ML17261A938

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Forwards Response to Generic Ltr 89-13 Re Svc Water Problems Affecting safety-related Equipment.Circulating Water Chlorination,Using Sodium Hypochlorite to Prevent Biofouling,Performed Twice Per Wk from May Through Oct
ML17261A938
Person / Time
Site: Ginna Constellation icon.png
Issue date: 01/29/1990
From: MECREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To:
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION I)
References
GL-89-13, NUDOCS 9002120077
Download: ML17261A938 (10)


Text

ACCELERATEDDI<UTIONDEMONSTIONSYSTEM4REGULATORYINFORMATIONDISTRXBUTIONSYSTEM(RXDS)ACCESSIONNBR-9002120077DOC.DATE:90/01/29NOTARXZED:YESFACXL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterGAUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C.RochesterGas&ElectricCorp.RECIP.NAMERECIPIENTAFFILXATIONRegion1,OfcoftheDirectorDOCKET05000244

SUBJECT:

ForwardsresponsetoGenericLtr89-13resvcwaterproblemsaffectingsafety-relatedequipment.DISTRIBUTIONCODE:A065DCOPIESRECEIVED:LTRENCLSIZE:TXTLE:GenericLtr89-13-SvcWaterSysProblemsAffectingSafety-RelatedEDSNOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244RECIPIENTIDCODE/NAMEJOHNSON,AINTERNAL:CHU-~ANRR/PD1-3EGFIEXTERNAL:LPDRNSICCOPIESLTTRENCL1111111111RECXPIENTIDCODE/NAMENUDOCS-ABSTRACTNRCPDRCOPIESLTTRENCL11D(SDNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR7ENCL7DD

'//'I////K57M/////galOafseC,///Il/i///////I/////AP,::ROCHESTERGASANDELECTRICCORPORATIONo89EASTAVENUE,ROCHESTER,NY.146490001January29,1990KKKKPH0Nf.ARK*COOK7IK546-2700U.S.NuclearRegulatoryCommissionRegionalAdministrator,RegionI475AllendaleRoadKingofPrussia,PA19406

Subject:

ResponsetoGenericLetter89-13,ServiceWaterSystemProblemsAffectingSafety-.RelatedEquipmentR.E.GinnaNuclearPowerPlantDocketNo.50-244

DearMr.Russell:

ZnresponsetoGenericLetter89-13,pleasefindattachedsummariesofproposedprogramsthatRochesterGasandElectricintendstoimplementtosatisfyeachofthefiverecommendationsofsubjectletter.Youwillnotethatseveraloftheseprogramshavealreadybeeninitiated.Verytrulyyours,RobertC.MecredyGeneralManagerNuclearProductionSubscribedandsworntobeforemeonth29thdayofJanuary,1990SAMUELRSAOWNBNTARYPU8UC,SaoctNewYo4Nn,49170i1hQnueOy.lWins+.QCenerhshnBphaDee.26I,1+fP~//)<IIl'llCJMN076Attachment9002120077900i29PDRADOCK05000244PDC BHNOA8AJBUMA8koYeeNhcaOPXLRNATNtt4ttQM~haA.QeqNl.+endNdh8M)"'t~M~n~~.,

zc:Mr.AllenR.Johnson(MailStop14D1)ProjectDirectorateI-3U.S.NuclearRegulatoryCommissionWashington,D.C.20555U.S.NuclearRegulatoryCommissionDocumentControlDeskWashington,D.C.20555GinnaSeniorResidentInspector lATTACHMENTRESPONSETOGENERICLETTER89-13ThisresponsetotherequirementsofNRCGenericLetter89-13describestheintentofRG&EtoimplementRecommendationsI-Vortoestablishequallyeffectivecoursesofaction.RECOMMENDATIONIADDRESSINGTHECONCERNSOFGENZRICISSUE51ItemATheintakestructureshouldbevisuallyinspected,onceperrefuelingcycle,formacroscopicbiologicalfoulingorganisms(forexample,bluemusselsatmarineplants,Americanoystersatestuarineplants,andAsiaticclamsatfreshwaterplants),sediment,andcorrosion.Inspectionsshouldbeperformedeitherbyscubadiversorbydewateringtheintakestructureorbyothercomparablemethods.Anyfoulingaccumulationsshouldberemoved.~ResnseGinnaunderwaterservicewaterstructuresandequipmenthaveperiodicallybeenvisuallyinspected'hroughouttheoperatinghistoryoftheplant.ProcedureM-92,UnderwaterInspectionofMechanicalEquipmentand'StructuresintheScreenhouse(performedannually),ProcedureM-92.1,UnderwaterInspectionandMaintenanceoftheIntakeStructureandShaft(performedevery5years),andProcedureM-92.2,InserviceInspectionofMiscellaneousWaterControlStructuresatGinna(performedannually)arecurrentlyinplaceandutilizedatGinnaStation,and.havebeenshowntobeeffectivebasedonthehistoricaloperabilityandreliabilityoftheServiceandCirculatingWaterSystems.ItemBTheservicewatersystemshouldbecontinuously(forexample,duringspawning)chlorinated(orequallyeffectivelytreatedwithanotherbiocide)wheneverthepotentialforamacroscopicbiologicalfoulingspeciesexists(forexample,bluemusselsatmarineplants,Americanoystersatestuarineplants,andAsiaticclamsatfreshwaterplants).Chlorinationorequallyeffectivetreatmentisincludedforfreshwaterplantswithoutclamsbecauseitcanhelppreventmicrobiologicallyinfluencedcorrosion.However,thechlorination(orequallyeffective)treatmentneednotbeasstringent,forplantswherethepotentialformacroscopicbiological.foulingspeciesdoesnotexistcomparedtothoseplantswhereitdoes.PrecautionsshouldbetakentoobeyFederal,State,andlocalenvironmentalregulationsregardingtheuseofbiocides.

