ML17262B044
| ML17262B044 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 10/08/1992 |
| From: | ROCHESTER GAS & ELECTRIC CORP. |
| To: | |
| Shared Package | |
| ML17262B042 | List: |
| References | |
| NUDOCS 9210160159 | |
| Download: ML17262B044 (22) | |
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AttachmentARevisetheTechnicalSpecificationpagesasfollows:RemoveInsert3.5-143~713.7-23~733.7-53.7-64.6-54.6-5a3.5-143~713~723~733e73a3.7-53.7-64.6-4a4.6-54.6-5aPDRADOCK05000244PDR
~iI 7.WiththenumberofoperablechannelslessthantheTotalNumberofChannels,operationmayproceedprovidedtheinoperablechannelisplacedinthetrippedconditionwithin1hour.ShouldthenextChannelFunctionalTestrequirethebypassofaninoperablechanneltoavoidthegenerationofatripsignal,operationmayproceeduntilthisChannelFunc-tionalTest.AtthetimeofthisChannelFunctionalTest,orifatanytimethenumberofoperablechannelsislessthantheMinimumOperableChannels,eithera)beatHotShutdownwithinthenext6hoursandanRCStemperaturelessthan350'Fwithinthefollowing6hours,or8.b)energizetheaffectedbuswithadieselgenerator.WiththenumberofoperablechannelsonelessthantheMinimumOperableChannelsrequired,restoretheinoperablechanneltooperablestatuswithin48hoursorbeinHotShutdownwithinthenext6hoursandatanRCStemperaturelessthan350'Fwithinthefollowing6hours.9.10.WiththenumberofoperablechannelsonelessthantheTotalNumberofChannelsrequired,operationmayproceeduntilthenextChannelFunctionalTestprovidedtheinoperable,channelisplacedinthetrippedpositionwithin1hour.AtthenextChannelFunctionalTest,oratanytimethenumberofoperablechannelsislessthantheMinimumOperableChannelsrequired,beatHotShutdownwithinthenext6hoursandatanRCStemperaturelessthan350'Fwithinthefollowing6hours.WiththenumberofoperablechannelsonelessthantheMinimumOperableChannelsrequired,restoretheinoperablechanneltooperablestatuswithin48hoursorbeinHotShutdownwithinanadditional6hours,andatcoldshutdownwithinthefollowing30hours.WiththenumberofoperablechannelslessthantheTotalNumberofChannels,operationmayproceedprovidedtheinoperablechannelisplacedinthetrippedconditionwithin2hours.ShouldthenextChannelFunctionalTestrequirethe[bypassofaninoperablechanneltoavoidthegenerationofanactuationsignal,operationmayproceeduntilthisChannelFunctionalTest.AtthetimeofthisChannelFunctionalTest,orifatanytimethenumberofoperablechannelsislessthantheMinimumOperableChannelsrequired,beatHotShutdownwithin6hoursandatColdShutdownwithinthefollowing30hours.AmendmentNo.493.5-14 h
3.7AUXILIARYELECTRICALSYSTEMSAlicabilitAppliestotheavailabilityofelectricalpowerfortheoperationofplantauxiliaries.Todefinethoseconditionsofelectricalpoweravailabilitynecessarytoprovideforthecontinuingavailabilityofengineeredsafeguards.3.7.13.7.1.1SecificationWhenincoldshutdownorrefueling,withfuelinthe(reactorvessel,thefollowingconditionsaretobemet:3.7.1.2a.Oneindependentoffsitepowersourceoperable,orbackfeedthroughunitauxiliarytransformer11;andb.Onetrainof480-voltbuses(14and18,or16and17)operable;andc.Onedieselgeneratoroperablewithonsitesupplyof5,000gallonsoffuelavailableandeitherbuses14and18,or16and17,capableofbeingsuppliedfromthatdieselgenerator.d.Onebatteryandonedcsystem,andatleast150ampsofbatterychargercapacitytothebatterymustbeoperable.e.Either120voltA.C.InstrumentBus1Aor1Cenergizedfromitsassociated.inverter.ActionsToBeTakenIfConditionsof3.7.1.1AreNotMet:Withlessthantheaboveminimumrequiredpowersourceoperable,immediatelysuspendalloperationsinvolvingpositivereactivitychanges,corealterations,movementofAmendmentNo.493~71Proposed 