ML17228A901
| ML17228A901 | |
| Person / Time | |
|---|---|
| Site: | Saint Lucie  |
| Issue date: | 11/02/1994 |
| From: | SAGER D A FLORIDA POWER & LIGHT CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| Shared Package | |
| ML17228A902 | List: |
| References | |
| L-94-260, NUDOCS 9411080181 | |
| Download: ML17228A901 (21) | |
Text
ACCELERATED RIDSPROCESSING)
REGULATORY INFORMATION DISTRXBUTXON SYSTEM(RXDS)ACCESSION NBR:9411080181 DOC~DATE:94/11/02NOTARIZED:
YESFACIL:50-335 St.LuciePlant,Unit1,FloridaPower&Light,Co.50-389St.LuciePlant,Unit2,FloridaPower&LightCo.AUTH.NAMEAUTHORAFFXLIATXON SAGER,D.A.
FloridaPower&LightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)DOCKET0500033505000389
SUBJECT:
Application foramendstolicensesDPR-67&NPF-16,upgrading TS3/4.6.2.1
&3/4.6.2.3 byadaptingcombinedspecforcontainment spray&coolingsyscontained instdTSforC-Eplants.DISTRIBUTION CODE:AOOIDCOPIESRECEIVED:LTR iENCL3SIZE:/TITLE:ORSubmittal:
GeneralDistribution NOTES:RECIPIENT IDCODE/NAME PD2-2LANORRXS,JINTERNAL:
ACRSNRR/DE/EELB NRR/DRPWNRR/DSSA/SRXB OGC/HDS3EXTERNAL:
NOACCOPIESLTTRENCL1111661111111011RECIPIENT IDCODE/NAME PD2-2PDILECENTE~NRRDCH/HICBNRR/DSSA/SPLBNUDOCS-ABSTRACT NRCPDRCOPIESLTTRENCL111111111111NOTETOALL"RIDS"RECIPIENTS:
PLEASEHELPUSTOREDUCEiVKSTE!CONTACT'I'HE DOCL'i!ENT CONTROLDESK,ROOMPl-37(EXT.504-0083)ToELI%)IRATEYOURiAiIErRoiID!srR!oU'I'IoNLIs'rsI:oRDoc!.'@EN I'sYo!.'oN"!'!
LD!TOTALNUMBEROFCOPIESREQUIRED:
LTTR19ENCL18 0
FloridaPower&LightCompany,P.O.Box12S,FortPierce,FL34S54-0128 November2,1994L-94-26010CFR'0.90U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555RE:St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment Sraand.CoolinSstemsPursuantto10CFR50.90,FloridaPower&LightCompany(FPL)requeststoamendFacilityOperating LicensesDPR-67andNPF-16forSt.LucieUnit,1andUnit2,respectively, byincorporating theattachedTechnical Specifications (TS)revisions.
Theproposedamendments will.upgradeexistingTS3/4.6.2.1 andTS3/4.6.2.3 byadaptingthecombinedspecification forContainment SprayandCoolingSystems,contained intheStandardTechnical Specifications forCombustion Engineering Plants,totheSt.Lucieunits.Thechangesaccountforplantspecificdifferences andincludeallrelatedrequirements ofNUREG-1432, Rev.0,specification 3.6.6A.Accordingly, theproposalisconsistent withtheCommission's FinalPolicyStatement onTechnical Specifications Improvements (58FR39132).Itisrequested thattheproposedamendments, ifapproved, be,issuedbyJanuary31,1995.Attachment 1isanevaluation oftheproposedchanges.Attachment 2isthe"Determination ofNoSignificant HazardsConsideration."
Attachments 3and4containcopiesoftheappropriate technical specifications pagesmarkeduptoshowtheproposedchanges.Theproposedamendments havebeenreviewedbytheSt.LucieFacilityReviewGroupandtheFPLCompanyNuclearReviewBoard.Inaccordance with10CFR50.91(b)(1),copiesoftheproposedamendments arebeingforwarded totheStateDesigneefortheStateofFlorida.Pleasecontactusifthereareanyquestions aboutthissubmittal.
