ML17216A333

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Forwards Response to SER Open Items Identified in NRC 850425 Ltr Re Reg Guide 1.97 & Rev 1 to Emergency Evaluation of Instrumentation Sys for Reg Guide 1.97,Rev 3 for Units 1 & 3,respectively
ML17216A333
Person / Time
Site: Saint Lucie  NextEra Energy icon.png
Issue date: 11/18/1985
From: WILLIAMS J W
FLORIDA POWER & LIGHT CO.
To: BUTCHER E J
Office of Nuclear Reactor Regulation
Shared Package
ML17216A335 List:
References
RTR-REGGD-01.097, RTR-REGGD-1.097 GL-82-33, L-85-417, TAC-51135, TAC-51136, NUDOCS 8511210172
Download: ML17216A333 (22)


Text

"..REGULATOR>Fa'RMji'IO'N,DISTRICT'uTiON,,~'ieiOi).'.,'.-,'",-,:,,"'ACCESSIONNBR'e85$1'210172RC~DPE:'85'/C1Vi'885T'ARAE'D:N'0DOCKSFACIL<:50335St',Luc)ePlantiUnitiiFloridaPower8LightCo,0500033550389St;LuciePlanti,Undt2'iFloridaPower8Light"Co~05000389AUTH~NAME'UTHORAFFILIATiIONNIL'LIAMS'iJ~li,FlatidaPowerLLight"Co,'ECIP~NAME!'=RECIPIENT.AFFILIATIONBUTCHERi~4J~e'perating,ReactorsBranch,3C'SUBJECT'.>>Fotwardsresponse'oSER>>openitemsidentified,inNRC'-850425ltrreiRegGuide~1.97LRev1to"EmergencyEvaluationofInstrumentationSysforRegGuide>>1.97rRev3"forUnits13erespectively,/+/lISTRIBUT'IONCODE!A003D"CPIESRECEIVEDILiTRENCLQ"SIZE~TITLE:i'R/LicensingSubmittal:Suppl1toNUREG0737(GenericLtr82"33)NOTES!OLC02/01/76OL+04/06/830500033505000389RECIPIENTSIDCODE'/NAME)NRR>>ORB3BCIINTERNALSADM/LFMBNRRPAULSON'~NNRR/DHFS/PSRBlNRR/DL/ORB5NRR/DSI/ICSBNRR~BiESEXTERNAL'4XNRC~PDR<COPIESLTTRENCL'70112'11+1a1~1oRECIPIENT!IDCODE'/NAME'RR'RB3~BCIE/DEPER/EPBNRR/DHFS/HFEBNRR/DL/ORABNRR/DSI/CP8NRR/DSI/METBNRR/DSI/RSBRGN2'PDRNSICCOPIESLTTRENCL3511111101*0.TOTALNUMBER<OF',COPIES'EQUIRED:LTTR43ENCL~

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~iigp.ox14000,JUNDBEAGH,FL33408~ytIII+gi".~ta"J'Pkv~AXQFLORIDAPOWER8tLIGHTCOMPANYL-85-4I7OfficeofNuclearReactorRegulationAttention:Mr.EdwardJ.Butcher,ActingChiefOperatingReactorsBranch$13DivisionofLicensingU.S.NuclearRegulatoryCommissionWashington,D.C.20555

DearMr.Butcher:

Re:St.LucieUnitNos.I&2DocketNos.50-335&50-389ConformancetoRegulatoryGuideI.97NRCTACNos.5II35&5II36AttachedisFloridaPower&LightCompany'sresponsetotheopenitemsidentifiedintheinterimreportcontainedinNRC'sletterofApril25,l985.AlsoattachedaretherevisedRegulatoryGuidel.97EvaluationReportsforSt.LucieUnitsI&2.Verytrulyyours,-J.W.Williams,Jr.:~,GroupVicePresident',Nuclea"rEner"gyltJWW/GRM/gp1pAttachments'ltii4t~<Pcc:Dr.J.NelsonGrace,RegionII,USNRCHaroldF.Reis,Esquire8511210172851118PDR'DO05000335:EPDRI)tjj,(iGRMI/0I0/IPEOPLE...SERVINGPEOPLE po'4>>4'l~3I1$)CANrll,INf1C Re:St.LucieUnitNos.I&2DocketNos.50-335&50-389ConformancetoRegulatoryGuidel.97ATTACHMENTIRESPONSETONRCREQUESTFORADDITIONALINFORMATIONDATEDAPRIL25,1985ONREGULATORYGUIDE1.97REV.3REPORT I~~krrp~p~II'~1LAQ~>~~~pctfj'<lAIaJ.~>f4t1~eIL4~