3.7.2irradiatedfuelandinitiatecorrectiveactiontorestoretherequiredpowersourcestooperablestatus.Secification3.7.2.1Thereactorcoolantsystemshallnotbetakenabovethemodeindicatedunlessthefollowingconditionsaremet:a;Abovecoldshutdown;1.Oneindependentoffsitepowersourceoperable.2.the480-voltbuses14and18(TrainA)andbuses16and17(TrainB)areenergized.3.thetwodieselgeneratorsareoperablewithonsitesupplyof5,000gallonsoffuelavailableforeachdieselgenerator.4.bothbatteriesandbothdcsystemsareoperable.5.atleast150ampsofbatterychargingcapacityforeachDCsystemthatisinservice.6.120voltA.C.InstrumentBuses1Aand1Careener-gizedfromtheirassociatedinverters.7.120voltA.C.InstrumentBus1Bisenergized,fromitsassociatedconstant.voltagetransformerfromMCC1C.b.Above350F:1.Allconditionsof3.7.2.1aabovearemet;and2.Twooffsitesources(34.5kv-4160voltstationservicetransformers,12Awithdedicatedcircuit751,and12Bwithdedicatedcircuit767)areopera-ble.3.7.2.2ActionsToBeTakenIfConditionsof3.7.2.1AreNotMet:a.Operationabove350'Fmaycontinuewithoneoffsitesourceinoperable,providedallremainingconditionsof3.7.2.1aremet.b.Withoneorbothindependentoffsitesourcesoperable,and.onedieselgeneratorinoperableabovecoldshutdown,demonstratetheoperabilityoftheremainingdieselgeneratorby:AmendmentNo.493~72Proposed 1.PerformingthesurveillancerequirementsidentifiedinSpecifications4.6.1.b.4and4.6.1.b.6within1hourandatleastonceper24hoursthereafterand.restoretheinoperabledieselgeneratortooperablestatuswithin7days;OTHERWISE:2.Reducetoamodeequaltoorbelowhotshutdownwithinthenext6hoursandbeincold,shutdownwithinthefollowing30hours.c.Withonesafetyrelated480VBus(i.e.,bus14or16or17or18)de-energized,re-energizethebuswithin1hourorreducetoamodeequaltoorbelowhotshutdownwithinthenext6hoursandbeincoldshutdownwithinthefollowing30hours,unlesscorrectiveactionsarecompletethatpermitcontinuedoperation(i.e.,thebusisreturned.toservice).d.Withbothindependentoffsitesourcesinoperable,bothdieselgeneratorsmustbeoperable.Inaddition,restoreoneindependentoffsitesourcewithin72hours,orreducetoamodeequaltoorbelowhotshutdownwithinthenext6hoursandbeincoldshutdownwithinthefollowing30hours.e.Operationabovecoldshutdownmaycontinueiflessthan150ampsofbatterychargingcapacityisavailabletoonedcsystem,providedatleast150ampsofbatterychargingcapacityisavailabletoeachdcsystemwithin2hours.IIfnotavailable,reducetoa'odeequaltoorbelowhotshutdownwithinthenext6hoursandbeincoldshutdownwithinthefollowing30hours.AmendmentNo.473~73Proposed f.WitheitherInstrumentBus1Aor1Cnotenergizedfromitsassociatedinverter:1.Re-energizethebuswithin2hours(backupormaintenancesupply),AND2.Re-energizethebusfromasafetyrelatedsupply(backuporinverter)within24hours,AND3.Re-energizethebusfromitsassociatedinverterwithin72hours,OTHERWISE4.Reducetoamodeequaltoorbelowhotshutdownwithinthenext6hoursandbeincoldshutdownwithinthefollowing30hours.g.WithInstrumentBus1Bnotenergized,fromitsassociatedconstantvoltagetransformer(CVT)fromMCC1C:2.Re-energizethebuswithin2hours(maintenancesupply),ANDRe-energizethebusfromitsassociatedCVTfromMCC1Cwithin7days,OTHERWISEReducetoamodeequaltoorbelowhotshutdownwithinthenext6hoursandbeincoldshutdownwithinthefollowing30hours.AmendmentNo.493'3aProposed I1J Safeshutdownoftheplant,and(2)themitigationandcontrolofaccidentconditionswithintheplant.WhentheRCSisabovecoldshutdown,bothemergencydieselgeneratorsarerequiredtobeoperable.Thetwodieselgeneratorshavesufficientcapacityto'startandrunalltheengineeredsafeguardsequipmentatdesignloads.The.safeguards'quipmentoperatedfromonedieselgeneratorcanadequatelycoolthecoreand.maintainthecontainmentpressurewithinthedesignvalueforanylossofcoolantincident.Theminimumdieselfueloilinventoryismaintainedtoassurethatbothdieselscanoperateattheirdesignratingsfor24hours.Thisassuresthatbothdieselscancarrythedesignloadsofrequiredengineeredsafeguardsequipmentforanylossofcoolantaccidentconditionsforatleast40hours,orforoneengineeredsafetyfeaturetrainfor80hours.'