:Afterboththe"A"and"B"AFWpumpsautostarted, theControlRoomoperators tookpromptactionstocontrolAFWflow.Theyrequested thattheplantelectricians determine thecauseoftheproblem.TheControlRoomoperators subsequently notifiedhighersupervision andnotifiedtheNRCper10CFR50.72 (b)(2)(ii),non-emergency fourhournotification, atapproximately 2226EDSTonAugust7,1996.G.SAFETYSYSTEMRESPONSES:
Boththe"A"and"B"AFWpumpsautostarted asperdesign.CAUSEOFEVENT:A.IMMEDIATE CAUSE:Theimmediate causeoftheautostart ofboththe"A"and"B"AFWpumpswastheautostart logic,whichwassatisfied by52Scontactsproviding circuitlogicthatbothMFWpumpbreakerswereopenandanAFWBypassSwitchin"Normal".
B.INTERMEDIATE CAUSE:Theintermediate causeofautostart logicbeingsatisfied wasanundetected improperconfiguration ofthe"A"'MFWpumpcircuitbreaker.NRCFORM36:6I's)
NRCFORM366A(4-95)LICENSEEEVENTREPORT(LER)TEXTCONTINUATION U.S.NUCLEARREGULATORY COMMISSION FACILITYNAME(1)DOCKETLERNUMBER(6)PAGE(3)R.E.GinnaNuclearPowerPlant05000244YEARSEQUENTIAL REVISIONNUMBERNUMBER4OF596-011-00TEXTIifmorespaceisrequired, useadditional copiesofNRCForm36@A/(17)C.ROOTCAUSE:Theunderlying causeoftheimproperconfiguration wasanundetected internalinterference withinthe"A"MFWpumpcircuitbreaker.Whenthebreakerwasrackedouttothetestposition, thebreakerpositioning armtravelled beyonditsmechanical stop.Thiscausedinterference betweentherackingarmandtheactuating rodforthe52Sauxiliary contactswitch.Therefore, whilethebreakerwasphysically closedinthe"test"position, theauxiliary switchdidnotprovidecircuitlogicthatthebreakerwasintheclosedposition.
Thissituation wascreatedtobeincompliance withtheGinnaStationImprovedTechnical Specifications (ITS)Table3.3.2-1Function6.f.Topreventanunnecessary actuation ofbothAFWpumpsduringMode2conditions, aMFWpumpbreakermaybeadministratively closedinthetestposition, provideditiscapableofbeingtrippedonundervoltage andovercurrent conditions.
Theadministrative requirements wereestablished tocomplywithITSTable3.3.2-1,whichrequirestheautostart functionofthemotor-driven AFWpumpuponopeningofbothMFWpumpbreakersduringModes1and2.PriortoAmendment No.61totheITS,thisfunctionwasonlyrequiredinMode1whentheMFWpumpswereactuallyinservice.TheadditionofMode2(whentheMFWpumpsmaynotbeinservice)wasinadvertently addedtotheITSbyAmendment No.61.ThiseventisNUREG-1022 CauseCode(A),"Personnel Error".Thiserrorwasacognitive erroronthepartofaplantelectrician, whodidnotdetecttheinterference betweentherackingarmandtheactuating rod.Thiserrorwasassociated withactivities thatwerecoveredbyanapprovedprocedure, andwasnotcontrarytothatprocedure.
Theprocedural guidancewascorrect,butenhancements totheprocedure havebeenidentified.
Therewerenounusualcharacteristics ofthelocationofthisbreakerthatcontributed tothisevent.Notethatthisinterference canonlybecreatedwhenrackingthebreakerouttothetestposition.
Theautostart oftheAFWpumpdoesnotmeettheNUMARC93-01,"Industry Guideline forMonitoring theEffectiveness ofMaintenance atNuclearPowerPlants",definition ofa"Maintenance Preventable Functional Failure".
IV.ANALYSISOFEVENT:Thiseventisreportable inaccordance with10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv),whichrequiresareportof,"Anyeventorcondition thatresultedinamanualorautomatic actuation ofanyengineered safetyfeature(ESF),including thereactorprotection system(RPS)".ThestartofanAFWpumpisanactuation nfanESF.Anassessment wasperformed considering boththesafetyconsequences andimplications ofthiseventwiththefollowing resultsandconclusions:
Therewerenooperational orsafetyconsequences orimplications attributed totheautostart ofboththe"A"and"B"AFWpumpsbecause:oTheautostart occurredwithacceptable levelsinbothS/Gs.AFWflowwascontrolled tomaintaintheselevels.NRCFOR)A366A(4.95)
NRCFORM366A(4-96)LICENSEEEVENTREPORT(LER)TEXTCONTINUATION U.S.NUCLEARREGULATORY COMMISSION FACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIAL REVISIONNUMBERNUMBER96-011-00PAGE(3)5OF5TEXTllfmorespaceisrequired, useadditional copiesofNRCForm366A/(17)oThelimitingcaseforthesupplyofAFWistheLossofFeedwater accidentat100'/opower.Theplantcondition atthetimeofthiseventwaslessthan5%power.Basedontheabove,itcanbeconcluded thatthepublic'shealthandsafetywasassuredatalltimes.V.CORRECTIVE ACTION:A.ACTIONTAKENTORETURNAFFECTEDSYSTEMSTOPRE-EVENT NORMALSTATUS:AFWflowwascontrolled asdesiredtomaintainS/Glevel.oTherunningAFWpumpsweresecured.B.ACTIONTAKENORPLANNEDTOPREVENTRECURRENCE:
TheITSwillberevisedtoeliminate theneedforhavingaMFWpumpbreakerclosedinthetestpositionduringMode2conditions.
Procedure 0-2.1willbeenhancedtoincludespecifically addressing thatthe52Sswitchactuating rodisinthecorrectpositionwhenthebreakerisrackedoutinthetestposition.
Vi.ADDITIONAL INFORMATION:
A.FAILEDCOMPONENTS:
NoneB.PREVIOUSLERsONSIMILAREVENTS:AsimilarLEReventhistorical searchwasconducted withthefollowing results:Nodocumentation ofsimilarLEReventswiththesamerootcausecouldbeidentified.
However,LERs96-004,96-008,and96-010aresimilareventswithdifferent rootcauses.C.SPECIALCOMfvlENTS:
NoneNRCFORM9"~A(4-95)}}