Verytrulyyours,oD.A.gerVicersidentSt.c'ePlant901l080KB1941102PDRADQCK05000335PDRanFPLGroupcompanYy0'I 4'I St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Page2DAS/RLDAttachments cc:StewartD.Ebneter,RegionalAdministrator, RegionII,USNRC.SeniorResidentInspector, USNRC,St.LuciePlant.Mr.W.A.Passetti, FloridaDepartment ofHealthandRehabilitative Services.
y,(14,lI~>l~',i-:~f<t'I St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment, SraandCoolinSstemsL-94-260Page3STATEOFFLORIDA))COUNTYOFSTLUCIESS~D.A.Sagerbeingfirstdulysworn,deposesandsays:ThatheisVicePresident, St.LuciePlantfortheNuclearDivisionofFloridaPower&LightCompany,theLicenseehereinrThathehasexecutedtheforegoing document; thatthestatements madeinthisdocumentaretrueandcorrecttothebestofhisknowledge, information andbelief,andthatheisauthorized toexecutethedocumentonbehalfofsaidLicensee.
D.A.erSTATEOFFLORIDACOUNTYOFSC,IveilTheforegoing instrument.
wasacknowledged beforemethis~dayofNo<fccsfa, 19l4byD.A.Sager,whoispersonally knowntomeandwhodidtakeanoath.NameofNotaryPublicMyCommission expiresR~klLl5l598Commission No.<<348989Ogglllll/lylll ega+e*eOeg'lllllllmliloo St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsATTACHMENT 1EVALUATION OFPROPOSEDTSCHANGES St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 1Page1of8EVALUATION OFPROPOSEDTSCHANGESIntroduction FloridaPowerandLightCompany(FPL)requeststhatAppendixAofFacilityOperating LicenseDPR-67forSt.LucieUnit1(PSL1)andNPF-16forSt.LucieUnit2(PSL2)bechangedtoupgradeTechnical Specifications (TS)3/4.6.2.1 and3/4.6.2.3.
Thespecifications applytotheContainment SprayandContainment CoolingSystems,respectively.
Thisline-item improvement willclarifytheactionsrequiredforinoperable equipment associated withthedepressurization andcoolingsystemsinstalled inthereactorcontainment
- building, andwillprovideconsistency ofoperations betweenPSL1andPSL2.TheproposedchangeswillcombineTS3/4.6.2.1 and3/4.6.2.3 intoasingleLimitingCondition forOperation (LCO)similartospecification 3.6.6AoftheStandardTechnical Specifications (STS)forCombustion Engineering Plants(NUREG-1432, Rev.0).TheproposedLCO,accounting forplantspecificdifferences, includesallrelatedNUREG-1432 requirements.
Accordingly, theproposalisconsistent withtheCommission's FinalPolicyStatement onTechnical Specifications Improvements (58FR39132).PSL1andPSL2ProosedTechnical Secification ChanesINDEXPaeVIPSL1andPaeVIIPSL2:Thetitle"Containment SpraySystem"willberevisedtoread,"Containment SprayandCoolingSystems."
Thetitle"Containment CoolingSystem"anditsreference pagewillbedeleted.TS34.6.2.1Containment SraSstem:TheexistingLCOrequirestwoindependent containment spraysystemstobeOPERABLEinMODES1and2,andinMODE3whenpressurizer pressureis>1750psia.ThewordingforthisLCOandtheassociated ACTIONstatement(s) foraninoperable spraytrainwillbereplacedintheirentiretypursuant.
tothebasesandguidanceprovidedinNUREG-1432, specification 3.6.6A,CONTAINMENT SPRAYANDCOOLINGSYSTEMS.TheNUREG-1432 tabulararrangement ofconditions, requiredactions,andactioncompletion timeswillberestructured intothenarrative formconsistent withthePSL1andPSL2TSformat.