PageIof8ATTACHMENT1St.LucieUnits1and2EngineeringResponsetotheNRCEvaluationofFPLR.G.1.97ReportBackroundOnDecember17,1982,NRCissuedGenericLetter82-33(Reference1)toalllicensees.Inthatletter,NRCrequiredthatalllicenseesofoperatingreactors,applicantsforoperatinglicensesandholdersofconstructionpermitsprovideanevaluationoftheconformanceoftheirplant(s)toRegulatoryGuide(RG)1.97,Rev.2(Reference2).InFPLlettersdatedDecember30,1983(Reference3)andNovember30,1983(Reference4),FPLprovidedtherequiredevaluationsforSt.LucieUnits1and2respectively.TheseevaluationswereperformedagainsttherequirementsofR.G.1.97Rev.3(Reference5)whichwasissuedsubsequenttoGenericLetter82-33.InanNRCletterdatedApril25,1985(Reference6),thestaffprovidedaninterimreportonSt.LucieUnits1and2'sconformancetoR.G.1.97.Thereport,whichwaspreparedbyEGRGIdahoforNRC,onlyaddressesexceptionstakentotheguidanceofR.G.1.97.DiscussionNRC'sletterdatedApril25,1985requestedthattheapplicantreviewthestaff'sreportofR.G.1.97andidentifyanyincorrectassumptionsorcommitmentsthatmaybebeyondthescopeofpreviousFPLresponsesThefollowinginformationisprovidedinresponsetoeachoftheopenitemsidentifiedinthestaff'sSER.(Refertosection3.3oftheNRCreport.)3.3.1NeutronFlux(ItemB-1)DuringthelastrefuelingoutageforSt.LucieUnit2,twocompletelyqualified'postaccidentmonitoringchannelsforthisvariablewereinstalled.ThesenewchannelscomplywiththerequirementsofR.G.1.97forbothrangeandqualification.TherevisedR.G.1.97reportforSt.Lucie2reflectsthesechanges.St.Lucie1isscheduledtoinstalltwonewneutronfluxmonitoringchannelsbytheendofthenextrefuelingoutage.ThesechannelswillcomplywiththerequirementsofR.G.1.97Rev.3.FPLconcludesthatUnit2isinfullcompliancewith1.97forthisvariableand'thatUnit1willcomplybytheendofthenextrefuelingoutage.

~~Lv~4~1~fll'flt~'t)N.1Ve Page2of8RCSSolubleBoronConcentration(ItemB-3)R.G.1.97recommendscontinuousreadinginstrumentationwitharangeof0to6000PPMforthisvariable.FPLtakesexceptiontothisrequirement.Instrumentationisprovidedthatcoversrangesof0to2050PPM(Unit1)and0to1250/5000PPM(Unit2)forthisvariable.Inaddition,boronconcentrationcanalsobemeasuredbygrabsamplingandbypostaccidentsampling.EGRGidentifiedthatthisexceptionwasbeyondthescopeoftheirreviewandisbeingaddressedbyNRCaspartofthereviewofNUREG-0737,ItemII.B.3"PostAccidentSampling".FPLnotesthattheNRChasapprovedthePostAccidentSamplingSystem(PASS)forSt.LucieUnit1(Reference7)and2(Reference8)withtheexceptionoftheCoreDamageAssessmentProcedure,whichwasapprovedonaninterimbasis.AfinalCoreDamageAssessmentprocedurehasbeenapprovedforSt.LuciePlantbythestaff(Reference9).FPLconcludesthatsincethePASSforbothSt.Lucie1R2hasbeenfoundacceptabletoNRC,thedeviationsfromR.G.1.97forthisvariableareacceptable.RCSHotLandColdLWaterTemerature(ItemsB-5andB-6)R.G.1.97recommendsRCShotlegandcoldlegtemperatureinstrumentationwitharangeof50oFto700oF.ForSt.LucieUnit1,FPLprovidesinstrumentationwitharangeof212Fto705oF.St.LucieUnit2complieswiththerequirementsofR.G.1.97.FPLbelievestheexistinginstrumentationforSt.Lucie1isadequateforitsintendedfunction.ThepurposeofRCShotandcoldlegtemperatureindicationistodetermineRCSfluidtemperatureandtoassurecoreheatisbeingremovedbyassuringaCLtbetweenhotandcoldlegtemperatures.FortemperatureswheretheRCStemperatureisbelow350oF,theShutdownCooling(SDC)Systemwouldbeinoperation,takingsuctionfromthehotlegs(normal)orthecontainmentsump(postLOCA)anddischargingintotheRCSattheoutletoftheReactorCoolantpumps.InthisinstanceotherinstrumentationisavailabletodetermineRCStemperaturesasdiscussedbelow.WhentheshutdowncoolingsystemisinoperationhotlegtemperatureswouldbecloselyrepresentedbytheCoreExitThermocouples(CETs),whichhavearangeof32oFto2300oF.Thisinstrumentation,whichispartoftheInadequateCoreCoolingSystem(ICCS),isfullyqualifiedforpostLOCAenvironment.SincetherangeoftheCETsoverlapstherequiredrangeforRCShotlegtemperature,newhotlegRTD'sarenotrequired.WhenSDCisinoperation,coldlegtemperatureswouldbecloselyrepresentedbySDCtemperatureelementTE3351Y(locatedontheLPSIheader)whichprovidescontrolroomindication(TR-3351).Thisinstrumenthasarangeof0to400oF,whichoverlapstherangerecommendedforthecoldlegRTDs.Becauseotherinstrumentationisavailablefordetermininghotandcoldlegtemperaturesbelow212oF,expandedrangeforthehotandcoldlegRTDsisnotrequired.