Revision as of 12:46, 29 June 2018

LER 96-011-00:on 960807,improper Configuration of Circuit Breaker Occurred,Due to Undetected Internal Interference, Resulting in Automatic Start of Both Auxiliary Feedwater Pumps.Running AFW Pumps Were secured.W/960905 Ltr
ML17264A591
Person / Time
Site: Ginna Constellation icon.png
Issue date: 09/05/1996
From: MARTIN J T, MERCREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To: VISSING G S
NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-96-011, LER-96-11, NUDOCS 9609130028
Download: ML17264A591 (8)
v • d • e


Text

('A'19'(90RYjREGULARYINFORMATION DISTRIBUTI SYSTEM(RIDS)1ACCESSION NBR:9609130028 DOC.DATE:

96/09/05NOTARIZED:

NODOCKETFACIL:50-244 RobertEmmetGinnaNuclearPlant,Unit1,Rochester G05000244AUTH.NAMEAUTHORAFFILIATION MARTIN,J.T.

Rochester Gas&ElectricCorp.MERCREDY,R.C.

Rochester GasaElectricCorp.RECIP.NAME RECIPIENT AFFILIATION VISSINGiG.S.

SUBJECT:

LER96-011-00:on 960807,improper configuration ofcircuitbreakeroccurred.Due toundetected internalinterference, resulting inautomatic startofbothauxiliary feedwater pumps.RunningAFWpumpsweresecured.W/960905 ltr.DISTRIBUTION CODE:IE22TCOPIESRECEIVED:LTR

/ENCL(SIZE:TITLE:50.73/50.9 LicenseeEventReport(LER),incidentRpt,etc.NOTES:License Expdateinaccordance with10CFR2,2.109(9/19/72).

05000244ERECIPIENT IDCODE/NAME PD1-1PDINTERNAL:

E./Mig/EQB FILECENA~/5E/EELBNRR/DRCH/HHFB NRR/DRCH/HOLB NRR/DRPM/PECB NRR/DSSA/SRXB RGN1FILE01COPIESLTTRENCL112211111111111111RECIPIENT IDCODE/NAME VISSING,G.