~~St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 1Page2of8Theexistingsurveillance reuirements fortheContainment SpraySystemwillnotbealtered.However,theproposedspecification willincorporate thesurveillances requiredfortheContainment CoolingSystem.Thefootnote"*",whichprovidesanexplanation ofMODE3APPLICABILITY, willbedeleted.TheproposedLCOhasbeenstructured suchthatthefootnotewillnotbenecessary.
TS34.6.2.3Containment CoolinSstem:Thisspecification willbedeletedinitsentirety.
BasesaesB346-2andB346-3:Basessection3/4.6.2.1 willberevisedtoreflectthebasesfortheproposedspecification.
Basessection3/4.6.2.3 willbedeleted.Theapplicable TSpageshavebeenmarked-up toshowtheproposedchanges,andareprovidedinAttachments 3and4tothissubmittal.
BackroundThefunctionoftheContainment Spray(CS)Systemistoprovidecontainment heat,removalandiodineremovalduringaccidentconditions.
Itaccomplishes itsfunctionthroughtheuseoftworedundant spraytrainswhicharecapableoftakingsuctionfromtheRefueling WaterTank(RWT)onaContainment SprayActuation Signal(CSAS),automatically transferring suctiontothecontainment sumponaRecirculation Actuation Signal(RAS),andtransferring heattotheultimateheatsinkviathecomponent coolingwater(CCW)andintakecoolingwater(ICW)systems.Eachtrainconsistsofaspraypump,shutdowncoolingheatexchanger, piping,valves,andsprayheader;andiscapableofsatisfying atleast504ofaccidentheatremovalrequirements.
OnetrainoftheCSsystem,inconjunction withitsSprayAdditive/Iodine RemovalSystem,cansatisfypost-accidentiodineremovalrequirements.
Intheeventoffsitepowerislost,eachtrainispoweredbyanemergency dieselgenerator.
ThefunctionoftheContainment CoolingSystemistoprovidecontainment heatremovalduringbothnormaloperation andaccidentconditions.
Itaccomplishes itsfunctionthroughtheuseoftwoelectrically andmechanically independent containment cooling 1"lIIt St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL94260Attachment 1Page3of8trains.Fourfancoolers,twopertrain,transferheattotheultimateheatsinkviatheCCWandICWsystems.Eachtrainiscapableofsatisfying atleast50%ofaccidentheatremovalrequirements, andeachtrainispoweredbyanemergency dieselgenerator intheeventoffsitepowerislost.Eachfaniscapableofauto-start onaSafetyInjection Actuation Signal(SIAS).PSL1andPSL2eachhaveaplantspecificLCO(TS3.6.1.5)whichprovidesassurance thattheaveragecontainment temperature willbemaintained
<120'Fforthepurposeofpreserving thevalidityofaccidentanalysesassumptions, environmental qualification ofequipment locatedinsidecontainment, andassumptions madeforstressanalysesofreactorvesselsupports.
EachPSLunitalsohasaplantspecificLCOfortheSprayAdditive/Iodine RemovalSystem(TS3.6.2.2)toensurethatsufficient additives areavailable forinjection intothecontainment spray.Evaluation oftheChanesProosedforPSL1andPSL2LCO:Thecontainment analysesforPSL1andPSL2demonstrate thattheremovalofdesignbasisaccident(DBA)heatloadscanbeaccomplished byatleastonetrainofthecontainment spraysysteminconjunction withonetrainofthecontainment coolingsystem;andthatrequirements foriodineremovalfromthecontainment atmosphere canbesatisfied byasingleCStrain.TheproposedLCOrequirestwocontainment spraytrainsandtwocontainment coolingtrainstobeOPERABLE.
Therefore, intheeventofanaccidentandconsidering singlefailurecriteria, theheatandiodineremovalrequirements willbesatisfied.