00~'II4~ll 4(%Page3of83.3.43.3.5RCSPressure(PressurizerPressureItemB-7)tR.G.1.97recommendsprovidinginstrumentationwitharangeof0-4000psigforthisvariable.FPLprovidesinstrumentationwitha=rangeof0-3000psig,whichisadequatetomonitorallexpectedRCSpressuresbasedonplantaccidentanalysis.ThisdeviationisconsideredacceptablependingresolutionofATWS.FPLwilladdresstheATWSissuewhenresolutionis'completedbytheCombustionEngineeringOwnersGroup(GEOG).ContainmentIsolationValvePosition(ItemB-14)3.3.6AcceptabletoNRC.RadioactivitConcentrationorRadiationLevelinCirculatinPrimarCoolantItemC-2InFPL'sresponsetoR.G.1.97(Reference3,4),weidentifiedthisitemasanareaforadditionalstudy.FPLhascompletedafeasibilitystudyandmarketresearchwhichhasdeterminedthatdetectionsystemscurrentlyonthemarketcannotprovidetheoperatorswithunambiguousinformationconcerningtheconditionofthefuelcladding.Therefore,webelievethatdetectionoffuelcladdingfailureismorepreciselydeterminedbyobtainingaprimarycoolantgrabsample.ThiscapabilitypresentlyexistsatSt.LucieUnitNos.1dc2inthePost-AccidentSamplingSysteminaccordancewithrequirementsandguidancediscussedinNUREG-0737"ClarificationoftheTMIActionPlanRequirements."3.3.7Therefore,FPLproposestoemploythegrabsamplingcapabilitiesofthePost-AccidentSamplingSystemtocomplywiththeintentofReg.Guide1.97,Rev.3forthisvariable.AccumulatorTankLevelandPressure(ItemD-3)R.G.1.9?recommendslevelinstrumentationwitharangeof10-90%foraccumulatortanklevel.ForSt.Lucie1,FPLdeviatesfromthisrequirementbyprovidinglevelinstrumentationwitharangeof20-60%.AtSt.Lucie1,tomaintaintheTechnicalSpecificationrequiredlevelintheSafetyInjectionTanks(SITs,akaaccumulators),theHiandLowalarmsetpointsaresetonly3%apart.Thisis396oftheexistingnarrowrangedifferential.Expandingtherangewilldecreaseaccuracycausingoperatingdifficultyandalarmrecognitionproblemswithoutanytangiblebenefits.Fortheabovereason,FPLconsiderstheexistingrangeonthisinstrumentationadequateforitsapplication.Inaddition,R.G.1.9?recommendsthatSITlevelandpressureinstrumentationbeenvironmentallyqualified.FPLtookexceptiontothisrequirementinouroriginalR.G.1.97submittalsforSt.LucieUnits1and2.Thestaffhasidentifiedthatforenvironmentalqualification,R.G.1.97hasbeensupersededby10CFR50.49.