AEOD/SPD/RRAB NRR/DE/ECGB NRR/DE/EMEB NRR/DRCH/HICB NRR/DRCH/HQMB NRR/DSSA/SPLB RES/DSIR/EIB COPIESLTTRENCL1111111111111111D0EXTERNAL:

LSTLOBBYWARDNOACMURPHY,G.A NRCPDR111111LITCOBRYCE,JH.'vACPOORE,W.NUDOCSFULLTXT221111NNOTETOALL"RIDS"RECIPIENTS:

PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMOWFNSD-5(EXT~415-2083)

TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEEDlFULLTEXTCONVERSION REQUIREDTOTALNUMBEROFCOP,;-~SREQUIRED:

LTTR25ENCL25 4NDROCHESTERGASANDELECTRICCORPORATION

~89EASTAVfNUE,ROCHESTER,N.Y Id6d9000I 7AREACODE7165d62700 ROScRTC.MECREDYVcePresident NvctearOoerrst'or sSeptember 5,1996U.S.NuclearRegulatory Commission DocumentControlDeskAttn:GuyS.VissingProjectDirectorate I-1Washington, D.C.20555

Subject:

LER96-011,ImproperConfiguration ofCircuitBreaker,DuetoUndetected InternalInterference, ResultsinAutomatic StartofBothAuxiliary Feedwater PumpsR.E.GinnaNuclearPowerPlantDocketNo.50-244

DearMr.Vissing:

Inaccordance with10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv),whichrequiresareportof,"Anyeventorcondition thatresultedinamanualorautomatic actuation ofanyengineered safetyfeature(ESF),including thereactorprotection system(RPS)",theattachedLicenseeEventReportLER96-011isherebysubmitted.

Th!seventhasinnowayaffectedthepublic'shealthandsafety.Verytrulyyours,RobertC.Mecredyxc:Mr.GuyS.Vissing(MailStop14C7)PWRProjectDirectorate I-1Washington, D.C.20555U.S.NuclearRegulatory Commission RegionI475Allendale RoadKingofPrussia,PA19406GinnaSeniorResidentInspector c7609i30028 960905PDRaOOCK0500044SPDR NRCFORM366(4-95)U.S.NUCLEARREGULATORY COMMISSIO LICENSEEEVENTREPORT(LER)(Seereverseforrequirednumberofdigits/characters fcreachblock)APPROVEDBYOMBNO.3160%104EXPIRES04/30/98ESTIMATED BURDENPERRESPONSEToCOMPLYWITHTHISMANDATORY INFORMATION COLLECTION REQUEST:50.0HRS.REPORTEDLESSONSLEARNEDAREINCORPORATED INTOTHELICENSING PROCESSANDFEDBACKToINDUSTRY.

FORWARDCOMMENTSREGARDING BURDENESTIMATEToTHEINFORMATION ANDRECORDSMANAGEMENT BRANCH(T-6F33),U.S.NUCI.EARREGULATORY COMMISSION, WASHINGTON, DC20555cool,ANDTOTHEPAPERWORK REDUCTION PROJECTFACIUTYNAMEIIIR.E.GinnaNuclearPowerPlantDOCKETNUMBERI2)05000244PAOEI3)1OF5TITLE(4IImproperConfiguration ofCircuitBreaker,DuetoUndetected InternalInterference, ResultsinAutomatic StartofBothAuxiliary Feedwater PumpsEVENTDATE(6)LERNUMBER(6)REPORTDATE(7)OTHERFACILITIES INVOLVED(8)MONTH08DAY07YEAR96SEQUENTIAL REVISIONNUMBERNUMBER96-011-00MONTHOAY090596FACIUTYNAMEFACIUTYNAMEDOCKETNUMBERDOCKETNUMBEROPERATING MODE(9)POWERLEVEL(10)00020.2201(b) 20.2203(a)

(1)20.2203(a)(2)(i) 20.2203(a)(2)(ii) 20.2203(a)(2)

(iii)20.2203(a)

(2)(iv)20.2203(a)

(2)(v)20.2203(a)

(3)(i)20.2203(a)(3)

(ii)20.2203(a)

(4)50.36(c)(1) 50.36(c)(2) 50.73(a)(2)(i)50.73(a)(2)

(ii)50.73(a)(2)(iii)X50.73(a)(2)(iv) 50.73(a)(2)(v) 50.73(a)(2)(vii)