ThewordingoftheproposedLCOisthesameastheSTS.APPLICABILITY:
TheproposedAPPLICABILITY fortheCSSystemisthesameasexistingLCO3.6.2.1,e.g.,MODES1and2,andMODE3withpressurizer pressure~1750psia.Itisnotedthatthepressurecriterion specified forMODE3operation isaplantspecificdifference fromthegenericSTS.FPLdesirestoretainthispreviously approvedstipulation since,duringshutdownandcooldownofthereactorcoolantsystem(RCS),theCSsystemmustberemovedfromserviceduringthepreparations necessary forshutdowncoolingoperations.
St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 1Page4of8FPLhasevaluated thePSL1andPSL2containment pressureandtemperature responsetothelimitinglossofcoolant(LOCA)andmainsteamlinebreak(MSLB)accidents duringMODE3conditions.
Theresultsofthisevaluation confirmthat,withpressurizer pressure<1750psia,containment designpressureandtemperature willnotbeexceededwhentwocontainment fancoolersareoperable(bothCStrainswereassumedtobeoutofservice).
TheproposedLCOrequirestwotrains(twofancoolerspertrain)ofcontainment coolingtobeOPERABLEthroughout theentireMODE3rangeofoperation.
Therefore, retaining thepreviously
- approved, pressuredependent MODE3applicability fortheCSSystemwillaffordamoreefficient andtimelytransition toShutdownCoolingSystemoperation withoutlossofanacceptable abilitytomitigatethepostulated accidents.
Inaddition, agreement withtheapplicability ofrelatedLCO3.6.2.2(SprayAdditive/Iodine RemovalSystem)willbepreserved.
TheproposedAPPLICABILITY fortheContainment CoolingSystemisthesameasexistingLCO3.6.2.3,e.g.,MODES1,2,and3.Toverifythatlowermodeapplicability shouldnotberequired; FPLhasevaluated thePSL1andPSL2containment pressureandtemperature responsetothelimitingLOCAandMSLBaccidents foroperations withtheRCStemperature at360'F.Theresultsofthisevaluation confirmthatthecontainment designpressureandtemperature willnotbeexceededwithbothCStrainsandallfourfancoolersoutofservice.Operational MODES4,5and6occuratRCStemperatures below3254F,andtheimpactoncontainment parameters frompotential accidents willbefurtherreducedintheselowermodes.Therefore, FPLconsiders theproposedAPPLICABILITY fortheContainment CoolingSystemtobeacceptable, andtobeconsistent withtheSTS.ACTION-i.a:
WithoneCStraininoperable, proposedACTION-1.a requirestheinoperable traintoberestoredtoOPERABLEstatuswithin72hoursandwithin10daysofinitialdiscovery offailuretomeettheLCO.Inthiscondition, theremaining OPERABLEsprayandcoolingtrainsarecapableofproviding theiodineremovalfunctionandatleast100%ofaccidentheatloadremoval.The72hourcompletion timetakesintoaccounttheredundant heatandiodineremovalcapability affordedbytheContainment SpraySystem,reasonable timeforrepairs,andthelowprobability ofaDBAoccurring duringthisperiod.The10days(frominitialdiscovery St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 1Page5of8offailuretomeettheLCO)portionofthecompletion timeisbasedonengineering judgement, andclarifies thatfailuretocompletely satisfytheLCOforanexcessive intervalisnotpermitted.