gs~-calfi00ah'fP'fI'ffIff1'klIIif'wcf$(~f'llI4II~l~~afIiI,IIh'1'if'gl Page4of8TheSafetyInjectionTanksarepassivesafetydeviceswhosesafetyfunctionistorefloodthereactorcorefollowingtheblowdownphaseofalargebreakLossofCoolantAccident(LOCA).FourSITsareconnectedtotheRCS,onetoeachcoldleg.BetweentheRCSandSITispipingcontainingonelockedopenmotoroperatedvalveandonecheckvalvetopreventbackflowofreactorcoolantintotheSIT.FollowingtheblowdownphaseofaLOCA,thecontentsofeachSITareinjectedintotheRCSbytheexpansionofthepressurizedN2covergasovereachSIT.TheSITpressureandlevelinstrumentationfunctiontoprovideoperatorinformationsothatsufficientwaterandpressurizedgascanbemaintainedineachSITintheeventofaLOCA.ShouldaLOCAoccur,theSITlevelandpressureinstrumentationwouldprovidenoinformationfromwhichanyoperatoractionscouldbetaken,toensure:(i)theintegrityofthereactorcoolantpressureboundary,(ii)thecapabilitytoshutdownthereactorandmaintainitinasafeshutdowncondition,and(iii)thecapabilitytopreventormitigatetheconsequencesofaccidentsthatcouldresultinpotential'ffsiteexposurescomparabletothe10CFRPart100guidelines.SincetheSITsareatotallypassivesystem,properoperationofthetankswilloccurwithoutoperatorinterventionshouldRCSpressurefallbelowSITpressure.3.3.8Fortheabovestatedreasons,environmentalqualificationofeitherSITlevelorpressureisnotrequiredpertherequirementsof10CFR50.49.RefuelinWaterStoraeTankLevel(ItemD-8)3.3.9AcceptabletoNRC.PressurizerLevel(ItemD-11)InouroriginalsubmittalsonR.G.1.97forSt.LucieUnits142(Reference3and4),FPLidentifiedthattheinstrumentationfordeterminingpressurizerlevelisnarrowrange.Thisreferredtotheinstrumentcalibrationrangeof175"to349"W.C.differentialpressure,whichcorrespondstowiderangepressurizerlevelwhenthepressurizerisat650oF(i.e.,hotcalibratedinstrumentation).FPLconcludesthatwiththeaboveinstrumentationforpressurizerlevelmeetstheintentofR.G.1.97requirements.3.3.10PressurizerHeaterStatus(ItemD-12)R.G.1.97recommendsthatpressurizerheatercurrentindicationbeprovidedinthecontrolroom.Thisinstrumentationisrecommendedtoassureoverloadingofadieselgeneratorwillnotoccur.FPLprovides lli1I4'gI(f44(5N4~~

~~Page5of83.3.11pressurizerheatercurrentindication,butforUnit1thisinstrumentationislocallyindicated.Unit1,however,isprovidedwithControlRoomindicationofpressurizerheaterkilowatts.SincethisisamoredirectindicationofapossibleDGoverloadcondition,Unit1complieswiththeintentofR.G.1.9V.uenchTankLevel(ItemD-13)3.3.12AcceptabletoNRC.uenchTankTemerature(ItemD-14)AcceptabletoNRC3.3.13SteamGeneratorLevel(ItemD-16)R.G.1.9Vrecommendswiderangeinstrumentation(tubesheettotheseparators)beprovidedforthisvariable.FPLprovidesredundantqualifiedinstrumentationforsteamgeneratorlevel,howeveritisnarrowrange.Awiderangenon-safetychannelisavailableandmeetstherecommendedrange,butitisnotCategory1instrumentation.FPLconsiderstheexistinginstrumentationatSt.Lucietobeadequateforitsintendedfunction.R.G.1.97requirescertaininstrumentationto"provideinformationrequiredtopermittheoperatortotakepreplannedmanualactionstoaccomplishsafeplantshutdown"(i.e.,accidentidentificationandmitigation)andtodetermineifsystemsimportanttosafetyareperformingtheirintendedfunction(i.e.,availabilityoftheSGsasheatsinks).Lowsteamgeneratorlevelisanindicatorofanumberofpossibleevents;includingaMainSteamLineBreak(MSLB),LossofFeedwater(LOFW)andLossofLoad(LOL)events.Foreachoftheseevents,however,thequalifiedSGpressureinstrumentationmustbeusedforidentificationofthespecifictransient.TheaccidentanalysesinChapter15oftheFinalSafetyAnalysisReports(FSAR)forbothSt.LucieUnits1and2addresstheseevents.Inallcases,nooperatoractioniscreditedduringthefirstminutesofanevent.Automaticactionswillprotecttheplantuntiltheoperatorcanidentifytheevent,usingtheexistinginstrumentation,andtakeappropriateaction.TheavailabilityoftheSGsasheatsinksisdeterminedfromSGpressure.OtherinstrumentationavailabletodetermineSGavailabilityaretheauxiliaryfeedwatersystempressureandflowinstrumentationandthemainfeedwaterflowinstrumentation.ThisadditionalinformationissufficienttoassessSGavailabilityasaheatsinkfortheRCS.FPLconsiderstheexistinginstrumentationadequateforitsfunction.

