ML17261A778

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Proposed Tech Specs Incorporating Test Exception to Containment Spray Pump Operability Requirements
ML17261A778
Person / Time
Site: Ginna Constellation icon.png
Issue date: 01/20/1988
From:
ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17261A775 List:
References
NUDOCS 8801260416
Download: ML17261A778 (12)


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AttachmentARevisetheTechnicalSpecificationpagesasfollows:Removepages3.3-6through3.3-8Insert3.3-6through3.3-8~80126P41~<Q01PP----ADO<K05ppop4PPD I~,iI~C1, b.cd.e.Onecontainmentspraypumpmaybeinoperableprovidedthepumpisrestoredtooperablestatuswithin3days.Duringdieselgeneratorloadandsafeguardsequencetesting,bothcontainment,spraypumpsmaybeinoperableforaperiodnottoexceedonehourprovidedtheRCStemperatureislessthan350'F.Anyvalveorpipinginasystem,requiredtofunctionduringaccidentconditions,maybeinoperableprovideditisrestoredtooperablestatuswithin72hours.Onepostaccidentcharcoalfilterunitand/oritsassociatedfancoolermaybeinoperableprovidedtheunitisrestoredtooperablestatuswithin7days.Thesprayadditivesystemmaybeinoperableforaperiodofnomorethan3daysprovidedthatbothcharcoalfilterunitsareoperable.3-3'ComonentCoolinSstem3.3.3.1Thereactorshallnotbetakenabovecoldshutdownunlessthefollowingconditionsaremet:a~b.cBothcomponentcoolingpumpsareoperable.Bothcomponentcoolingheatexchangersareoperable.Allvalves,interlocksandpipingassociatedwiththeabovecomponentswhicharerequired3.3-6AmendmentNo.,Prop'osed.

I1'T tofunctionduringaccidentconditionsareoperable.3.3.3.2Therequirementsof3.3.3.1maybemodifiedtoallowoneofthefollowingcomponentstobeinoperableatanyonetime.Ifthesystemisnotrestoredtomeettheconditionsof3.3.3.1withinthetimeperiodspecified,thereactorshallbeinhotshutdownwithinthenext6hours.Iftherequirementsof3.3.3.1arenotsatisfiedwithinanadditional48hours,thereactorshallbeinthecoldshutdownconditionwithinthefollowing30hours.Ifneithercomponentcoolingwaterloopisoperable,thereactorshallbemaintainedbelowareactorcoolantsystemtemperatureof350Finsteadofatcoldshutdownandcorrectiveactionshallbeinitiatedtorestoreacomponentcoolingwaterlooptooperablestatusassoonaspossible.a~b.Onecomponentcoolingpumpmaybeoutofserviceprovidedthepumpisrestoredtooperablestatuswithin24hours.Oneheatexchangerorotherpassivecomponentmaybeout,ofserviceprovidedthesystemmaystilloperateat100%capacityandrepairsarecompletedwithin24hours.3A37Amendment,No.Proposed E

3.3.43.3.4.1ServiceWaterSstemThereactorshall=notbetakenabovecoldshutdownunlessthefollowingconditionsaremet:3.3.4.23.3.53.3.5.13.3.5.2a.Atleasttwoservicewaterpumps,oneonbus17andoneonbus18,andoneloopheaderareoperable.b.Allvalves,interlocks,andpipingassociatedwiththeoperationoftwopumpsareoperable.Anytimethat.theconditionsof3.3.4.1abovecannotbemet,thereactorshallbeplacedinhotshutdownwithin6hoursand,incoldshutdownwithinanadditional30hours.ControlRoomEmerencAirTreatmentSstemTheRCStemperatureshallnotbeatorabove350'Funlessthecontrolroomemergencyairtreatmentsystemisoperable.Therequirementsof3.3.5.1maybemodifiedtoallowthecontrolroomemergencyairtreatmentsystemtobeinoperableforaperiod.of48hours.Ifthesystemisnotmadeoperablewithinthose48hours,the.reactorshallbeplacedinhotshutdownwithinthenext6hoursandtheRCStemperaturelessthan350'Finanadditional12hours.BasisThenormalprocedureforstartingthereactoris,firsttoheat3.3-8AmendmentNo.Proposed AttachmentBAmendment,No.24totheTechnicalSpecificationchangedtheRCSconditionsabovewhichthecontainmentspraypumpswererequiredtobeoperablefromcriticaltocoldshutdown.ThisrequirementwillnolongerallowthecurrentPlantpracticeofperformingtheemergencydieselgeneratorloadandsafeguardssequencetesting(GinnaProcedureRSSP2.2)whenRCStemperatureisatapproximately300'F.Thistestisperformedwithonespraypumpalignedforrecirculationandtheotherinpull-stop.Therefore,neitherpumpwouldbeabletorespondtoanautomaticactuationsignalalthoughthepumpinpull-stopcouldbemanuallyactuatedimmediatelyandtheotherpumpcouldberealignedwithinarelativelybriefperiodoftime.Thecontainmentspraysystem,inconjunctionwiththecontain-ment.fancoolers,isdesignedtoremovesufficientheatfromthecontainmentatmospherefollowinganaccidenttomaintainthecontainment.pressurebelowitsdesignlimit(60psig).Thecontainmentspraysystemisalsocapableofreducingtheiodineandparticulatefissionproductinventoriesinthecontainmentatmosph'eresuchthatoffsitedosesresultingfromaLOCAarewithintheguidelinevaluesof10CFR100.TheproposedchangetotheTechnicalSpecificationswouldallowbothspraypumpstobeinoperableforaperiodnot.toexceed1hourprovidedRCStemperatureislessthan350'F.Thedesignbasiseventsforacontainmentpressuretransient.aretheLOCAat100percentpowerormainsteamlinebreak(MSLB)occurringatzeropercentreactorthermalpower.RestrictingRCStemperaturetolessthan350'Flimitstheamount.ofenergyavailablefortransfertothecontainmentatmosphereshouldaprimarysystempiperuptureorMSLBoccur.Forexample,acomparisonofreactorcoolantspecific"enthalpiesyields559.8BTU/ibmat560Fand2200psiaversus322.5BTU/ibmat350Fand600psia.InadditionenergyfromthefuelthatwouldbetransferredtotheRCSduringblowdownfollowingapiperuptureat100percentpower,wouldnotbeavailableattheisothermal350'Fcondition.Therefore,thepeakcontainmentpressureshouldremainwellbelowthedesignlimitof60psig.ThepotentialforoffsitedoseconsequencesforLOCAoccurringat350Fwithoutcontainmentspraypumpsimmediatelyoperable,tobeequaltoorgreaterthanthoseconsequencesresultingfromaLOCAat100%powerwithcontainmentsprayavailable,islimited.The350'Fisothermalconditionofthefuelreducesthepotentialforcladdingdamageandreleaseoffissionproducts.Thelowercontainmentpressurereducesthedrivingforceforleakageofanyfissionproductsreleasedintothecontainment,atmospheretotheoutsideenvironment..Finally,althoughthespraypumpsaretechnicallyconsideredinoperablebecausetheycannotbeautomati-callyactuated,theycanbemanuallyactuatedorrealignedwithinabriefperiodoftime.

