ML17262A433

Followup Rept of 910403 Event Re Removal of RHR Sys & Component Cooling Water Sys from Svc Due to Packing Leak from MOV-738B.Valve Manually Placed on Backseat & Leak Terminated

ML17262A433
Person / Time
Site:	Ginna
Issue date:	04/03/1991
From:	SPECTOR S M ROCHESTER GAS & ELECTRIC CORP.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
NUDOCS 9104090259
Download: ML17262A433 (6)

Text

ACCELERATEDDISTRIBUTIONDEMONSTRATIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9104090259DOC.DATE:91/04/03NOTARIZED:NODOCKETFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterG05000244AUTH.NAMEAUTHORAFFILIATIONSPECTOR,S.M.RochesterGas&ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)

SUBJECT:

Followupreptof910403eventreremovalofRHRsys&componentcoolingwatersysfromsvcduetopackingleakfromMOV-738B.Valvemanuallyplacedonbackseat&leak-terminated.DISTRIB'STIONCODE:IE22DCOPIESRECEIVED:LTR4ENCLLSIZE:TITLE:50.73/50.9LicenseeEventReport(LER),IncidentRpt,etc.DNOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244ARECIPIENTIDCODE/NAMEPD1-3LAJOHNSON,AINTERNAL:ACNWAEOD/DSP/TPABNRR/DET/ECMB9HNRR/DLPQ/LHFB11NRR/DOEA/OEABNRR/DST/SELB8DNPLB8D1REGFIL02FILE01EXTERNAL:EG&GBRYCE,J.HNRCPDRNSICMURPHY,G.ACOPIESLTTRENCL1111221111111111111111331111RECIPIENTIDCODE/NAMEPD1-3PDAEOD/DOAAEOD/ROAB/DSPNRR/DET/EMEB7ENRR/DLPQ/LPEB10NRR/DREP/PRPB11NRR/DST/SICB7ENRR/DST/SRXB8ERES/DSIR/EIBLSTLOBBYWARDNSICMAYS,GNUDOCSFULL'TXTCOPIESLTTRENCL11112211112,2111111111DDRDNOTETOALL"RIDS"RECIPIENTS:ADDPLEASEHELPUSTOREDUCEiVASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMP1-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR31ENCL31 nfpa+

<<'l~i~i7i7'fi/I2!7/Pgt"'"""IROCHESTERGASANDELECTRICii<<<<t+g~<<~%~AQ.104K,j~,!STATICrCORPORATION~89EASTAVENUE,ROCHESTER,N.Y.14649.0001'CLEP<0<<<<f,A<<<<KAcooE7lc5462700April3,1991U.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,DC20555

Subject:

Follow-upSummaryOfClose-OutOfApril3,1991UnusualEvent.R.E.GinnaNuclearPowerPlantDocketNo.50-244InaccordancewithNUREG0654,FEMA-REP-1,Rev.1reportingrequirementswhichrequiresawrittensummaryof"close-outorclassreductionconditions",theattachedclose-outsummaryfor'theApril3,1991UnusualEventisherebysubmitted.Thiseventhasinnowayaffectedthepublic'shealthandsafety.Verytrulyyours,xc'tanley.SpectorPlantManagerU.S.NuclearRegulatoryCommissionRegionI475AllendaleRoad.KingofPrussia,PA19406GinnaUSNRCSeniorResident,InspectorRichardBeldueRobertC.Mecredy9104090259910403PDRADOCK05000244F'DR ATTACHMENTFORCLOSE-OUTOFAPRIL31991UNUSUALEVENTOnApril2,1991at2335ESTthereactorwasintherefuelingmodewithrefuelinginprogress.TheReactorCoolantSystem(RCS)temperatureandpressurewereapproximately60Fand0psigrespectively.Maintenancepersonnelwereintheprocessofrepackingmotoroperatedvalve(MOV)-738B(CCWInletMOVtoRHRHXB)whichtheybelievedtobeisolated,butwasnot.AtthistimetheControlRoomwasnotifiedofapackingleakfromMOV-738B.Subsequentinvestigationofplantpipingandinstrumentdrawingsrevealedthattheleakwasnon-isolatable.AnattemptwasmadetoopenMOV-738Belectricallytoplacethevalveonthebackseatandstopthepackingleak.Thisattemptcausedtheleakratetoincreasetoapproximately25gallonsperminuteandMov-738Bwasclosedelectrically.Atapproximately2341EST,April2,1991aplantannouncementwasmadetoinformpersonneloftheComponentCoolingWater(CCW)spillintheAuxiliaryBuildingMezzanineLevel.Atapproximately0003EST,April3,1991,refuelingoperationswereterminatedandtheResidualHeatRemoval(RHR)systemandCCWsystemwereremovedfromservicetomanually.placeMOV-738Bonthebackseattostopthepackingleak.Alsoatapproximately0003EST,April3,1991,theOperationsShiftSupervisordeclaredanUnusualEventinaccordancewithEPIP1-0,"GinnaStationEventEvaluationandClassification",EAL:ColdShutdownActivities;PotentialLossofCoreCoolingDueToInabilityToMaintainResidualHeatRemovalSystemWhileInColdShutdown.TheseactivitiesmayincludelossofcoolingtotheRHRsystemsuchasaCCWorservicewatersystems.Alloff-sitenotificationsweremadeperEPIP1-5(Notifications).GinnaTechnicalSpecificationsspecificallyallowfortheremovalofbothRHRpumpsforuptoone(1)hourprovidedcoreoutlettemperatureismaintainedatleast10Fbelowsaturationandnooperationsarepermittedthatwouldcausedilution'fthereactorcoolantsystemboronconcentration.ItisnotedthatalthoughcompliancetotheGinnaTechnicalSpecificationswasbeingmaintained,theOperationsShiftSupervisorconservativelydeclaredtheUnusualEvent.Thisconservativeapproachactivatedtheresponseteamtoprovidesupportshouldconditionsfurtherdegrade.TheRHRsystemwasthenrunfortwominuteseveryfiveminutesduringthe.isolationofCCW.

At0027EST,April3,1991,MOV-738Bwasmanuallyplacedonitsbackseatandtheleakwasterminated.The"A"CCWpumpwasthenstartedandthe"A"RHRpumpwasrestarted.RHRdischargetemperaturewasnot'edtobeapproximately8Fhigherthanpriortotheevent.-Atapproximately0122EST,April3,1991,aftertheplantwasreturnedtopre-eventconditionsandallconcernsresolved,theOperationsShiftSupervisor,withapprovalandconcurrencefromthePlantManager,theSuperintendent-GinnaProduction,andtheOperationsManagerdeclaredtheUnusualEventterminatedinaccordancewithEPIP3-4(EmergencyDeclassificationandRecovery).Alloff-siteagencieswerenotifiedoftheterminationoftheUnusualEvent.