ML17244A183

Application for Amend to License DPR-18,revising Tech Specs Re Dc Electrical Sys Operation Requirements

ML17244A183
Person / Time
Site:	Ginna
Issue date:	10/10/1978
From:	WHITE L D ROCHESTER GAS & ELECTRIC CORP.
To:
Shared Package
ML17244A182	List: ML17244A181 ML17244A183
References
NUDOCS 7810230256
Download: ML17244A183 (12)

Text

~\UNXTEDSTATESOFAMERICANUCLEARREGULATORY COMMISSION XntheMatterofRochester GasandElectricCorporation (R.E.GinnaNuclearPowerPlant,UnitNo.l)))'I)DocketNo.50-244))APPLICATION FORAMENDMENT TOOPERATING LICENSEPursuanttoSection50.90oftheregulations oftheU.S.NuclearRegulatory Commission (the"Commission"

),Rochester GasandElectricCorporation

("RG&E"),

holderofProvisional Operating LicenseNo.DPR-18,herebyrequeststhattheTechnical Specifica-tion3.7setforthinAppendixAtothatlicensebeamendedtomodifytherequirements foroperability ofthed.c.electrical systems.ITheproposedtechnical specification changeissetforthinAttachment AtothisApplication.

Asafetyevaluation issetforthinAttachment B.Thisevaluation alsodemonstrates thattheproposedchangedoesnotinvolveasignificant changeinthetypesorasignificant increaseintheamountsofeffluents oranychangeintheauthorized powerlevelofthefacility.

Justi--fication forclassification oftheamendment pursuantto10CFRSection170.22isincludedasAttachment C.Acheckfortheappropriate feeaccompanies thisApplication.

WHEREFORE, Applicant respectfully requeststhatAppendixAtoProvisional Operating LicenseNo.DPR-18beamendedintheformattachedheretoasAttachment A.Rochester GasandElectricCorporation ByL.D.Nhie,Jr.VicePresident,

.Electric andSteamProduction Subscribed andsworntobeforemeonthis/O-dayofOctober,1978.SHARONG.CAVALERINOTARYPUBLIC,StateofN.Y.,h'lonroeCountyMyCommfssion ExpiresMarch30,29/.g Attachment AReplaceTechnical Specification pages3.7-1through3.7-4withtherevisedpages3.7-1through3.7-4.

3.7AUXILIARY ELECTRICAL SYSTEMSAplicabilit Appliestotheavailability ofelectrical powerfortheoperation ofplantauxiliaries.

Todefinethoseconditions ofelectrical poweravailability necessary (1)toprovideforsafereactoroperation, and(2)toprovideforthecontinuing availability ofengineered safeguards.

Secification 3.7.1Thereactorshallnotbemaintained criticalwithout:a.The34.5KV-4160Voltstationservicetransformer inservice.b.480-voltbuses14,16,17and18energized.

c.4160-volt buses12Aand12Benergized.

d.Twodieselgenerators operablewithonsitesupplyof10,000gallonsoffuelavailable.

e.Bothbatteries andbothd.c.systemsoperable, andratleastone150ampbatterycharger-or two75ampbatterychargersinserviceforeachbattery.3.7.2Duringreactoroperation therequirement of3.7.1maybemodifiedasfollows:3~71 a.Poweroperation maycontinuewith'thestationservicetransformer outofserviceprovided(a)thefailureshallbereportedtoNRCwithin24hourswithanoutlineoftheplansforpromptrestoration ofoffsitepowerandthe.additional precautions tobetakenwhilethetransformer Wisoutofserviceand(b)bothdiesel.generators areoperable.

Underconditions offulfillment of(b)andnon-fulfillment of(a),continued poweroperation shallnotextendbeyond24hours.Non-fulfillment of(b)shallbeide'emedsufficient causeforimmediate reactorshutdown.

b.Poweroperation maycontinueifonedieselgenerator isoutofserviceprovided(a)theremaining dieselgenerator isruncontinuously, and(b)thestationservicetrans-formerisinserviceand(c)suchoperation isnotinexcessof7day(totalforbothdiesels)duringanymonth.c.Poweroperation maycontinueifthebatterycharger(s) forloned.c.systemareinoperable, aslongastheinoperable batterychargersarerestoredtooperablestatuswithintwohours.Ifnotrestored, thereactorshallbeplaced;:inthehotshutdowncondition withinthenextsixhoursandinthecoldshutdowncondition withinthefollowing 30hours..Basis:'i(Theelectrical syst'mequipment isarrangedsothatnosinglecontingency caninactivate enoughsafeguards equipment tojeopardize theplantsafety.The480-voltequipment isarranged3~72 on6buses.The4160-volt equipment, alsoissuppliedfrom4buses.Twoseparateoutsidesourcessupplystationservicepowertotheplant.Theplantauxiliary isarrangedelectrically sothatmul-tipleitemsreceivetheirpowerfromthetwodifferent sources.Thechargingpumpsaresuppliedfromthe480-voltbusesNo.14and16.Thefourcontainment fansaredividedbetween480-voltbusesNo.14and16.Thetworesidualheatpumpsareonseparate480-voltbuses.motorcontrolcenters.ValvesaresuppliedfromIOneoutsidesourceofpowerisrequiredtogivesufficient powertorunnormaloperating equipment.

Onetransmission linecansupplyalltheplantauxiliary power.The115-34.5kvstationservicetransformer cansupplyalltheauxiliary loads.Thebusarrangements specified foroperation ensurethatpowerisavailable toanadequatenumberofsafeguards auxiliaries.