THISREPORTISSUBMITTED PURSUANTTOTHEREQUIREMENTS OF10CFR%:(Checkoneormore)(11)50.73(a)(2)(viii) 50.73(a)(2)

(x)73.71OTHERSpecifyinAbstractbelowormNRCForm366ANAMELICENSEECONTACTFORTHISLER(12)ELEFHONENUMBERilncrvdeAreaCodelJohnT.St.Martin-Technical Assistant COMPLETEONELINEFOREACHCOMPONENT FAILUREDESC(716)771-3641RIBEDINTHISREPORT(13)CAUSESYSTEMCOMPONENT MANUFACTURER ToNPRDSCAUSESYSTEMCOMPONENT MANUFACTURER REPORTABLE ToNPROSSUPPLEMENTAL REPORTEXPECTED(14)YES(Ifyes,completeEXPECTEDSUBMISSION DATE).XNOEXPECTEDSUBMISSION DATE(16)MONTHDAYYEARABSTRACT(Limitto1400spaces,i.e.,approximately 15single-spaced typewritten lines)(16)OnAugust7,1996,atapproximately 2009EDST,theplantwasinIVlode3withthereactorcoolantsystembeingmaintained atatemperature of545degreesFandapressurizer pressureof2235PSIG.Withnoauxiliary feedwater pumpsrunningandonemainfeedwater pumpcircuitbreakerrackedoutinthe"test"position,'n "AFWBypassSwitch"wasmovedfrom"Defeat"to"Normal".

Anundetected improperconfiguration ofthecircuitbreakercreatedthelogicthatbothmainfeedwater pumpbreakerswerealreadyopen.Thiscreatedthelogicforautostart ofboththe"A"and"B"motor-driven auxiliary feedwater pumps.Immediate actionwastostabilize auxiliary feedwater flowtobothsteamgenerators.

Theunderlying causeoftheautostart wasthatthelogicforautostart divaspresentduetoanundetected internalinterference withinthecircuitbreakerbetweentherackingarmandtheactuating rodforthe52Sauxiliary switch,whichprevented thisswitchfromopeningtoprovidethecircuitlogicthatthebreakerwasintheclosedposition.

ThiseventisNUREG-1022 CauseCode(A).Corrective actiontopreventrecurrence isoutlinedinSectionV.B.NRCFORM366(4-95)

NRCFORM366A(4-95)LICENSEEEVENTREPORT(LER)TEXTCONTINUATION U.S.NUCLEARREGULATORY COMMISSION FACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIAL REVISIONNUMBERNUMBER96-011-00PAGE(3)2OF5TEXTiifmorespeceisrequired, useedditionef copiesofNRCForm366Aj(17)PRE-EVENT PLANTCONDITIONS:

OnAugust7,1996,atapproximately 2009EDST,theplantwasinMode3asaresultofavoluntary plantshutdowntoupgrademotor-operated valvesintheresidualheatremovalIRHR)system.Valveupgradeswerecompleted andplantheatupandstartupwasinprogress.

ThereactorcoolantsystemIRCS)wasbeingmaintained atatemperature ofapproximately 545degreesFandapressurizer (PRZR)pressureofapproximately 2235PSIG.Thecircuitbreakerforthe"A"mainfeedwater IMFW)pumphadjumpersinstalled andwasclosedinthe"test"position, tocomplywithtemporary administrative requirements.

Auxiliary feedwater IAFW)pumpshadjustbeensecuredasdirectedbythesetemporary administrative requirements, sotherewerenoAFWpumpsrunning.II.DESCRIPTION OFEVENT:A.DATESANDAPPROXIMATE TIMESOFMAJOROCCURRENCES:

oAugust7,1996,2009EDST:Eventdateandtime.oAugust7,1996,2009EDST:Discovery dateandtime.oAugust7,1996,2024EDST:OnerunningAFWpumpissecured.oAugust7,1996,2135EDST:AllrunningAFWpumpsaresecured.EVENT:OnAugust7,1996,atapproximately 2009EDST,theplantwasinMode3.TheRCSwasbeingmaintained atatemperature ofapproximately 545degreesFandaPRZRpressureofapproximately 2235PSIG.AsdirectedbyNormalOperating Procedure 0-1.2,"PlantStartupFromHotShutdowntoFullLoad",theControlRoomoperators movedan"AFWBypassSwitch"fromthe"Defeat"tothe"Normal"position.