~>>0~44I~>>,)VV"I)4'>>44)JJV<>>IV')4)tS>u4~~4h"VV)V'4)1V>>gVVS)I4~J>>I"*4)Vg)~~I4~'II'VVJ'4I."4)JIV Page6of83.3.14Safet/ReliefValvePositionsorMainSteamFlow(ItemD-18)R.G.1.97recommendsthattheinstrumentationprovidedtomonitorthisvariablebeenvironmentallyqualified.FPLprovidesinstrumentationwithproperrangeandthatispartiallyqualified,butnotfullyqualifiedforin-containmentpost-accidentoperation.ThemainsteamflowinstrumentationatSt.Lucieprovidesbothoperatorindicationandinputtothefeedwatercontrolsystemandturbinerunbackcalculator(Unit1).Nosafetygradefunctionsareoperatedfromthisinstrumentation.TheintentoftheR.G.1.97requirementforthisinstrumentationistoprovideindicationofapossiblemisoperationofamainsteamsafetyorreliefvalve.Themisoperationofareliefvalvewouldresultinahighsteamflowconditionwhichwouldbeidentifiedbythemainsteamflowinstrumentation.Sincethemainsteamsafetiesareoutsidecontainmentandthemainsteamflowinstrumentationisinsidecontainment,noenvironmentalqualificationconcernispresent.ForaMSLBinsidecontainment,theenvironmentalqualificationofthemainsteamflowinstrumentationwouldbechallenged.However,forthiseventthisinstrumentationwouldprovidenoinputtoanysafetysystem.OperatoridentificationandsafetysystemactuationforaMSLBinsidecontainmentisprovidedbysteamgeneratorpressureandlevelandbycontainmentpressure.SinceotherinstrumentationisprovidedwhichwouldprovideinformationofaMSLBinsidecontainment,FPLconsiderstheexistinginstrumentationadequateforitsintendedfunction.3.3.15MainFeedwaterFlow(ItemD-19)ThisitemwasidentifiedasbeingacceptabletoNRC.Thedesignmainfeedwaterflowis5.85x10lb/hr,whichwouldrequirea0to6.4x106lb/hrinstrumentrange.Theexistingrangeisclosetotherequiredrangeandwilladequatelymonitoroperationofthissysteminpost-accidentconditions.ThisisanacceptabledeviationfromR.G.1.97.3.3.16HeatRemovalBtheContainmentFanHeatRemovalSstemItemD-23R.G.1.97recommendsthattheinstrumentationprovidedforthisvariablebeenvironmentallyqualified.FPLhastakenexceptiontothisposition,sincetheseinstrumentsperformnosafetyfunctionduringorafteranaccident.Duringadesignbasisevent(LOCAorMSLB),allfourcontainmentfancoolersreceiveastartsignalandremainoperationalduringtheevent.ContainmentHeatRemoval,whichisthesafetyfunctionofthecontainmentfancoolers,isdirectlyindicatedbycontainmentatmospheretemperatureinstrumentation.Sincethecontainmentatmospheretemperatureindicationisfullyqualifiedandprovidesthenecessaryinformationoncontainmenttemperature,qualifiedcontainmentfancoolerRTDsarenotrequired.