~'ommercialoilsuppliesandtruckingfacilitiesexisttoassuredeliverieswithin8hours.Theoffsitepowersourceconsistsofseparatededicated.34.5kv-4160voltstationservicetransformersservedbydedicated34.5kvlines(12Atransformerwithdedicatedcircuit751,or12Btrans-formerwithdedicatedcircuit767)inoperablestatus.EitheroffsitesourceofpowercansupplyallauxiliaryloadsandtransfercanbeaccomplishedwithinthetimeconstraintsofGDC17.Thus,GDC17isexplicitlymet.Withfuelinthereactorvesselaminimumofoneoffsitesource,oneonsitesourceofACpowerandoneDCpowertrainarerequired.Theoffsitepowersourcemaybeprovidedby,oneofthreeconfigura-tions:AmendmentNo.473.7-5 1.Transformer12Aserved,byadedicated34.5kvline(circuit751),or2.Transformer12Bservedbyadedicated.34.5kvline(circuit767),or3.Backfeedthroughunitauxiliarytransformer11.Theoffsitepowersourceisthepreferred,sourceofACpower.Operabilityofanoffsitesourcerequiresthatonestationservicetransformerservedbyadedicated34.5kvlineisoperatingandprovidingpowertotheunit.Theemergencydieselgeneratorprovidespoweruponlossoftheoffsitesource.Oneemergencydieselgeneratorwith5,000gallonsoffuelcanprovidepowertoaminimumlevelofengineeredsafeguardsequipmentfor40hours(therequiredsafeguardsloadsatcoldshutdown/refuelingaresignifi-cantlylessthanduringpoweroperation).Oneoperabledieselfueloiltransferpumpisrequiredtosupplyfuelfromoneofthetwofuelstoragetankstothedaytankoftheoperabledieselgenera-tor.WithlessthanoneoffsiteACpowersource,andoneonsiteACpowersource,oneDCpowertrain,andonebatterybackedinstrumentbusavailable,nooperationsinvolvingpositivereactivitychanges,corealterations,andmovementofirradiatedfuelshalloccur.Batterychargerswithatleast150ampscapacityshallbeinserviceforeachbatterysothatthebatterieswillalwaysbeatfullcharge.Thisensuresthatadequatedcpowerwillbeavail-able.Theplantcanbesafelyshutdownwithouttheuseofoffsitepowersinceallvitalloads(safetysystems,instruments,e'tc.)canbesuppliedfromtheemergencydieselgeneratorsandthestationbatteries.InstrumentBuses1A,1B,and1Cprovidepowertovitalplantinstrumentation.Allthreebusesarebackedupbysafetyrelatedemergencysupplies;buslAfrombattery1A,bus1Cfrombattery1B,andbus1Bfromdieselgenerator1A.AmendmentNo.493.7-6Proposed 4.6.4InstrumentBusesEachsafetyrelatedinstrumentbusrequiredtobeoperable,shallbedemonstratedoperableatleastonceper7daysby:1.VerifyingnominalvoltageindicationsontheIn-strumentBuses1A,1B,1C.2.VerifyingpropersupplybreakeralignmentforInstrumentBuses1A,1B,and1C.3.VerifyingproperstaticswitchalignmentforIn-strumentBuses1Aand.1C.AmendmentNo.47,494.6-4a Basis'hetestsspecifiedaredesignedtodemonstratethatthedieselgeneratorswillprovidepowerforoperationofequipment.Theyalsoassurethattheemergencygeneratorsystemcontrolsandthecontrolsystemsforthesafeguardsequipmentwillfunctionautomaticallyintheeventofalossofallnormal480VACstationservicepower.