Duetoanundetected improperconfiguration ofthecircuitbreakerforthe"A"MFWpump,the2of2logicforbothMFWpumpbreakersopenwaspresent,whichcausedanautostart ofboththe"A"and"B"AFWpumps.TheControlRoomoperators observedtheautostart ofboththe"A"and"B"AFWpumps,andcontrolled AFWflowtothedesiredflowrateforMode3conditions.

OneoftherunningAFWpumpswassecuredatapproximately 2024EDST.TheControlRoomoperators requested thatplantelectricians investigate theproblem.Electricians determined, whenrackingoutthecircuitbreakerintothe"test"position, thebreakerpositioning armhadtravelled beyonditsmechanical stop.Thiscausedanundetected interference betweentherackingarmandthe52Sauxiliary switchactuating rod,whichprevented the52Sswitchfromopeningtoprovidecircuitlogicthatthebreakerwasintheclosedposition.

Thebreakerwasproperlyrackedout,andelectricians verifiedtherewasnointerference andthatthe52Sswitchhadopened.NIICFOAM366A(4-95) tl NRCFORM366A(4-95)LICENSEEEXTENTREPORT(LER)TEXTCONTINUATION U.S.NUCLEARREGULATORY COMMISSION FACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIAL REVISIONNUMBERNUMBER96-011-00PAGE(3)3OF5TEXT(Ifmorespeceisrequired, useeddidonelcopiesofNRCForm366AJ(17)C.INOPERABLE STRUCTURES, COMPONENTS, ORSYSTEMSTHATCONTRIBUTED TOTHEEVENT:NoneD.OTHERSYSTEMSORSECONDARY FUNCTIONS AFFECTED:

NoneE.METHODOFDISCOVERY:

Thiseventwasimmediately apparentwhenboththe"A"and"B"AFWpumpsautostarted aftertheAFWBypassSwitchwasplacedinthe"Normal".

position.

OPERATORACTION:Afterboththe"A"and"B"AFWpumpsautostarted, theControlRoomoperators tookpromptactionstocontrolAFWflow.Theyrequested thattheplantelectricians determine thecauseoftheproblem.TheControlRoomoperators subsequently notifiedhighersupervision andnotifiedtheNRCper10CFR50.72 (b)(2)(ii),non-emergency fourhournotification, atapproximately 2226EDSTonAugust7,1996.G.SAFETYSYSTEMRESPONSES:

Boththe"A"and"B"AFWpumpsautostarted asperdesign.CAUSEOFEVENT:A.IMMEDIATE CAUSE:Theimmediate causeoftheautostart ofboththe"A"and"B"AFWpumpswastheautostart logic,whichwassatisfied by52Scontactsproviding circuitlogicthatbothMFWpumpbreakerswereopenandanAFWBypassSwitchin"Normal".

B.INTERMEDIATE CAUSE:Theintermediate causeofautostart logicbeingsatisfied wasanundetected improperconfiguration ofthe"A"'MFWpumpcircuitbreaker.NRCFORM36:6I's)

NRCFORM366A(4-95)LICENSEEEVENTREPORT(LER)TEXTCONTINUATION U.S.NUCLEARREGULATORY COMMISSION FACILITYNAME(1)DOCKETLERNUMBER(6)PAGE(3)R.E.GinnaNuclearPowerPlant05000244YEARSEQUENTIAL REVISIONNUMBERNUMBER4OF596-011-00TEXTIifmorespaceisrequired, useadditional copiesofNRCForm36@A/(17)C.ROOTCAUSE:Theunderlying causeoftheimproperconfiguration wasanundetected internalinterference withinthe"A"MFWpumpcircuitbreaker.Whenthebreakerwasrackedouttothetestposition, thebreakerpositioning armtravelled beyonditsmechanical stop.Thiscausedinterference betweentherackingarmandtheactuating rodforthe52Sauxiliary contactswitch.Therefore, whilethebreakerwasphysically closedinthe"test"position, theauxiliary switchdidnotprovidecircuitlogicthatthebreakerwasintheclosedposition.