Ittakesintoaccountthelowprobability ofcoincident entryintotwoconditions inthisspecification (definedinproposedACTION-1.c) coupledwiththelowprobability ofanaccidentoccurring duringthistime.Theproposedcondition, requiredaction,completion times,andtheirbasesareequivalent toAction"A"ofSTSLCO3.6.6A.Iftheinoperable spraytraincannotberestoredtoOPERABLEstatuswithintherequiredcompletion time,proposedACTION-1.a requirestheplanttobeinMODE3withinthenext6hoursandinMODE4withinthefollowing 54hours.TheproposedactionwillbringtheplanttoaMODEinwhichtheLCOdoesnotapply.The6hourcompletion timeisreasonable, basedonoperating experience, toreachMODE3fromfullpowerconditions inanorderlymanner,andwithoutchallenging plantsystems;anditisconsistent withPSL1andPSL2TS3.0.3.TheextendedintervaltoreachMODE4includesadditional time(48hours)forrestoration oftheCStrain,beyondthe6hourstypically allottedbyTS3.0.3toenterthismode.Thisisreasonable whenconsidering thatthedrivingforceforareleaseofradioactive materialfromtheRCSisreducedinMODE3.Theproposedcondition, requiredaction,completion times,andtheirbasesareequivalent toAction"B"ofSTSLCO3.6.6A.ACTION-1.b:
Withonecontainment coolingtraininoperable, proposedACTION-1.b requirestheinoperable traintoberestoredtoOPERABLEstatuswithin7days,andwithin10daysfrominitialdiscovery offailuretomeettheLCO.Inthiscondition, theremaining OPERABLEsprayandcoolingsystemcomponents arecapableofproviding theiodineremovalfunctionandatleast1004oftheheatremovalneedsafteranaccident.
The7daycompletion timetakesintoaccounttheredundant heatremovalcapabilities affordedbythecombinations oftheCSSystemandtheContainment CoolingSystem,andthelowprobability ofaDBAoccurring duringthisperiod.The10days(frominitialdiscovery offailuretomeettheLCO)portionofthecompletion timeisbasedonengineering judgement, andclarifies that,failuretocompletely satisfytheLCOforanexcessive intervalisnotpermitted.
Ittakesintoaccountthelowprobability ofcoincident entryintotwoconditions inthisspecification (definedinproposedACTION-1.c),
coupledwiththe St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 1Page6of8lowprobability ofanaccidentoccurring duringthistime.Theproposedcondition, requiredaction,completion times,andtheirbasesareequivalent toAction"C"ofSTSLCO3.6.6A.Iftheinoperable containment coolingtraincannotberestoredtoOPERABLEstatuswithintherequiredcompletion time,proposedACTION-1.b requirestheplanttobeinMODE3withinthenext6hoursandinMODE4withinthefollowing 6hours.TheproposedactionwillbringtheplanttoaMODEinwhichtheLCOdoesnotapply.Theallowedcompletion timesarereasonable, basedonoperating experience, toreachtherequiredplantconditions fromfullpowerconditions inanorderlymannerandwithoutchallenging plantsystems.Theproposedcondition, requiredaction,completion times,andtheirbasesareequivalent toAction"F"ofSTSLCO3.6.6A;andareconsistent withPSL1andPSL2TS3.0.3.ACTION-1.c:
WithoneCStrainandonecontainment coolingtraininoperable, proposedACTION-1.c allowsconcurrent entryintoACTION-l.a andACTION-l.b; andallowstheactioncompletion intervals tobetrackedseparately, startingfromthetimethateachtrainwasdiscovered inoperable.
Theremaining OPERABLEsprayandcontainment coolingsystemcomponents arecapableofproviding theiodineremovalfunctionand1004ofaccidentheatloadremoval.Considering thenarrative formatandexistingstructure ofthePSL1andPSL2technical specifications, thisactionstatement providesclarification thatentryintobothACTIONS-1.a and1.bwithinthisLCOispermissible, andspecifies howeachactioncompletion intervalwillbetracked.ProposedACTION-l.c isconsistent withPart1.3,"Completion Times",oftheSTS"USEANDAPPLICATION" section.ACTION-i.d:
Withtwocontainment coolingtrainsinoperable, proposedACTION-1.d requiresatleastonecoolingtraintoberestoredtoOPERABLEstatuswithin72hours.Inthiscondition, theOPERABLEspraytrainsarecapableofproviding theiodineremovalfunctionandtheheatremovalneedsafteranaccident.
FPLhasevaluated this,condition forthelimitingLOCAandMSLBaccidents postulated forthePSLlandPSL2containment
- analyses, andhasconfirmed thattwoCStrainsarecapableofsatisfying 1004oftheaccidentheatremovalrequirements.