(X)Thetestingfrequencyspecifiedwillbeoftenenoughtoidentifyandcorrectanymechanicalorelectricaldeficiencybeforeitcanresultinasystemfailure.Thefuelsupplyandstartingcircuitsandcontrolsarecontinuouslymonitored.andanyfaultsareindicatedbyalarm.Anabnormalconditioninthesesystemscanbeidentifiedwithouthavingtotestthedieselgenerators.Periodictestsarealsospecifiedtodemonstratethattheoffsitepowersourceswillprovidepowerforoperationofequipment.Offsitepowersourceoperabilityrequirescorrectbreakeralignmentandindicated.poweravailabilityfromthetwopreferredpowercircuits,767and751,toth'e4160voltbuses.Theserequirementsaremetbymonitoringnominalvoltageindicationsonthehigh-voltagesideoftransformers12Aand.12B;andonthe4160voltbuses12Aand12B.Offsitepowersourceindependencerequiresseparate4160voltcircuitssupplyingpowertothe4160voltbuses.Interlockspreventconcurrentclosureof12AXand12BZ,OR12AYand12BY;andsurveillanceisspecifiedtoensureseparationismaintained.Instrumentbuspowersourceoperabilityrequirescorrectbreakeralignmentandindicatedpoweravailability.Theserequirementsaremetbymonitoringnominalvoltageindicationsonthebusesandproperbreakeralignment.Amendment.No.47,494.6-5 Furthermore,toassureindependencebetweenredundantClass1E480voltbuses14and18(TrainA)andbuses16and17(TrainB),tiebreakers52/BT16-14and52/BT17-18arerequiredtobeopenwhentheplantmodeisabove200F.Oncetiebreakersareopen,interlockspreventclosurewhenindependentandredundantbusesareenergized.Stationbatteriesmaydeterioratewithtime,butprecipitousfailureisextremelyunlikely.Thesurveillancespecifiedisthatwhichhasbeendemonstratedovertheyearstoprovide.anindicationofacellbecomingunserviceablelongbeforeitfails,andtoensure.thatthebatterycapacityisacceptable.Theequalizingcharge,asrecommendedbythemanufacturer,isvitaltomaintainingtheampere-hourcapabilityofthebattery.Asacheckupontheeffectivenessoftheequalizingcharge,thebatteryshouldbeloadedratherheavilyandthevoltagemonitoredasafunctionoftime.Tfacellhasdeterioratedorifaconnectionisloose,thevoltageunderloadwilldropexcessivelyindicatingreplacementormaintenance.Theminimumpermissible"on-sitefuelinventory,10,'000gallons,(5,000gallonsforeachgenerator),issufficientforoperationunderloss-of-coolantaccidentconditionsoftwoengineeredsafetyfeaturestrainsfor40hours,orforonetrainfor80hours,orforoperationofbothdieselgeneratorsattheirdesignratingsfor24hours.(2)References(1)UFSAR,Section8.3(2)UFSAR,Section9.5.4AmendmentNo.47,494.6-5A AttachmentBThepurposeofthisAmendmentistoincorporaterequirementsfortheoperabilityandsurveillanceofsafetyrelated.instrumentbusesintotheAuxiliaryElectricalSystemsTechnicalSpecifications.ThisAmendmentalsocorrectsaninconsistencyintheexistingrequiredactionstatementforalossofbothoffsite'owersupplies.ThedetailedchangesarelistedinTable1.IRequirementsforsafetyrelatedinstrumentbusoperabilityhavebeenaddedbasedonreactorcoolantsystemoperationaboveand.belowcoldshutdown.Previouslynoinstrumentbusoperabilityrequirements,requiredactions,norsurveillancerequirementswerespecifiedintheTechnicalSpecifications.Consequently,thisAmendmentisconsideredanenhancementtotheTechnicalSpecif-ications.ThechangesinthisAmendmentarebasedontheStandardTechnicalSpecificationsforWestinghousePressurizedWaterReactors(NUREG-0452),withdeviationstoaddressspecificdesignfeaturesattheGinnaStation.Specification3.7.1.1wasmodifiedtoaddtherequirementforonebatterybackedsafetyrelatedinstrumentbustobeoperableduringcoldshutdownandrefueling.Thephrase"whenincoldshutdownorrefueling"wasaddedtothisSpecificationsincepreviouslynoapplicablemodeswereexplicitlyspecified.Thisspecificationensurestheavailabilityofonechannelofcontinuousindicationwhileallowingformaintenanceand'surveillancetestingononesafetyrelatedbattery.Section3.7.2.1.awasmodifiedtoaddrequirementsforsafetyrelatedinstrumentbusoperabilityabovecoldshutdown.TheSpecificationrequiresoperabilityofbothbatterybackedinstru-mentbusesandtheemergencydieselgeneratorbackedinstrumentbus.AlthoughStandardTechnicalSpecificationsonlyprovideoperabilityrequirementsforbatterybackedbuses(i.e.vitalbuses),thedieselbackedbusatGinnaprovidespowerforinstru-mentationusedfortheReactorProtectionSystem'(RPS),EngineeredSafetyFeaturesActuationSystem(ESFAS),andforpostaccidentmonitoringfunctions.Thereforeoperabilityrequirementsarespecifiedforthisbus.Previoustechnicalspecificationsidentifiednooperabilityrequirementsforinstrumentbusesabovecoldshutdown.Thisspecificationrequiresallthreebusestobeoperable,andisthereforecons'ideredconservative.Section3.7.2.2.dwaschangedtorequireplantshutdowntothecoldshutdownmodeifnooffsitesourcesareavailable.ThisisconsideredaconservativechangesincepreviouslythespecificationonlyrequiredachievingaReactorCoolantSystemtemperaturebelow350'F.ThechangewasmadeduetoanapparentinconsistencywithSpecification3.7.2.1.a.1whichrequiredoneoffsitesourcetobeoperableabovecoldshutdown.Theactionsspecified.withinSection3.7.2.2.fproviderequirementswhenonesafetyrelated,batterybackedinstrumentbusisoutofservice.Thespecificationrequiresthebustobere-energizedwithintwohours,re-energizedfromasafetyrelatedsupplywithin24hours,andre-alignedtoitsbatterybackedsupplywithin72hours.TheGinnaStationsafetyrelatedbatterybackedinstrumentbuses(AandC)canbesuppliedfromthreesources:
1.ItsnormalsupplyfromasafetyrelatedDCbusviaaninverter;2.Abackupsupplyfromasafetyrelated480Vbus(dieselgeneratorbacked)viaaconstantvoltagetransformer;3.Amaintenancesupplyfromanon-safetyrelated480Vbusviaaconstantvoltagetransformer.StandardTechnicalSpecificationsdonotaddresstheavail-abilityofmultiplebackupsupplies.Assuch,thisproposedspecificationdeviatesfromtheStandardTechnicalSpecifica-tioninthatadditionaltimeisallowedtorestorethebustoitsnormalsupplyifthebusisre-energizedfromitssafetyrelatedbackupsupply.WheneitherinstrumentbusAorCissuppliedfromitssafetyrelatedbackupsupplytheplantisonlysusceptibletoasinglefailurecausinglossofthecontainmentsprayautomaticactuationsignal.Giventhelowprobabilityoftherequirementofthisfunction(largebreakLOCAormainsteamlinebreakincontainment),andtheavailabilityofmanualinitiation,theallowedtimeisconsideredappropriate.TheactionsspecifiedinSection3.7.2.2.gproviderequire-mentswhentheemergencydieselgeneratorbackedinstrumentbus(B)tobeoutofservice.Thespecificationrequiresthebustobere-energizedwithin2hoursandre-energizedfromitssafetyrelatedconstantvoltagetransformerwithin7days.TheStandardTechnicalSpecificationscontainnoactionrequirementsfordieselbackedinstrumentbusesoutofservice.InstrumentbusBhasonlyonealternatesupply,amaintenancesupplyfromanon-safetyrelated480Vbusviaaconstantvoltagetransformer.Againtheonlysafetyrelatedfunctionsusceptibletoasinglefailureisthecontainmentsprayautomaticactuationsignal.Thetimeallowedtorestorethebustoitsnormalsupplyischosenbased.onthelowprobabilitythatthisfunctionisrequired,thetimerequired.torepairorreplacefailedequipment,andtobeconsistentwiththeallowedoutofservicetimeforitssafetyrelatedbackupsupply(ref.Specification3.7.2.2.B.1)ActionStatement11ofTechnicalSpecificationSection3.5wasalsochangedtoallow2hourstoplaceaninoperableContainmentSprayautomaticinitiationchannelintrip.ThischangeprovidesconsistencywithSpecifications3.7.2.2.fandg.AninoperableinstrumentbuscausesaninoperableautomaticContainmentSprayinitiationchannelsincethisfunctionisenergizetoactuate.Noeasilyachievablemeans'xiststoplacetheinoperablechannelintripifinstrumentpowerisunavailable.Thisallowedtime(2hours,consistentwithNUREG-0452)isacceptableduetothelowprobabilityofrequiringtheautomaticinitiationfunction(LBLOCAorMSLBincontainment),andthecontinuedavailabilityofthemanualinitiationfunction.Thebasisforsection3.7wasmodifiedtoreflecttheseadditionalspecifications.Inadditionachangewasmadetothebasisforonsitedieselfueloilrequirements.ThischangeisaclarificationresultingfromtheElectrical 