Naaa<4'<I~I.~<Na<<R~<I'f,,Na<~IN,$',<$~<$f~I<I,f<N>>,">>'NrIh<<i,N.at,>Fhi.l...'.<<-~NN<<<ffl<ygfjall<f~Ng~N<bl<<<Nraill<N<<,",>>NJ4ffN<Nflaf<Cl~I'~II<4\ar>>lh~fNIifa,ifI<<l'~4<I(<<<hfff4raa4~~'>>afaaf<Fa*~4yf>>ail'<<<If'NIll.f<<LNN'lail'~<~4N<a<l~>>IaI~4Illl'ai~'f<~""<<I'<4<<<rt'llaflNNhhffI~<<faN"fI'<NaI,lf4iiayla<N<<at<~aN<N<'III~I4 I~~Page7of8.3.3.17ContainmentAtmoshereTemerature(Unit1onl)(ItemD-24)AcceptabletoNRC.3.3.18.LetdownPlow-Out(Unit1onl)(ItemD-27)AcceptabletoNRC.3.3.19VolumeControlTankLevel(ItemD-28)R.G.1.97recommendsinstrumentationwitharangeoftoptobottomforthisvariableandthatisenvironmentaQyqualified.PorUnit2,FPLprovidesinstrumentationwitharangeof14.1to85.996ofthetankvolume.Thisisconsideredacceptablesincethenormaloperatingrangeofthistankis38to56%.Lowandhighlevelcontrolroomannunciationwillnotifytheoperatorofanydeviationfromthisband.Thereforetheexistingrangeforthisinstrumentationisconsideredadequateforitsintendeduse.TheVCTisusedduringnormalplantoperationforcontrollingRCSvolumeandchemistry.Duringanaccident,theVCTisisolated,withthechargingpumpstakingsuctionfromeithertheBoricAcidMakeup(BAM)tanksortheRefuelingWaterStorageTank(RWT).SincetheVCTisnotrequiredtomitigatetheconsequencesofanaccident,environmentalqualificationoftheassociatedlevelinstrumentationisnotrequired.3.3.20HihLevelRadioactiveLiuidTankLevel(ItemD-31)3.3.21AcceptabletoNRC.lRadiationExosureRate(insidebuildinsorareaswhereaccessisreuiredtoserviceeuimentimortanttosafetItemE-2R.G.1.97recommendsCategory3instrumentationwitharangeof10to104R/hr.FPLidentifedthatacompletelowrangemonitoringsystemisprovidedintheAuxiliaryBuildingofbothUnits.TherevisedR.G.1.97reportsforSt.LucieUnits1and2identifytherangeandlocationoftheseinstruments.3.3.22ContainmentorPureEffluent(ItemE-3)AcceptabletoNRC.3.3.23EstimationofAtmoshericStabilit(ItemE-16)AcceptabletoNRC.

~.I0JI~~~1 Page8of8III.References1)NRCletter,D.G.Eisenhuttoalllicenseesofoperatingreactors,applicantsforoperatinglicensesandholdersofconstructionpermits,"SupplementN'o.1toNUREG-0737-RequirementsforEmergencyResponseCapability(GenericLetterNo.82-33),"December17,1982.2)InstrumentationforL'iht-Water-CooledNuclearPowerPlantstoAssessPlantandEnvironsConditionsDurinandFollowinanAccident,RegulatoryGuide1.97,Revision2,U.S.NuclearRegulatoryCommission(NRC),OfficeofStandardsDevelopment,December1980.3)FloridaPowerandLightCompanyletterL-83-605,J.W.Williams,Jr.toDirector,OfficeofNuclearReactorRegulationDecember30,1983.4)FloridaPowerandLightCompanyletterL-83-573,J.W.Williams,Jr.toDirector,OfficeofNuclearReactorRegulation,November30,1983.5)InstrumentationforLiht-Water-CooledNuclearPowerPlantstoAssessPlantandEnvironsConditionsDurinandFollowinanAccident,RegulatoryGuide1.97,Revision3,U.S.NuclearRegulatoryCommission(NRC),OfficeofNuclearRegulatoryResearch,May1983.6)NRCletter,J.R.Miller(NRC)toJ.W.Williams,Jr.(FPL),"ConformancetoRegulatoryGuide(RG)1.97,Revision2",April25,1985.7)NRCletter,J.R.Miller(NRC)toJ.W.Williams,Jr.(FPL)"PostAccidentSamplingSystem(NUREG-0737),ItemII.B.3)",September28,1983.8)NUREG-0843Supplement3SafetEvaluationReortRelatedtothe0erationofSt.LuciePlantUnitNo.2,April1983.9)NRCletter,J.R.Miller(NRC)toJ.W.Williams,Jr.(FPL)"CoreDamageAssessmentProcedure",March8,1985.WP/DISCOB0002/NRCResponse/0685/BL

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