Thisproposedamendmenthasbeenreviewedagainstthethreefactorsof10CFR50.92.Ithasbeendeterminedthattheamendmentdoesnotinvolveasignificanthazardsconsiderationforthefollowingreasons.Thischangewillnotresultinasignificantincreaseintheprobabilityorconsequencesofanaccidentpreviouslyevaluated.Theproposedchangeinvolvestheinsertionofatestexceptionintotheoperabilityrequirementsforthecontainmentspraypumps.ThischangedoesnotinvolveaphysicalmodificationofthePlantorequipment.TheprobabilityofoccurrenceoftheaccidentsaddressedintheUFSARcannotbeaffected.ThecontainmentspraysystemisdesignedtoremoveheatfromthecontainmentatmospherefollowingapostulatedLOCA,mainsteamlinebreak(MSLB)oranyeventwherelargeamountsofenergytransferredtocontainmentcouldcauseoverpressurization.Theproposedtestexceptionminimizesthetimethatbothspraypumpswouldbetechnicallyinoperable,andplacesalimitonRCSconditionssuchthattheenergyavailablefortransfertothecontainmentatmosphereisalsolimited.Thetimeallowedtoconductthetest(1hr)isshort.LicensedOperatorswillbeoverseeingthetestingandwillbealerttothecontainmentsprayconfiguration.Theprobabilityofanaccidentoccuring,duringthistimeperiod,islessthan1.2x10oftheannualfrequencyofoccuranceofthedesignbasisevent.Therefore,theconsequencesofanaccidentpreviouslyevaluated(LOCA,MSLB)arenotsignificantlyincreasedintermsofthepotentialforcontainmentdesignpressuretobeexceeded.Theoffsitedoseconsequencesduetotheunavailabilityofcontainmentspraywouldnotbeincreased.Thepotentialforfuelfailureandreleaseoffissionproductsfromthecladdingissignificantlyreducedduetothelowtemperature(350'F)initialconditionofthefuelatthetimeofthepostulatedLOCA.Thelowercontainmentpressurereducesthepotentialforcontainmentleakage.Alsomanualrealignmentofaspraypumpwouldoccurinsufficienttimetoprovidesignificantfissionproductremovalcapability.2.Thesechangeswillnotcreatethepossibilityofanewordifferentkindofaccidentpreviouslyevaluated.AsindicatedabovetheproposedchangetotheTechnicalSpecificationsdoesnotinvolveaphysicalmodificationtothePlantthatcouldresultinthecreationofanaccidentnotpreviouslyanalyzed.3.Thischangedoesnotinvolveasignificantreductioninthemarginsofsafety.

Therearenosignificantreductionsinthemarginsofsafety.ThecontainmentspraysystemisdesignedtoprovideheatremovalandremovaloffissionproductsfromthecontainmentatmospherefollowingaLOCA.Duetothereasonsdiscussedabove,thecontainmentpressureandradiologicalconsequencesofaLOCAoccurringatanRCSconditionoflessthan350Fandnospraysystempumpsavailablewouldbemuchlessthanthedesignbasisaccidentcondition.Thereforethemarginsofsafetytocontainmentfailureanddoselimitsof10CFR100wouldnotbereduced.

LISTOFCHANGESTOTECHNICALSPECIFICATIONSLocationofChanep.3.3-6,Section3.3.2.2bAddedphrase"Duringdieselgeneratorloadandsafeguardsequencetesting,bothcontainmentspraypumpsmaybeinoperableforaperiodnottoexceedonehourprovidedtheRCStemperatureislessthan350Fp.3.3-7,3.3-8Nochangestothesepages.Pagesretypedonly.