0~DistributionSystemFunctionalInspection(EDSFI)conductedatGinnain1991.Researchofthedesignbasisfortheminimumonsitefueloilstoragerequirementsrevealedthatstoragecapabilitywasspecifiedtoallowoperationofbothemergencydieselgeneratorsatdesignratingsfor24hours.Inresponsetoquestionsduringtheinitiallicensingoftheplant,thisrequirementwastranslatedintohoursthattheemergencydieselgeneratorswouldbeabletosupportEn-gineeredSafetyFeaturesloadsforalargebreakLOCA,andhoursthatthedieselswouldbeabletosupporthotstandbyoperation.Thehotstandbycomparisonisnotconsideredasafetyrelatedrequirementandhasthereforebeendeletedasabasisforthespecification.Theoriginal24hourre-quirementhasbeenadded,and.thesafetyrelated40hourrequirementretained.Section4.6.4wasaddedtotheTechnicalSpecificationstoprovidesurveillancerequirementsforthesafetyrelatedinstrumentbuses.Theserequirementsensureproperalignmentandfunctionalityofthebuses.Themethodologyandfrequen-cyisconsistentwithStandard.TechnicalSpecificationsurveillancerequirementsforvitalinstrumentbuses.ThebasisforSection4.6wasalsomodifiedtoprovidethebasisforthisnewrequirement,andtoclarifytheminimumonsitedieselfueloilrequirementasdescribed.above.Inaccordancewith10CFR50.91,thesechangestoTechnicalSpecificationshavebeenevaluatedtodetermineiftheoperationofthefacilityinaccordancewiththeproposedamendmentwould:1.involveasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated;or2..createthepossibilityofanewordifferentkindofaccidentpreviouslyevaluated;or3.involveasignificantreductioninamarginofsafety.Theseproposedchangesdonotincreasetheprobabilityorconsequencesofapreviouslyevaluatedaccidentorcreateanewordifferentkindofaccident.Further,thereisnounacceptablereductioninthemarginofsafetyforanyTechnicalSpecification.Therefore,RochesterGasandElectricsubmitsthattheissuesassociatedwiththisAmendmentareoutsidethecriteriaof10CFR50.91,andanosignificanthazardsfindingiswar-ranted.
TABLE1DETAILEDDESCR'IPTIONOFCHANGESPAGE3.5-143~713.7-13~723~73CHANGEActionStatement11.Changed"within1hour"to"within2hours"Section3.7.1.1Addedphrase"Whenincoldshutdownorrefueling,...."Section3.7.1.1.Addediteme.Section3.7.2.1.a.Addeditems6and7.Section3.7.2.2.d.Changedrequiredactionwithtwooffsitesourcesinoperable,torequireachievingcoldshutdown.REASONFORCHANGEThischangeallowsadditionaltimetoplaceaninoperableContainmentSprayautomaticinitiationchannelintrip.Thisisconsistentwithallowedoutofservicetimesfortheinstrumentbuses,andisnecessaryduetothedifficultyinplacingachannelintripwhenaninstrumentbusisdeenergized.Thechangeisacceptableduetothelowprobabilityofrequiringautomaticsprayinitiation,andtheavailabilityofmanualinitiation.Notechnicalchange.MinorclarificationtospecifymodeswhenthisSpecificationisapplicable.NewTechnicalSpecificationrequirementsforsafetyrelatedbatterybackedInstrumentBusOperabilityduringcoldshutdown.Therewerepreviouslynorequirements.NewTechnicalSpecificationrequirementsforsafetyrelatedInstrumentBusoperabilityabovecoldshutdown.Therewerepreviouslynorequirements.PreviousactionstatementonlyrequiredachievinganRCStemperaturebelow350'F.ThiswasinconsistentwithSpecification3.7.2.1.a.1whichrequiresoneoffsitesourcetobeoperableabovecoldshutdown.Thenewrequirementismorestringentthanthepreviousrequirement.
