ML17261A967

Proposed Tech Specs Re Turbine Cycle & Auxiliary Feedwater Sys

ML17261A967
Person / Time
Site:	Ginna
Issue date:	02/20/1990
From:	ROCHESTER GAS & ELECTRIC CORP.
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ML17261A965	List: ML17261A964 ML17261A966 ML17261A967
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NUDOCS 9003010267
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ATTACHMENTARevisetheTechnicalSpecificationpagesasfollows:Remove3.4-13.4-23.4-3'.8-14.8-24.8-3Insert3.4-13.4-23.4-33.4-44.8-14.8-24.8-390030i0267900220PDRADOCK05000244PDC 3.4AlicabilitAppliestotheoperatingstatusofturbinecycle.Todefineconditionsoftheturbinecyclesteam-relievingcapacity,andtodefinetheAuxiliaryFeedwaterSystemandsupportingServiceWaterSystemoperationasnecessarytoensurethecapabilitytoremovecoredecayheat.TheStandbyAuxiliaryFeedwaterSystemprovidesadditionalassuranceofcapabilitytoremovecoredecayheatshouldtheAuxiliaryFeedwaterSystembeunavailable.3.4.1MAINSTEAMSAFETYVALVESSecificationExceptduringtestingofthemainsteamsafetyvalves,withtheRCStemperatureatorabove350'F,aminimumturbinecyclecodeapprovedsteamrelievingcapabilityofeight(8)mainsteamsafetyvalvesshallbeavailable.ActionWithoneormoremainsteamcodesafetyvalvesinoperable,restoretheinoperablevalve(.s)tooperablestatuswithin4,hoursorbeinhotshutdownwithinthenext6hoursandatanRCStemperaturelessthan350'Fwithinthefollowing6hours.3.4.2AUXILIARYFEEDWATER3.4.2.1MOTOR-DRIVENAUZILIARYFEEDWATERSYSTEMSecificationWiththeRCStemperatureatorabove350'F,bothmotor-drivenauxiliaryfeedwaterpumpsmustbeoperable,eachwithanoperableflowpathfromthecondensatestoragetankstoitsrespectivesteamgenerator.Actiona.Withonemotor-drivenauxiliaryfeedwaterpumpinoperableandatleastoneturbine-drivenauxiliaryfeedwaterpumpflowpathoperable,restorethepumptooperablestatuswithin7daysorbeinatleasthotshutdownwithinthenext6hoursandatanRCStemperatureless.than350'Fwithinthefollowing6hours.AmendmentNo.gg"3.4-1Proposed b.Withbhmotor-drivenauxiliafeedwaterpumps'inoperable,andatleastoneturbine-drivenauxiliaryfeedwaterpumpflowpathoperable(see3.4.2.2),orwithamotor-drivenandturbine-driven'ump(orbothflowpaths)inoperable,restoreapumptooperablestatuswithin24hoursor.beinatleasthotshutdownwithinthenext6hoursandatanRCStemperaturelessthan350'Fwithinthefollowing6hours.c.Withallauxiliaryfeedwaterpumpsinoperable(motor-driven,turbine-driven,andstandby),immediatelyinitiatecorrectiveactiontorestoreanyofthesepumpstooperablestatusassoonaspossible.3.4.2.2TURBINE-DRIVENAUXILIARYFEEDWATERSYSTEMSecificationWiththeRCStemperatureatorabove350F,theturbine-drivenauxiliaryfeedwaterpumpassociatedflowpathsfromthecondensatestoragetankstothesteamgenerators,andflowpathsofsteamfromeachsteamgeneratortothepumpturbine,mustbeoperable.Theturbine-drivenauxiliaryfeedwaterpumpmustbeshowntobeoperablepriortoexceeding5'tpower.Actiona.Withtheturbine-drivenauxiliaryfeedwaterpumpand/orbothassociatedflowpathsinoperable,restorethepump(andatleastoneflowpath)tooperablestatuswithin72hoursorbeinatleasthotshutdownwithinthenext6hoursandatanRCStemperaturelessthan350'Fwithinthenext6hours.b.Withoneassociated.flowpathoftheturbine-drivenauxiliaryfeedwaterpumpinoperable,restoretooperablestatuswithin7daysorbeinatleasthotshutdownwithinthenext6hoursandatanRCStemperaturelessthan350'Fwithinthenext6hours.3-4.2.3STANDBYAUXILIARYFEEDWATERSYSTEMSecificationWiththeRCStemperatureatorabove350F,twostandbyauxiliaryfeedwaterpumpseachwithanassociatedflowpathfromtheservicewatersystemtoitsrespective,steamgenerator,shallbeoperable.Actiona.Withonestandbyauxiliaryfeedwaterpumpinoperablerestorethepumptooperablestatuswithin14daysorbeinhotshutdownwithinthenext6hoursandatanRCStemperaturelessthan350'Fwithinthefollowing6hours.AmendmentNo.gg"3.4-2proposed Pt