Thissituation wascreatedtobeincompliance withtheGinnaStationImprovedTechnical Specifications (ITS)Table3.3.2-1Function6.f.Topreventanunnecessary actuation ofbothAFWpumpsduringMode2conditions, aMFWpumpbreakermaybeadministratively closedinthetestposition, provideditiscapableofbeingtrippedonundervoltage andovercurrent conditions.

Theadministrative requirements wereestablished tocomplywithITSTable3.3.2-1,whichrequirestheautostart functionofthemotor-driven AFWpumpuponopeningofbothMFWpumpbreakersduringModes1and2.PriortoAmendment No.61totheITS,thisfunctionwasonlyrequiredinMode1whentheMFWpumpswereactuallyinservice.TheadditionofMode2(whentheMFWpumpsmaynotbeinservice)wasinadvertently addedtotheITSbyAmendment No.61.ThiseventisNUREG-1022 CauseCode(A),"Personnel Error".Thiserrorwasacognitive erroronthepartofaplantelectrician, whodidnotdetecttheinterference betweentherackingarmandtheactuating rod.Thiserrorwasassociated withactivities thatwerecoveredbyanapprovedprocedure, andwasnotcontrarytothatprocedure.

Theprocedural guidancewascorrect,butenhancements totheprocedure havebeenidentified.

Therewerenounusualcharacteristics ofthelocationofthisbreakerthatcontributed tothisevent.Notethatthisinterference canonlybecreatedwhenrackingthebreakerouttothetestposition.

Theautostart oftheAFWpumpdoesnotmeettheNUMARC93-01,"Industry Guideline forMonitoring theEffectiveness ofMaintenance atNuclearPowerPlants",definition ofa"Maintenance Preventable Functional Failure".

IV.ANALYSISOFEVENT:Thiseventisreportable inaccordance with10CFR50.73,LicenseeEventReportSystem,item(a)(2)(iv),whichrequiresareportof,"Anyeventorcondition thatresultedinamanualorautomatic actuation ofanyengineered safetyfeature(ESF),including thereactorprotection system(RPS)".ThestartofanAFWpumpisanactuation nfanESF.Anassessment wasperformed considering boththesafetyconsequences andimplications ofthiseventwiththefollowing resultsandconclusions:

Therewerenooperational orsafetyconsequences orimplications attributed totheautostart ofboththe"A"and"B"AFWpumpsbecause:oTheautostart occurredwithacceptable levelsinbothS/Gs.AFWflowwascontrolled tomaintaintheselevels.NRCFOR)A366A(4.95)

NRCFORM366A(4-96)LICENSEEEVENTREPORT(LER)TEXTCONTINUATION U.S.NUCLEARREGULATORY COMMISSION FACILITYNAME(1)R.E.GinnaNuclearPowerPlantDOCKET05000244LERNUMBER(6)YEARSEQUENTIAL REVISIONNUMBERNUMBER96-011-00PAGE(3)5OF5TEXTllfmorespaceisrequired, useadditional copiesofNRCForm366A/(17)oThelimitingcaseforthesupplyofAFWistheLossofFeedwater accidentat100'/opower.Theplantcondition atthetimeofthiseventwaslessthan5%power.Basedontheabove,itcanbeconcluded thatthepublic'shealthandsafetywasassuredatalltimes.V.CORRECTIVE ACTION:A.ACTIONTAKENTORETURNAFFECTEDSYSTEMSTOPRE-EVENT NORMALSTATUS:AFWflowwascontrolled asdesiredtomaintainS/Glevel.oTherunningAFWpumpsweresecured.B.ACTIONTAKENORPLANNEDTOPREVENTRECURRENCE:

TheITSwillberevisedtoeliminate theneedforhavingaMFWpumpbreakerclosedinthetestpositionduringMode2conditions.

Procedure 0-2.1willbeenhancedtoincludespecifically addressing thatthe52Sswitchactuating rodisinthecorrectpositionwhenthebreakerisrackedoutinthetestposition.

Vi.ADDITIONAL INFORMATION:

A.FAILEDCOMPONENTS:

NoneB.PREVIOUSLERsONSIMILAREVENTS:AsimilarLEReventhistorical searchwasconducted withthefollowing results:Nodocumentation ofsimilarLEReventswiththesamerootcausecouldbeidentified.

However,LERs96-004,96-008,and96-010aresimilareventswithdifferent rootcauses.C.SPECIALCOMfvlENTS:

NoneNRCFORM9"~A(4-95)

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