~ResonsettCirculatingwaterchlorinationusingsodiumhypochloritetopreventbiofoulingisperformedtwiceweeklyfromMaythroughOctober.GinnaStationStatePollutionDischargeEliminationSystem(SPDES)Permitlimitschlorinationto120minutesperdaywiththedailymaximumtotalresidualchlorinelimitedto0.2mg/L.NewYorkStateDepartmentofEnvironmentalConservation(NYDEC)hasstressedchlorineminimizationforanumberofyears.Bothreducedresidualchlorineallowedduringchlorination-fromOe5mg/Lto0.2mg/Lat.thelastSPDESPermitrenewal-andreducedfrequencyofchlorinationhavebeenstressed.Informally,RochesterGasandElectrichasgraduallyreducedthechlorinationseasonandthefrequencyofchlorinationduringtheseason.GinnaStationSPDESPermitrenewalhearingsarecurrentlyunderway.Applicationparameters,includingchlorinationpracticesfornormalcircumstancesarebeingdiscussedaswellaspossiblecoursesofactionintheadventofzebramusselmigrationtoGinnaStation.SeeItemD.below.ItemCRedundantandinfrequentlyusedcoolingloopsshouldbeflushedandflowtestedperiodicallyatthemaximumdesignflowtoensurethattheyarenotfouledorclogged..Othercomponentsintheservicewatersystemshouldbetestedonaregularscheduletoensurethattheyarenotfouledorclogged.Servicewatercoolingloopsshouldbefilledwithchlorinatedorequivalentlytreatedwaterbeforelayup.Systemsthatuserawservicewaterasasource,suchassomefireprotectionsystems,shouldalsobechlorinatedorequallyeffectivelytreatedbeforelayuptohelppreventmicrobiologicallyinfluencedcorrosion.PrecautionsshouldbetakentoobeyFederal,State,andlocalenvironmentalregulationsregardingtheuseofbiocides.R~esonseAflushingprogramfortheservicewatersystemwillbeestablishedat,GinnaStationonlyasneededtoaugmentperiodicinspectionsnowrequiredaspartofRG&E'sInserviceTestingProgram,whichrequiresfullflowtestingorinspectionanddisassemblyofallcheckvalvestoensureadequateServiceWaterflowtosafety-relatedequipment.ApolicyofchlorinationforlaidupServiceWaterloopswillbeperformedasdescribedinGenericLetter89-13exceptfortheFireSystem.Ginna'scomprehensiveyearlyFireSystemtestingandinspectionprogramscontrolledbyproceduresadequatelydetectsystemfoulingordegradation.

ItemDttSamplesofwaterandsubstrateshouldbecollectedannuallytodetermineifAsiaticclamshavepopulatedthewatersource.Waterandsubstratesamplingisonlynecessaryatfreshwaterplantsthathavenotprevi.ouslydetectedthepresenceofAsiaticclamsintheirsourcewaterbodies.IfAsiaticclamsaredetected,utilitiesmaydiscontinuethissamplingactivityifdesired,andthechlorination(orequallyeffective)treatmentprogramshouldbemodifiedtobeinagreementwithparagraphBabove.~ResnseStartingin1990,thefollowingmonitoringprogramswillbeinstitutedfortheAsiaticclams(Corbiculas.)andthezebramussel(Dreissenaolorha):A)Anannualbenthicsamplingprogramwillbeconducted.Sampleswillbetakenfromthefollowingtransects:1)thenearshorearea(toadepthof5meters)oftheGinnaNuclearPowerPlant;2)neartheplantintakestructure.Thesampleswillbeexaminedforthepresenceofbivalvemollusks.B)IntakecoolingwaterwillbesampledtwiceamonthfromMaythroughAugust.Thesampleswillbeexamined.forpresenceofbivalvemollusks.C)Representativecomponentsoftheservicewatersystem(i.e.,dieselgeneratorcoolers)willbeinspectedforthepresenceofbivalvemolluskswhenopenedduringannualoutages.IfthepresenceofeithertheAsiaticclamorthezebramusselisdeterminedbyanyoftheabovemethods,futuremonitoringforthatspecieswillbeterminated.Ifneithermolluskisfound,themonitoringwillcontinueonlyforspeciesthatarecapableofsurvivingintheareaoftheGinnaNuclearPowerPlant.MonitoringwouldbediscontinuedforthosespeciesonwhichdocumentationisavailablestatingthatitwouldnotbeabletosurviveinLakeOntario.RECOMMENDATIONIIHEATTRANSFERCAPABILITYTESTPROGRAM~ResenseRG&EwillcontinuetoperformregularmaintenanceoftheServiceWater-relatedheatexchangers.Duringthe1989RefuelingOutage,thefollowingheatexchangerswereinspected,disassembledand.cleaned:a)ComponentCoolingWater(both)b)SpentFuelPitc)EmergencyDieselGenerator(both)d)TurbineLubeOilCoolere)AuxiliaryFeedwaterPumps(all3)f)ElectroHydraulicOilCooler(both)