b.Withbostandbyauxiliaryfeedwerpumpsinoperablerestoreatleastonestandbyauxiliaryfeedwaterpumptooperablestatuswithin7daysorbeinatleasthotshutdownwithin6hoursandatanRCStemperaturelessthan350Finthefollowing6hours.3.4.3SOURCESOFAUXILIARYFEEDWATERSecificationa.WiththeRCStemperatureatorabove350F,thefollowingsourcesofauxiliaryfeedwatershallbeoperable:1)Oneormorecondensatestoragetankswithaminimumof22,500gallonsofwater,and2)Servicewaterastheprimarysupplytothestandbyauxiliaryfeedwaterpumps.Actiona.Withthecondensatestoragetanksinoperable,within4hourseither:1)restorethecondensatestoragetankstooperablestatus,orbeinatleasthotshutdownwithinthefollowing6hoursandatanRCStemperaturelessthan350'Fwithinthefollowing6hours,OR2)demonstratetheoperabilityof.theservicewatersystemasawatersupplytothemotor-drivenandturbine-drivenauxiliaryfeedwaterpumpsandrestorethecondensatestoragetankstooperablestatuswithin7days,orbeinatleasthotshutdownwithinthefollowing6hoursand,atanRCS-temperaturelessthan350'Fwithinthefollowing6hours.b.Withtheservicewatersystemtooneorbothstandbyauxiliaryfeedwaterpump(s)inoperable,declarethestandbyauxiliaryfeedwaterpump(s)inoperableand.'omplywithSpecification3.4.2.3.BasisAreactorshutdownfrompowerrequiresremovalofcoredecayheat.Immediatedecayheatremovalrequirementsarenormallysatisfiedbythesteambypasstothecondenser.Therefore,coredecayheatcanbecontinuouslydissipated.viathesteambypasstothecondenserasfeedwaterinthesteamgeneratorisconvertedtosteambyheatabsorption.Normally,thecapabilitytoreturnfeedwaterflowtothesteamgeneratorsisprovidedbyoperationoftheturbinecyclefeedwatersystem.AmendmentNo.gg3.4-3Proposed Intheeventofarctorand'urbinetrip,ttherwithalossofoffsitepower,immediatedecayheatremovaliseffectedviathemainsteamsafetyvalves.Theeightmainsteamsafetyvalveshaveatotalcombinedratedcapabilityof6,580,000lbs/hr.Thiscapabilityexceedsthetotalfullpowersteamflowof6,577,279lbs/hr.Followingreactor/turbinetrip,themotor-drivenauxiliaryfeedwatersystemisautomaticallyinitiatedonlow-lowlevelinonesteamgenerator,aSafetyInjectionsignal,oratripofbothmainfeedwaterpumps.Theturbine-drivenauxiliaryfeedwaterpumpisinitiatedonlow-lowsteamgeneratorlevelinbothsteamgenerators,oralossofpowertoelectricalbuses11Aand11B.Themotor-drivenauxiliaryfeedwatersystemhastwo100-ocapacitypumps,eachnormallyservingonesteamgenerator.Theirsourcesofwaterincludethenormally-alignedbutnon-safety-relatedandnonSeismicCategoryIcondensatestoragetanks,andthesafety-relatedservicewatersystem.Theturbine-drivenauxiliaryfeedwatersystemconsistsofone200:capacitypump,twosteamsupplyflowpaths(onefromeachsteamgenerator),anormalsourceofwaterfromthenon-safety-relatedcondensatestoragetanks,and.abackupsourceofwaterfromthesafety-related.servicewatersystem."'heGinnaStationaccidentanalyses'assume200gpmisdeliveredtoanoperablesteamgenerator,inordertoremovetherequireddecayheat.Thecombinationofmotor-drivenandturbine-drivenauxiliaryfeedwaterpumpsassuresoperabilityofthesystemtomeettheserequirements,evenassumingasinglefailure.Intheeventofahighenergylinebreakoutsidecontainment,'theoperabilityofthemotor-drivenandturbine-drivenauxiliaryfeedwatersystemscannotbeensured,sincethesystemsarenotqualifiedfortheensuingharshenvironment.Thestandbyauxiliaryfeedwatersystem,whichconsistsoftworedundantpumps,adischargeflowpathtoeachsteamgeneratorandsuctionfrombothloopsofthesafety-related.servicewatersystem,performsthisfunction.OperatoractionfromthecontrolroomisrequiredtoeffectoperationoftheSAFWsystem.Theworst-caseanalysis,afeedwaterlinebreak,'hasbeenperformed,andtheconsequenceswerefoundtobeacceptable.Theminimumamountofwaterinthecondensatestoragetanksistheamountneededtoremovedecayheatfor2hoursafterreactortripfromfullpower.'Anunlimitedsourceforauxiliaryfeedwaterisavailableusingthesafety-relatedservicewatersystem.