The72hourcompletion timetakesintoaccounttheredundant heatremovalcapabilities affordedbytheCSSystem,andthelowprobability ofaDBA
~F St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 1Page7of8occurring duringthisperiod.Theproposedcondition, requiredaction,completion time,andtheirbasesareequivalent toACTION"D"ofSTSLCO3.6.6A.Ifatleastoneinoperable containment coolingtraincannotberestoredtoOPERABLEstatuswithintherequiredcompletion time,proposedACTION-l.d requirestheplanttobeinMODE3withinthenext6hoursandinMODE4withinthefollowing 6hours.TheproposedactionwillbringtheplanttoaMODEinwhichtheLCOdoesnotapply.Theallowedcompletion timesarereasonable, basedonoperating experience, toreachtherequiredplantconditions fromfullpowerconditions inanorderlymannerandwithoutchallenging plantsystems.Theproposedcondition, requiredaction,completion times,andtheirbasesareequivalent toAction"F"ofSTSLCO3.6.6A;andareconsistent withPSLlandPSL2TS3.0.3.ACTION-l.e:
WithtwoCStrainsinoperable oranycombination ofthreeormoretrainsinoperable, proposedACTION-1.e requiresLCO3.0.3tobeenteredimmediately.
Inthiscondition, theunitisoutsidetheaccidentanalysesfortheapplicable operational modes.Theproposedcondition(s),
requiredaction,completion time,andbasisareequivalent toACTION"E"ofSTSLCO3.6.6A.ACTION<<2.a:
Withonecontainment coolingtraininoperable duringMODE3conditions withpressurizer pressure<1750psia,ACTION-2.a requirestheinoperable traintoberestoredtoOPERABLEstatuswithin72hours.FPLhasverifiedthat,duringtheseconditions, containment designpressureandtemperature willnotbeexceededwhentwocontainment fancoolersareoperable(bothCStrainsoutofservice).
Therefore, theactioncompletion timeisreasonable, takingintoaccountthelowprobability ofaDBAoccurring duringthisperiodandtheheatremovalcapability oftheremaining OPERABLEfancoolers.Iftheinoperable containment coolingtraincannotberestoredtoOPERABLEstatuswithintherequiredactioncompletion time,ACTION-2.arequirestheplanttobeinMODE4withinthenext6hours.ThisproposedactionwillbringtheplanttoamodeinwhichtheLCOdoesnotapply,andisconsistent withPSL1andPSL2TS3.0.3.
St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 1Page8of8ACTION-2.b:
Withtwocontainment coolingtrainsinoperable duringMODE3conditions withpressurizer pressure<1750psia,ACTION-2.b requiresLCO3.0.3tobeenteredimmediately.
SincetheproposedLCOdoesnotrequiretheCSsystemtobeOPERABLEwithpressurizer pressure<1750psia,theunitwillbeoutsidethecontainment analysisforthiscondition.
Theproposedactionwillbringtheplanttoanoperational MODEinwhichtheLCOdo'esnotapply.SURVEILLANCE REQUIREMENTS:
Theproposedsurveillance requirements (SR)areequivalent tothesurveillances identified inSpecification 3.6.6AoftheSTS.ItisnotedthatneitherPSL1norPSL2requireapre-filled sprayheadertoensurethatsprayflowwillbeadmittedtothecontainment atmosphere withinthetimeframeassumedinthesafetyanalyses; therefore, SR3.6.6A.4oftheSTSisnotapplicable.
Conclusion ThechangesproposedforexistingTS3/4.6.2.1 and3/4.6.2.3 havebeenverifiedtobeconsistent withthePSL1andPSL2safetyanalyses.
Theproposedrestructured TS3/4.6.2.1, considering plantspecificdifferences, isequivalent toNUREG-1432, Revision0,Specification 3.6.6Aanditsassociated bases,andincludesallrelatedrequirements fortheContainment SprayandContainment CoolingSystems.Therefore, FPLconsiders theproposedamendment tobeacceptable asaTSlineitemimprovement forSt.LucieUnit1andUnit2,consistent withtheCommission's FinalPolicyStatement onTechnical Specification Improvements (58FR39132).
St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsATTACHMENT 2DETERMINATION OFNOSIGNIFICANT HAZARDSCONSIDERATION St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 2Page1of2DETERMINATION OFNOSIGNIFICANT HAZARDSCONSIDERATION Pursuantto10CFR50.92, adetermination maybemadethataproposedlicenseamendment involvesnosignificant hazardsconsideration ifoperation ofthefacilityinaccordance withtheproposedamendment wouldnot:(1)involveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated; or(2)createthepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated; or(3)involveasignificant reduction inamarginofsafety.Eachstandardisdiscussed asfollows:(1)Operation ofthefacilityinaccordance withtheproposedamendment wouldnotinvolveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.
Theproposedamendment willupgradetheexistingLimitingConditions forOperation (LCOs)associated withtheContainment CoolingandSpraySystemstobeconsistent withNUREG-1432, StandardTechnical Specifications forCombustion Engineering Plants.TheContainment CoolingandSpraySystemsarenotinitiators ofaccidents previously evaluated, butareincludedaspartofthesuccesspathsassociated withmitigating variousaccidents andtransients.
Theredundancy affordedbyContainment CoolingandSpraySystemsinconjunction withtherequirements oftheproposedLCOassuresthatthesafetyfunctionofthesesystemscanbeaccomplished considering singlefailurecriteria.
NeitherthedesignnorthesafetyfunctionoftheContainment CoolingandSpraySystemshavebeenaltered,andtheproposedamendment doesnotchangetheapplicable plantsafetyanalyses.
Therefore, operation ofthefacilityinaccordance withtheproposedamendment willnotinvolveasignificant increaseintheprobability orconsequences ofanaccidentpreviously evaluated.
(2)Operation ofthefacilityinaccordance withtheproposedamendment wouldnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated.
Theproposedamendment willnotchangethephysicalplantorthemodesofoperation definedinthefacilitylicense.Thechanges St.LucieUnit1andUnit2DocketNos.50-335and50-389ProposedLicenseAmendments Containment SraandCoolinSstemsL-94-260Attachment 2Page2of2areadministrative innatureinthattheydonotinvolvetheadditionofnewequipment orthemodification ofexistingequipment, nordotheyotherwise alterthedesignofSt.LucieUnit1&2systems.Therefore, operation ofthefacilityinaccordance withtheproposedamendment wouldnotcreatethepossibility ofanewordifferent kindofaccidentfromanyaccidentpreviously evaluated.
(3)Operation ofthefacilityinaccordance withtheproposedamendment wouldnotinvolveasignificant reduction inamarginofsafety.ThesafetyfunctionoftheContainment CoolingSystemistoprovidecontainment heatremovalduringnormaloperation andaccidentconditions.
ThesafetyfunctionoftheContainment SpraySystemistoprovidecontainment heatandiodineremovalduringaccidentconditions.
Theproposedamendment, inconjunction withtheredundancy affordedbytheContainment CoolingandSpraysystemdesign,assuresthatthesesafetyfunctions canbeaccomplished considering single-failure criteria.
Thebasesforrec{uired actionsandtheactioncompletion timesspecified for.inoperable Containment CoolingandSpraytrainsareconsistent withthecorresponding specifications inNUREG-1432.
Thesafetyanalysesforapplicable accidents andtransients remainunchanged fromthosepreviously evaluated andreportedintheUpdatedFinalSafetyAnalysisReport.Therefore, operation ofthefacilityinaccordance withtheproposedamendment wouldnotinvolveasignificant reduction inamarginofsafety.Basedontheabovediscussion andthesupporting Evaluation ofTechnical Specification changes,FPLhasdetermined thattheproposedlicenseamendment involvesnosignificant hazardsconsideration.