ML17212A922: Difference between revisions

From kanterella
Jump to navigation Jump to search
(Created page by program invented by StriderTol)
(Created page by program invented by StriderTol)
Line 16: Line 16:


=Text=
=Text=
{{#Wiki_filter:REGULATORrINFORMATION'ISTR'IBUTIONbSTE<<l.(RIDS)ACCESSIOViNBR:8110280126'OC,DATE(:81/10/22NOTARIZED::NOFACIL(:50389St<+LuciePlantgUnit2~.FloridaPowerLLiightCo,,AUTH(.NAME(AUTHORAFFIL'IAT(IONUHRI9gR,E';Flor<idaPower((LightCo.RECIP~VARE(RECiIPZENTAFFIL<IATIO<VEiISE<VHUTrrDiG,,DivisionofLicensing
{{#Wiki_filter:REGULATOR rINFORMATION'ISTR'IBUTION bSTE<<l.(RIDS)ACCESSIOVi NBR:8110280126'OC,DATE(:
81/10/22NOTARIZED::
NOFACIL(:50 389St<+LuciePlantgUnit2~.FloridaPowerLLiightCo,,AUTH(.NAME(AUTHORAFFIL'IAT(ION UHRI9gR,E';Flor<idaPower((LightCo.RECIP~VARE(RECiIPZENT AFFIL<IATIO<V EiISE<VHUTrr DiG,,DivisionofLicensing


==SUBJECT:==
==SUBJECT:==
:ForwardsresponsetoC'orePerformance(Branchrequest>>foriaddiinfore(instrumentation<todetect"conditionsofinadequatecore<cooling.Updated<infoinresponseito811019teilconiencl,DISTRIBUTIONCODE(:80016COPIESRECEaVED:LiTRENCL(SIZE~:T(ITLE(:..-PSAR'/FSARAMDT6andRe,latedCorre'spondence<VOTES':".DOCKE(T0'5000389RECIPEKNT'OrCODE/t<(AMKIACTION::A/DrLiICEVSNGL<IC(BRi(r3LAINTERNAL(:'-ELO(HUR(FACiT'NG40,ILCISYSBR16'E'/EPDS(35i*L<IC(GUIDBR"33iNATLE'VG,BR'7MPAlNRR</DE'/EQB13iNRR'/DSI</ASB27iVRR'/OSIS'CSB09OPLIC8Ri34PROC/TST'EV20.ESSBR22'.REG<IL'4<VGBR'25<EXTERNALi:ACR641>>FE('lAREPDIV39NRC(PDRI02!NT'ISCOPIESL<TTREiVCLr1010101111111111103II311111111111111161611111RECIPIENTIDCODE/NAMEL(ICBR03BC<VERSESrV.01GEOSCIENCES28HYD'/GEOBR30I8Ei06'E'/EPLB,36'iIC'UALrBR32'ECH'<VGBR18NRR/DE/CEB,11=NRR/DSIi/AEB26NRR/DSI/CPB10iVRR/DSI"/ET<8812'OWERSYSBR19QA.BR21=-REAC<SYSBR23SIT<ANAL(BR2'4BiVL(AMD'TSONLY)LPDR<03VSIC05COPIEBLq'<TR(ENCL(10.122'2'3<33<11111111111111111111111VOV01SgJ>TO<TAL<VU4lBER(OFCOPIES'EQUIRED!:LiTTR63ENCL(58 ePI P.o.BOX529100MIAMI,FL33152kiA~4%FLORIDAPOWER&LIGHTCOMPANYOctober22,1981L-81-463OfficeofNuclearReactorRegulationAttention:Mr.DarrellG.Eisenhut,DirectorDivisionofLicensingU.S.NuclearRegulatoryCommissionWashington,D.C.20555
:
ForwardsresponsetoC'orePerformance(Branchrequest>>foriaddiinfore(instrumentation<
todetect"conditions ofinadequate core<cooling.Updated<
infoinresponsei to811019teilconiencl,DISTRIBUTION CODE(:80016COPIESRECEaVED:LiTRENCL(SIZE~:
T(ITLE(:..
-PSAR'/FSAR AMDT6andRe,latedCorre'spondence
<VOTES':".DOCKE(T0'5000389 RECIPEKNT'OrCODE/t<(AMKI ACTION::A/DrLiICEVSNG L<IC(BRi(r3LAINTERNAL(:'-ELO(HUR(FACiT'NG40,ILCISYSBR16'E'/EPDS(
35i*L<IC(GUIDBR"33iNATLE'VG,BR'7MPAlNRR</DE'/EQB 13iNRR'/DSI</ASB27iVRR'/OSIS'CSB 09OPLIC8Ri34PROC/TST'EV 20.ESSBR22'.REG<IL'4<VGBR'25<EXTERNALi:
ACR641>>FE('lAREPDIV39NRC(PDRI02!NT'ISCOPIESL<TTREiVCLr1010101111111111103II311111111111111161611111RECIPIENT IDCODE/NAME L(ICBR03BC<VERSESrV.
01GEOSCIENCES 28HYD'/GEOBR30I8Ei06'E'/EPLB,36'iIC'UALr BR32'ECH'<VG BR18NRR/DE/CEB, 11=NRR/DSIi/AEB26NRR/DSI/CPB 10iVRR/DSI"/ET<8812'OWERSYSBR19QA.BR21=-REAC<SYSBR23SIT<ANAL(BR2'4BiVL(AMD'TSONLY)LPDR<03VSIC05COPIEBLq'<TR(ENCL(10.122'2'3<33<11111111111111111111111VOV01SgJ>TO<TAL<VU4lBER(
OFCOPIES'EQUIRED!:
LiTTR63ENCL(58 ePI P.o.BOX529100MIAMI,FL33152kiA~4%FLORIDAPOWER&LIGHTCOMPANYOctober22,1981L-81-463OfficeofNuclearReactorRegulation Attention:
Mr.DarrellG.Eisenhut, DirectorDivisionofLicensing U.S.NuclearRegulatory Commission Washington, D.C.20555