%AGE3%73a3+73aCHANGESection3.7.2.2.f.Providesactionstobetakenforsafetyre'atedbatterybackedinstrumentbusesoutofserviceabovecoldshutdown.Section3.7.2.2.g.ProvidesactionstobetakenwhensafetyrelatedInstrumentBusB(dieselgeneratorbacked)isoutofserviceabovecoldshutdownREASONFORCHANGENewTechnicalSpecificationactionrequirementsareconsistentwithStandard,TechnicalSpecificationsfortimeallowedtore-energizethebus.Additionaltimetorestorethebustoitsinverterisallowedifthebusisre-energizedfromasafetyrelatedsupply(dieselgeneratorbacked).Therewerepreviouslynoactionrequirements.NewTechnicalSpecificationactionrequirementsareconsistentwithStandardTechnicalSpecificationsfortimeallowed,tore-energizevitalinstrumentbuses.Thetimeallowedtoreturnthebustoitssafetyrelatedsupplyisconsistentwiththeallowedoutofservicetimeforitsassociatedsafetyrelatedsupply(referenceTechnicalSpecification3.7.2.2.G.1)Therewerepreviouslynoactionrequirements.
PAGE3.7-53.7-63.7-6CHANGEFirstparagraph.Clarifiedthebasisforminimumonsitedieselgeneratorfueloilrequirement:1.addedfullloadrequirement.2.Removed"hotstandby"reference.Firstparagraph.Addedcoldshutdownrequirementofonebatterybackedinstrumentbustothebasissection.Thirdparagraph.Addeddescriptionofthesafetyrelatedinstrumentbusestothebasissection.REASONFORCHANGENotechnicalchange.'ResearchconductedinresponsetoquestionsduringtheGinnaEDSFIindicatedthatthedesignbasisofthefuelstoragetankswastoprovidecapacityforfullloadoperationofbothdieselsfor24hours.DuringtheinitialplantlicensingprocessquestionswereaskedregardinghowthisequatedtoLOCAESFloadingandhotstandbyoperation(ref.FSARSections8.2.3andAppendix8A).Thisresultedinthe40hourdurationforLOCAESFloading(80hoursfor1train)andthe111hourhotstandbyduration.Ginnahasadoptedthe40hourLOCAESFloadingasadesignrequirement.Thehotstandbycomparisonhasneverbeenconsideredadesignrequirementandhasthereforebeendeletedfromreferencehere.AdditionduetonewrequirementsinTechnicalSpecification3.7.1.1.e.Descriptionofsafetyrelatedinstrumentbuseswasaddedtothebasisofsection3.7sincesafety-relatedinstrumentbusesarenowcoveredbythisTechnicalSpecification.Previouslyinstrumentbuseswerenotaddressed.
PAGE4.6-4a4.6-54.6-5aCHANGESection4.6.4.Sectionaddedtoprovidesurveillance.requirementsforsafetyrelatedinstrumentbuses.Addedsixthparagraphtosection4.6basistodescribethebasisofnewinstrumentbussurveillancerequirements.Lastparagraph.Clarifieddieselgeneratoronsitefueloilrequirementbasistobeconsistentwithsection3.7(seechangeI5).REASONFORCHANGENewTechnicalSpecificationsurveillancerequirements.Theserequirementsensureproperalignmentandfunctionalityofthesafetyrelatedinstrumentbuses.ThemethodologyandfrequencyisconsistentwithStandardTechnicalSpecificationrequirementsforvitalinstrumentbuses.ProvidesbasisfornewTechnicalSpecificationsurveillancerequirement4.6.4.seechangeI7.(Page3.7-5,firstparagraph).
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