Withadditional switching, moreequipment couldbeoutofservicewithoutinfringing onsafety.Twodieselgenerators havesufficient capacitytostartandrunatdesignloadalltheengineered safeguards equipment.

TheS/safeguards operatedfromonedieselgenerator canadequately lCcoolthecoreforanyloss-of-coolant

incident, andtheyalso3~73 maintainthecontainment pressurewithinthedesignvalue.Theminimumdieselfueloilinventory atalltimesismaintained toassuretheoperation ofbothdieselscarryingdesignloadofalltheengineered safeguards equipment foratleast40hours.-Commercial oilsuppliesandtruckingfacilities existtoassuredeliveries within8hours.Atleastone150ampbatterychargerortwo75ampbatterychargersshallbein.serviceforeachbatterysothatthebatteries willtalwaysbeatfullcharge.Thisensuresthatadequatedcpowerwillbeavailable.

Theplantcanbesafelyshutdownwithouttheuseofoffsitepowersinceallvitalloads(sa'fetysystems,instruments etc.)canbesuppliedfromtheemergency dieselgenerators.

Thetwodieselgenerators, eachcapableofsupplying safeguards loads,andthestationauxiliary transformer providethreeseparatesourcesofpowersupplysystemmeetsthesinglefailurecriteriarequiredofsafetysystems.(2)\Refernces:

(1)FSAR-(2)FSAR-Section-8.2.1 Appendix8Asjpl3.7-4 Attachment.

BTechnical Specification 3.7.1epresently requiresthatonlyonebatterycharger(whichhasa150ampcapacity) needstobeoperablewhilethereactoriscritical.

Thetotalnormald.c.loadispresently about170amps.Twoadditional batterychargers, eachwitha75ampchargingcapacity, havebeeninstalled.

Withallbatterychargersoperational andintheirnormalconfiguration, thereisatotalbatterychargercapacityof225ampsperbattery.Intheeventeitherofthe150ampbatterychargersbecomesinoperable, manualtransferofone75ampbatterychargerwillresultinabatterychargercapacitytoeachbatteryof150amps.Thisconfiguration andcapacityisconsistent.

withtheguidanceprovidedinRegulatory Guides1.6and1.32.Regulatory Guide1.6,Rev.0,positionD.3,statesthat"eachd.c.loadgroupshouldbeenergized byabatteryandbatterycharger.Thebattery-chargercombination shouldhavenoautomatic connection toanyotherredundant d.c.loadgroup."Thisguidanceissatisfied byhavingonlymanualconnection betweend.c.loadgroups.Regulatory

~P'Guide1.32,Rev.2,SectionC.l.b,statesthat"...thecapacityofthebatterychargersupplyshouldbebasedonthelargestcombined+emandsofthevarioussteadystatesloadsandthechargingcapacitytorestorethebatteryfromthedesignminimumchargestatetothefullychargedstate,irrespective ofthestatusoftheplantduringwhichthesedemandsoccur."

'Thenormalcontinuous loadoneachd.c.systemisapproxi-mately85amps.TheshutdownloadsthatarerequiredintheeventofalossofoffsitepowerarelistedinFSARTable8.2-.2.Theonlysteadystate(8hour)loadlisted,otherthanthein-verter,whichoperatebothduringnormaloperation andforsafeplantshutdown, istheTurbine-Driven Auxiliary Feedwater PumpDCOilPump.Thispumprepresents anadditional potential 22amploadonBattery1B.Thelargestpossiblecombinedload-couldthusoccurduringaplantshutdownfollowing lossofoffsitepower,whenallnormalloadcontinued operating, andtheturbine-drivenauxiliary feedwater pumpwasalsoengaged.Thiscombinedloadof85ampsplus22amps,foratotalof107amps,ismuch'-lowerthanthecapacityofthe150ampbatterychargers.

Itistherefore apparentthatthebatterychargersizingcriteriaofRegulatory Guide1.3.2,andIEEE308-1974, Section5.3.4areeasilymet.Ifthebatterychargerforoned.c.systemwerefoundtobeinoperable, itwouldbepossibleinmostcasestoeffectrepairsandrestorethesystemtooperability withinarelatively shortrtime.Thisconfiguration wouldnotnegatetheabilityofthed.c.Isystemtoperformitsfunction, butitwouldreducetheredundancy providedinthereactordesi.'gn, andtherebylimittheabilitytotolerateadditional equipment failures.

(Although it'should benotedthatthebatteries bythemselves couldcarryallshutdownlloadsfor-8hours).Theredundant d.c.systemwouldbethoroughly checkedtoensureitsoperability.

Ifitdeveloped thatthe

~~~inoperable d.c.systemcouldnotbemadeoperablewithintwohours,thereactorwouldbeplacedinthehotshutdowncondition, toprovideforreduction ofdecayheatfromthefuel.Ifafteranothersixhoursthemalfunction werenotcorrected, thereactorwouldbeplacedinacoldshutdowncondition within30hours,usingnormalshutdownandcooldownprocedures.

Thesetimeperiodsareconsistent withtheguidanceprovidedinRegulatory Guide1.93,Rev.0,"Availability ofElectricPowerSources",

Regulatory Position5.rP'

~~IAtt'achme'nt C.TheproposedAmendment totheProvisional Operating Licensehasbeenevaluated anddetermined tofallwithinthedefinition ofClassIIIof10CFRSection170.22therebyrequiring afeeof$4,000.Theproposedamendment simplyclarifies asinglesafetyissue,batterychargercapacity.

Theissuehasbeenclearlyidentified byNRCregulatory guides.C P~t