References:

(1)UFSARSection10.5(2)UFSARSections15.2,15.3,15.6(3)"EffectsofHighEnergyPipeBreaksOutsidetheContainmentBuilding"submittedbyletterdatedNovember1,1973fromK.W.Amish,RochesterGasandElectricCorporationtoA.Giambusso,DeputyDirectorforReactorProjects.(4)L.D.White,Jr.lettertoMr.D.L.Ziemann,USNRCdatedMarch28,1980.(5)SEPTopicXV-6,FeedwaterSystemPipeBreaks,NRCSERdated9/4/813.4-4Proposed 4.8AUXILIARYMATERSYSTEMSAlicabilitAppliestoperiodictestingrequirementsoftheturbine-driven,motor-drivenauxiliaryfeedwaterpumps,andofthestandbyauxiliaryfeedwaterpumps.Toverifytheoperabilityoftheauxiliaryfeedwatersystemandthestandbyauxiliaryfeedwatersystemandtheirabilitytorespondproperlywhenrequired.Secification4.8.1Exceptwhenbelow350'Feachmotor-drivenauxiliaryfeedwaterpump,unlessitisdeclaredinoperablewithouttesting,willbestarted.atintervalsnottoexceedonemonthandaflowrateof200gpmestablished.4.8.2Exceptwhenbelow350'Fthesteamturbine-drivenauxiliaryfeedwaterpump,unlessitisdeclaredinoperablewithouttesting,willbestartedatintervalsnottoexceedonemonthandaflowrateof400gpmestablished.IfonedischargeflowpathisinoperableinaccordancewithSpecification3.4.2.2,aflowof200gpmmustbeestablished.Oncetheinoperabledischargeflowpathisreturnedtooperablestatus,aflowof400gpmmustbeestablishedwithin72hoursthereafter.4.8.3Exceptwhenbelow350'Ftheauxiliaryfeedwaterpumps'suction,discharge,andcrossovermotoroperatedvalvesshallbeexercisedatintervalsnottoexceedonemonth.4.8.4Exceptwhenbelow350'Feachstandbyauxiliaryfeedwaterpump,unlessitisdeclaredinoperablewithouttesting,willbestartedatintervalsnottoexceedonemonthandaflowrateof200gpmestablished.4.8.54.8.64.8.7Exceptwhen.below350Fthesuction,discharge,andcross-overmotoroperatedvalvesforthestandbyauxiliaryfeedwaterpumpsshallbeexercisedatintervalsnottoexceedonemonth.Thesetestsshallbeconsideredsatisfactoryifcontrolboardindicationandsubsequentvisualobservationoftheequipmentdemonstratethatallcomponentshaveoperatedproperly.Thesetestsshallbeperformedpriortoexceeding5%powerduringstartupifthetimesincethelasttestexceedsonemonth.Atleastonceper18months,contr'olofthestandbyauxiliaryfeedsystempumpsandvalves'romthecontrolroomwillbedemonstrated.4.8-1Proposed 4.8.8Atleastqnceer18monthsduringshutdn:a~Verifythateachautomaticvalveintheflowpathforeachauxiliaryfeedwaterpumpactuatestoitscorrectpositionuponreceiptofeachauxiliaryfeedwateractuationtestsignal.b.Verifythateachauxiliaryfeedwaterpumpstartsasdesignedautomaticallyuponreceiptofeachauxiliaryfeedwateractuationtestsignal.4.8e9EachinstrumentationchannelshallbedemonstratedoperablebytheperformanceoftheChannelCheck,ChannelCalibration,andChannelFunctionalTestoperationsforthemodesandatthefrequenciesshowninTable4.1-1.4.8.10Theresponsetimeofeachpumpand.valverequiredfortheoperationofeach"train"ofauxiliaryfeedwatershallbedemonstratedtobewithinthelimitof10minutesatleastonceper18months.BasisThemonthlytestingoftheauxiliaryfeedwaterpumpsbysupplyingfeedwatertothesteamgeneratorswillverifytheirabilitytomeetminimumrequiredflowrates.Thecapacityofanyoneofthethreeauxiliaryfeedwaterpumpsissufficienttomeetdecayheatremovalrequirements."'roperfunctioningofthesteamturbineadmissionvalveandthefeedwaterpumpsstartwilldemonstratetheintegrityofthesteamdrivenpump."'onthlytestingofthestandbyauxiliaryfeedwaterpumpsbysupplyingwaterfromacondensatesupplytanktothesteamgeneratorswillverifytheirabilitytomeetminimumrequiredflowrates.Thestandbyauxiliaryfeedwaterpumpswouldbeusedonlyifallthreeauxiliaryfeedwaterpumpswereunavailable.'"'neofthetwostandby[pumpswouldbesufficienttomeetdecayheatremovalrequirements.Properfunctioningofthesuctionvalves.fromtheservicewatersystem,thedischargevalves,andthecrossovervalveswilldemonstratetheiroperability.Theoperabilityofthestandbyauxiliaryfeedwaterpumpflowpathsbetweenthepumpsandthesteamgeneratorsisdemonstratedusingwaterfromthetesttank..Testingoftheauxiliaryfeedwaterpumpsusingtheirprimarysourceofwatersupplywillverifytheoperabilityoftheauxiliaryfeedwaterflowpath.Verificationofcorrectoperationwillbemadebothfrominstrumentationwithinthemaincontrolroomandbydirectvisualobservationofthepumps.AmendmentNo.Xg4.8-2Proposed

