ML17262A456

LER 91-004-00:on 910328,emergency Generator B Started Due to Potential for Severe Weather While Operating W/Rcs in Reduced Inventory Condition.Generator Removed from Svc & Realigned for Auto standby.W/910426 Ltr

ML17262A456
Person / Time
Site:	Ginna
Issue date:	04/26/1991
From:	BACKUS W H, MECREDY R C ROCHESTER GAS & ELECTRIC CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
LER-91-004, LER-91-4, NUDOCS 9105010167
Download: ML17262A456 (18)

Text

ACCELERATE~ISTBIEUTIONDEMOPOTATIONSySTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9105010167DOC.DATE:91/04/26NOTARIZED-NODOCKETFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit.1,RochesterG05000244AUTH.NAMEAUTHORAFFILIATIONBACKUS,W.H.=RochesterGas:&ElectricCorp.MECREDY,R.C.RochesterGas&ElectricCorp.RECIP.'NAMERECIPIENTAFFILIATIONI

SUBJECT:

LER91-004-00:on910328,manualstart&loadingof"B"emerqencydieselgenerator.Causedbysevereweater&justa.fiableconservatismonpartofplantstaff.Nocorrectiveactionsnoted.W/910426ltr.DISTRXBUTIONCODE:IE22TCOPIESRECEIVED:LTRfENCLSIZE:TITLE:50.73/50.9LicenseeEventReport(LER),incidentRpt,etc.NOTES:LicenseExpdatei.naccordancewith10CFR2,2.109(9/19/72).05000244RECIPIENTIDCODE/NAMEPDl-3LAJOHNSON,AINTERNAL:ACNWAEOD/DSP/TPABNRR/DET/ECMB9HNRR/DLPQ/LHFB11NRR/DOEA/OEABNRR/DST/SELBSDNRR/DSX/SP~SD1REG~XXiEP~0RGN1l.I1R01EXTERNALEG&GBRYCEIJ~HNRCPDRNSICPOORE,W.COPIESLTTRENCL11112211'111111111.-11111331111RECIPIENTIDCODE/NAMEPD1-3PDAEOD/DOAAEOD/ROAB/DSPNRR/DET/EMEB7ENRR/DLPQ/LPEB10NRR/DREP/PRPB11NRR/DST/SICB7E'RR/DST/SRXBSERES/DSXR/EIBLSTLOBBYWARDNSXCMURPHY,G.ANUDOCSFULLTXTCOPIESLTTRENCL1111221'1'22111111111111NOTETOALL"RIDS"RECIPIENTS:PLEASE,HELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.,20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!FULLTEXTCONVERSIONREQUIREDTOTALNUMBEROFCOPIESREQUIRED:LTTR31ENCL31

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Subject:

LER91-004,ManualStartandLoadingof"B"EmergencyDieselGenerator,DueToPotentialSevereWeather,ConditionsWhileOperatingatReducedInventoryInTheRCSR.E.GinnaNuclearPowerPlantDocketNo.50-244ThiseventisbeingvoluntarilyreportedusingtheguidanceofNUREG1022,andSupplementNo.1toNUREG1022.Thiseventisrelatedto,butdoesnotmeet,thereportingrequirementsof10CFR50.73,items-(a)(2}(iii}and(a)(2)(iv).Item(a)(2)(iii)requiresreportingof"anynaturalphenomenonorotherexternalconditionthatposedanactualthreattothesafetyofthenuclearpowerplantorsignificantlyhamperedsitepersonnelintheperformanceofdutiesnecessaryforthesafeoperationofthenuclearpowerplant."Item(a)(2)(iv)requiresreportingof"anyeventorconditionthatresultedinthemanualorautomaticactuationofanyEngineeredSafetyFeature(ESF),includingtheReactorProtectionSystem(RPS).However,actuationofanESF,includingtheRPS,thatresultedfromandwaspartofthepre-plannedsequenceduringtestingorreactoroperationneednotbereported."TheattachedLicenseeEvent.ReportLER91-004isherebyvoluntarilysubmitted.Thiseventhasinnowayaffectedthepublic'shealthandsafety.Vertrulyyours,XC:910501016791042c'nPDRaDOCKO-OOO=448PDRRobertC.MedyU.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaUSNRCSeniorResidentInspectorp/

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0 MRCform555AI943II;ICENSEEEVENTREPORT(LERITEXTCONTINUATIONU5IIUCLKARRTOULATORYCOMMITSIOHASSROVEOOMIRO3I50&IOIfTRSIR55TITlr55fACILITYNAM5IIIOOCK5TNUMRKRITIvTAIILTRMVM05RI~I554VTrrTIALv'TYrOKlrrRVMTRI'rVM~A45OlIR.E.GinnaNUclearPowerPlantTTIITIA'R>>>>M>>CO,>>~.v~frrTCfrs~LUIITI05000244004-0002OF07PRE-EVENTPLANTCONDITIONSThe.plantwasinthecoldshutdown.conditionfortheAnnualRefueling/MaintenanceOutage.ReactorCoolantSystem(RCS)pressurewaszero(0)psigandtheaverageofthefour(4)connectedcoreexitthermocouples(CETs)wasapproximately100P.The"BLTResidualHeatRemoval(RHR)pumpwasinoperationforreactorcoredecayheatremoval.TheplantwasbeingmaintainedatRCSreducedinventoryperoperatingprocedure0-2.3.1(Drainingand'perationatReducedInventoryoftheReactorCoolantSystem)withRCSLoopLevelatapproximately12inches.Atapproximately0120EST,March28,1991,theRochesterGasandElectricCorporation(RG6E)PowerControlDispatcher.notifiedtheGinnaControlRoomofadverseweathercondi-tions,(i.e.tornadoesandthunderstorms)inOntario,Canada,approximately50milesnorthoftheGinnaNuclearPowerPlant.Atapproximately0130EST,March28,1991,theRG&EPowerControlDispatchernotifiedtheGinnaControlRoomofthunderstormsandlossesofpowerinBuffalo,NewYork,approximately60mileswestoftheplant.Theyindicatedthatthestormwasmovingeastatapproximately70milesperhour.DiscussionswereheldbetweentheOperationsShiftSuper-visorandtheOutageCoordinatorabouttheweatherconcernsandthefacttheplantwasoperatingwiththeRCSinareducedinventorycondition.DuetothesensitivitytolossofRHR,itwasdecidedthataprudentactionwouldbetostartandloadadieselgenerator.4RCSORMTOSAI545I

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MACterrrr55AAI%431LICENSEEEVENTREPORT(LER)TEXTCONTINUATIONU.5.IIUCLfA1154ULATOATCOMMITSIOMA&AOVCOOM5rIO5IM&IOA5)ltr155'5/$1%5I'ACILITYMAM5lllOOCK5TMUM451151I.j1IIUM451I~IN54MirrTIALMrr5vrIOrrM1PA4515IR.E.GinnaNuclearPowerPlantTEXTIIIrrrerrrcerrreerrr.rrarereoerefrrCfere~5IIITIosooo24491-004-00040'7METHODOPDISCOVERY:ThepotentialeventwasmadeapparentbynotificationfromtheRGGEPowerControlDispatcheronweatherconditions.OPERATORACTION:TheControlRoomoperatorsstartedthe"B"EmergencyDieselGeneratorandtieditintoSafeguards480VoltBusf17.Subsequently,afterthestormhadpassedthroughthearea,theControlRoomoperatorsremovedthe"B"EmergencyDieselGeneratorfromserviceandrealigneditforautostandby.HighersupervisionandtheNuclearRegulatoryCom-mission(NRC)werenotifiedofthe'B"EmergencyDieselGeneratoroperation.G.SAFETYSYSTEMRESPONSES:The"B"Emergency.DieselGenerator,afteritwasmanuallystartedandtiedtosafeguards480VoltBusf17,operatedasdesigned.IIICAUSEOR&TENTA.'MMEDIATECAUSE:ThemanualstartingandtyingintoSafeguards480VoltBusf17ofthe"B"EmergencyDieselGeneratorwasduetoapotentialsevereweatherconditionmaterializing,whiletheplantwasoperatingwiththeRCSinareducedinventorycondition.11Cf41M515A<54)I

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t IIACfons$AAAISAIl.'ICENSEEEVENTREPORTlLER)TEXTCONTlNUATlON~I'I.I.NIICLTAAAEOULATOIIYCOVVI$$IONAffAOV$0OVINO3ITO~IIVI$IIfIR$$$QI%$fACILITYNAV$IIIR.E.GinnaNuclearPowerPlantTEXTIII~NVcfenewel.vs~IIIICAWw~TIIITIOOCIIATNIIVICRITIo5ooo24491LtIIIILIVO$%I$I$AQMANTIAL:YOKlHVAYVA-,,004-00IIAONITI06oF07However,duetothesensitivityoftheplantbeingintheRCSreducedinventoryconditionatthetimeoftheforecastofsevereweather,avoluntaryLERisdeemedappropriate.Anassessmentwasperformedconsideringboththesafetyconsequencesandimplications.ofthiseventwiththefollowingresultsandconclusions:oThe"B"EmergencyDieselGeneratoroperatedasdesigned.oBothoffsitepowersourceswere.eitherinserviceoravailablethroughouttheevent.oDuetothepotentialforsevereweatherconditionswhiletheplantwasoperatingwiththeRCSinthe'educedinventorycondition,thedecision,tostartthe"B"EmergencyDieselGeneratorwasjustifiable.Basedontheabove,itcanbeconcludedthatthepublic's,healthandsafetywasassuredatalltimes.CORRECTIVEACTIONAACTXONTAKENTOXU"HEWAFFECTEDSYSTEMSTOPRE-EVENTNORMALSTATUSAfterthestormhadpassed'the"B"EmergencyDieselGeneratorwasremovedfromserviceandrealignedforautostandby.B.ACTZONTAKENORPLANNEDTOPREVENTRECURRENCESincethepotentialsevereweatherconditionswereanaturalphenomenon,nocorrectiveactionstopreventrecurrencearewarranted.NACfOAV$AAAI$43I

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