Thefollowingareeduledforthe1990RefugOutage:1)EmergencyDieselGenerator(both)2)TurbineLubeOilCooler3)AuxiliaryFeedwaterPumps(all3)4)ElectroHydraulicOilCooler(both)Nosignificantlevelsoffoulingwerenotedtodateinheatexchangersafter20yearsofoperation.RG&Eisalsodeterminingthefeasibilityofperformingperiodictestsofselectedheatexchangers,inaccordancewithEnclosure2to.GenericLetter89-13.Thepurchaseofadditionalinstrumentation,developmentoftestprocedures,andestablishmentofacceptancecriteriawillbepursued.Atestingschedulewillbeestablishedbasedontheresultsoftheseeffortsbythe1992RefuelingOutage.TheclosedcycleComponentCoolingWaterheatexchangersareconsideredwithinthescopeoftheprogram.However,becauseofthefavorableinspectionresultsduringthe1988and1989RefuelingOutages,showingnegligibledeteriorationafterlongyearsofoperation,andbecauseofthestringentchemistrycontrolassociated.withtheCCWloop(maintainingpHbetween8.0and9.0byadditionofsodiumhydroxideandmaintainingchromateconcentrationbetween175and225ppmbyadditionofpotassiumchromate),noadditionaltestingisscheduledunlessperiodicinspections,indicateadegradationoftheheatexchangers.RECOMMENDATIONIXIESTABLISHROUTINEMAINTENANCEANDINSPECTIONPROGRAM~ResenseAsnotedinResponseII,RG&E'asbeenperformingroutineinspectionofsafety-related(includingService.Water)heatexchangers.RG&E.hasalsoinitiatedaReliabilityCenteredMaintenanceProgram,whichincludestheServiceWaterSystem.Thisprogram,previouslydiscussed.withtheNRC,isastate-of-the-artsystemusedtooptimizemaintenanceactivitiesforthesystemswithin-itsscope.It,isconsideredthatthesemeasuresconstituteanacceptablelevelofinspectionand.maintenancetomeettherecommendationsofGenericLetter89-13.RECOMMENDATIONIVCONFXRMATXONOFINTENDEDFUNCTION~ResonseRG&Ehas,aspartofourP&IDUpgradeProgram,completedasystemwalkdownasofDecember29,1989.Thiseffortreconciled.theas-builtsystemwithourcontrolledconfigurationdrawings(theP&IDs).Inaddition,RG&Eisintheprocessofperformingaconfirmatorysingleactivefailureanalysisreview.AlthoughRG&Eintendstocompletethisreviewprior-totheendofthe1991RefuelingOutage,in-accordancewithGenericLetter89-13,thefullscopeofthisreviewhasnotyetbeenestablished.If-additionaltimeisrequired,RG&EwillinformtheNRC.

ftECOMMENDATIONVCONFXRMATIONTHATSERVXCEWATERSYSXLLFUNCTXONASINTENDEDANDTHATEUIPMENTWXLLPERFORMEFFECTIVELY~ResonseNormally,theGinnaMaintenance,OperatingandEmergencyOperatingProceduresareallreviewedonaregularthreeyearschedule.MaintenanceProceduresaregivenfurtherreviewasdeterminedbyfocusedresultsthroughtheeffortsofGinna'scontinuingReliabilityCenteredMaintenanceProgram.EmergencyOperatingProceduresreceiveanadditionallevelofreviewbythePlantEmergencyOperatingProceduresCommittee.AlloftheaboveproceduresarevalidatedthroughtheeffortsoftheGinnaINPOaccreditedOperatingandMaintenanceTrainingProgramstoensurethatsafety-relatedequipmentcooledbytheServiceWaterSystemwillfunctionasintendedandthattheequipmentwillperformeffectively.

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