References:

,(1)FSAR-Section10.5(0)FSAR-Sections15.2,15.3,15.6I(3)"EffectsofHighEnergyPipeBreaksOutsidetheContainment{Building"submittedbyletterdatedNovember1,1973fromK.W.Amish,RochesterGasandElectricCorporationtoA.Giambusso,DeputyDirectorforReactorProjects,U.S.AtomicEnergyCommission.4.8-3proposed ATTACHMENTBThepurposeofthisAmendmentistoincorporateadditionalSpecificationsandActionStatementsregardingrequiredoperabilityoftheGinnaStationmotor-driven,turbine-drivenandstandbyauxiliaryfeedwaterpumps.Also,theformatoftheSpecificationsandActionStatementshave,beenmodifiedforclarity.Thedetailed,changesarelistedinTable1.Followingareactor/turbinetrip,themotor-drivenauxiliaryfeedwaterpumpsareautomaticallystartedonalow-lowsteamgeneratorlevelsignal,aSafetyInjectionsignal,oratripsignalfrombothmainfeedwaterpumps.Theturbine-drivenpumpisautomaticallyinitiatedbyalow-lowSGlevelinbothgenerators,aswellasalossofelectricalpowertobuses11Aand.11B.Inaddition,thestandbyauxiliaryfeedwaterpumpscandeliverflowtothesteamgenerators-inordertoremovetherequireddecayheat.Becauseofthenumberanddiversemeansofremovingdecayheatviatheauxiliaryfeedwaterpumps,theproposedSpecifications,althoughmodeledontheWestinghouseStandardTechnicalSpecifications,providesomeadditional"ActionStatement"timestoeffectrepairsintheeventacomponentorsystemisdeclaredinoperable.Theseproposed.TechnicalSpecificationsarealsobased.ontheNRC'sevaluationofRG&E'sMay9,1989ApplicationforanAmendmenttoSections3.4and.4.8,whichwasprovidedbyletterdatedNovember7,1989.Majorproposed.differencesfromtheNRC'sevaluationareasfollows:1.RG&E'sStandardNomenclatureforGinnaStation-doesnotincludetheterm"main"auxiliaryfeedwater.Thus,thisproposed,Amendmentusesthetermsmotor-driven,turbine-driven,andstandbyauxiliaryfeedwaterpumps.2.InSpecification3.4.2.l.b,withtwomotor-drivenAFWpumpsinoperable,ithasbeenproposedthat,iftheturbine-drivenauxiliaryfeedwaterpumpisoperable,24hoursbeallowedtoeffectrepairstoapump,ratherthanrequiringimmediateshutdownaction.Withtheturbine-drivenandstandbypumpsoperable,alldecayheat.removalrequirementswouldstillbemet,evenassumingasinglefailure.3.InSpecifications4.8.1and4.8.2,theNRCproposaltoperformsurveillancetestingonastaggeredbasiswouldbedifficulttoperform.AtGinnaStation,auxiliaryfeedwatertestingisperformed.byflowingintothefeedwatersystem.Thisrequiresapowerreduction(3%fortheturbine-drivenpump,and1%forthemotor-drivenandstandbypumps).Performingtestingonastaggered.basiswouldrequireadditionalpowerreductions,andmorefrequentsecondarywaterchemistryperturbations,whichRG&Ewishestoavoid.Thus,testingisproposed.tobemaintainedevery31days.

Xnaccordancewi10CFR50.91,thesecagestoTechnicalSpecificationshavebeenevaluatedtodetermineiftheoperationofthefacilityinaccordancewiththeproposedAmendmentwould:<I1.involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or2.createthepossibilityofanewordifferentkindofaccidentpreviouslyevaluated;or3.involveasignificantreductioninamarginofsafety.A'sexplained.intheabovediscussions,theproposedAmendmentincorporatesadditionalSpecificationsandActionStatements.Theseproposedchangesdonotincreasetheprobabilityorconsequencesofapreviously-evaluatedaccident,orcreateanewordifferentkindofaccident.Furthermore,thereisnosignificantreductioninthemarginofsafetyforanyparticularTechnicalSpecifications,andtheadditionofActionStatements,suchas3.4.2.1.a,hasincreasedthemarginsofsafety.Thedetailedchangesaredescribed.inTable1.Therefore,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisAmendment.requestareoutsidethecriteriaof10CFR50.91and.anosignificanthazardsfindingiswarranted.B-2 C

TABLE1CHANGEEFFECT1.ReformatSpecificationsintoSection3.4.1(mainsteamsafetyvalves);3.4.2(auxiliaryfeedwater,includingsubsections3.4.2.1motor-drivenauxiliaryfeedwatersystem,3.4.2.2turbine-drivenauxiliaryfeedwatersystemand3-.4.2.3standbyauxiliaryfeedwatersystem);and3.4.3(sourcesofauxiliaryfeedwater)withappropriateSpecificationandActionStatementslistedwithineachSection.Formatclarifications.2.Specification3.4.1incorporatespreviousSpecifications3.4.1.aand3.4.2.a,withminorwordingchanges.Formatchangeonly.Nochangeinmeaning.3.Section3.4.2.1includespreviousparagraphs3.4.1.b,3.4.2.b,and3.4.2.c.Backupsupplyfromservicewater'owincorporated.into3.4.3.Definitionofflowpathclarified.4.Section3.4.2.2iscomparabletopreviousSpecification3.4.1.c.ReferencetoservicewaterasbackupsupplyhasbeenmovedtoSection3.4.3.Increasedrestrictiononactionstobetakenintheeventamotor-drivenauxiliaryfeedwaterpumpisinoperable.ConsistentwithNRC11/7/89ModelSpecificationsII.A.3.aand.II.B.3.b.Withtwomotor-drivenauxiliaryfeedwaterpumpsoramotor-drivenandturbine-drivenauxiliaryfeedwaterpumpinoperable,anincreaserelativetoModelSpecificationsII.A.3.btoallow24hoursforrepairw'orkpriortoinitiatingshutdownactionisconsideredreasonable,sincetheremainingpumps,includingtheredundantstandbyauxiliaryfeedwaterpumpscouldperformtherequiredsafetyfunctions.Actionstatementshavebeenaddedtorequireshutdownactionsintheeventturbine-drivenauxiliaryfeedwatercomponentsaredeclaredinoperable.TheseareconsistentwithmodelSpecificationII.A.2.bandII.A.3.b.

e'.Specification3.4.2.3.iscomparabletopreviousSpecification3.4.1.e.ReferencetoservicewaterhasbeenmovedtoSection3.4.3.ThisiscomparabletopreviousSection3.4.1.eand3.4.2.d.TimingofshutdownactionsisconsistentwithNRCModelSpecificationsII.B.2and,II.B.3.6.Section3.4.3SourcesofAuxiliaryFeedwater.ThisisanewsectionbreakingoutthesourcesofAFWfrompreviousSpecifications3.4.l.b,3.4.1.c,3.4.1.d.,and.3.4.1.e.ConsistentwithNRCModelSpecificationsII.C.2andII.C.3.7.InSpecification4.8,thephrase"duringcoldorrefuelingshutdowns"hasbeenchangedto"whenbelow350F"ConsistentwithSpecification3.4,whichrequirestheAuxiliaryFeedwaterSystemtobeoperableatorabove350'F.8.Specification4.8.2hasbeenmodifiedtoallowforaflowtestrequirementof200gpmifoneturbine-drivenauxiliaryfeedwater-flowpathisinoperable(witha400gpmflowratetobeestablishedwithin72hourswhensecondflowpathbecomesoperable.Addedconsistency.AlsoconsistentwithNRCModelSpecificationIV,NRCcommentsunder4.8.10.