==DearMr.Eisenhut:==
==DearMr.Eisenhut:==
eE/((),Re:St.LucieUnit2DocketNo.50-389RequestsforAdditionalInformationInadeuateCoreCoolinInstrumentationAttachedisFloridaPower8LightCompany's.'responsetoaCorePerformanceBranchrequestforadditionalinformationconcerninginstrumentationtodetectconditionsofinadequatecorecooling.Alsoattachedisadditionalandupdatedinformationonthesame.subjectrequestedbytheNRCstaffduringatelephoneconversationonOctober19,1981betweenJ.Westhoven(C-E),R.Gritz(FPL),V.Nerses(NRC),andT.Huang(NRC).TheattachedinformationshouldcloseoutthisitemforSt.LucieUnit2.Shouldyouhaveanyadditionalquestions,pleasecallus.'erytrulyyours,ertE.UhrigVicePresidentAdvancedSystems8TechnologyREU/TCG/ahAttachmentscc:J.P.O'Reilly,Director,RegionII(w/oattachments)HaroldF.Reis,Esquire(w/oattachments)gooIBii0280i2hSii02t~PDRADQCK050089)ADR/PEOPLE...SERVINGPEOPLE PT~C~NTResponsetoNRCQuestionsonInadequateCoreCoolingInstrumentation ATTACHMENTAResonsetoNRCestionsonInadeuateCoreCoolinInstrumentation(1'-13)Responsestoquestions(1-13)wererespondedtoonagenericbasisby'theC-EOwnersGroup.TheseresponseswereprovidedinCEN-181-P,"GenericResponsestoNRCQuestionson.theC-EInadequateCoreCoolingInstrumentation",whichwastransmittedinaletterfromK.P.Baskin(Chair-manC-EOwnersGroup1toD.M.CrutchfielddatedSeptember15,1981.ThatletteralsotransmittedCEN-185,DocumentationofInadequateCoreCoolingInstrumentationforCombustionEngineeringNuclear.SteamSupplySystems",whichisapplicabletotheSt.Lucie-2ICC.instrumentation.Question14:4Describehowtheprocessortestsoperateto'eterminethatthe.sensoroutputsarewithinrange.HowaretherangesselectedfResponse:Analogsignalsareconvertedtodigitalformthrougha12bitresolutionA/Dconverter.Theinputelectricalrangesarepreprogrammedto0-10V,1-5V,4-20ma,10-50ma,andarangesuitableforTypeKthermocouples.Functionally,theanalogsignalsarefirstconvertedintovolts,thenscaledtoengineeringunits.Theinputvariableisthencomparedtoupperandloweroutofrangevaluestodetectoutofrangeinputs.Ifthevariableisoutofrange,thedisplaywillclearlyidentifythevariableasoutofrange.Theoutofrangevariableswillbeeliminatedfromalgorithms.Question15:Describethedisplaymeasurementunits.Response:TheprimaryICCdisplaywillbeintheCriticalFunctionMonitoringSystem.However,theQSPDSdisplaywillpresentthemeasuredvariablesinengineeringunits.Theengineeringunitswillbeinunitsmostdirectlydescribiqgtheprocess.FortheICCdetectionvariables,thefollowingunitswillbeused:FUNCTION1.Saturation/SubcooledMarginInputsUNITS-'FofPSIA(subcooledorsuperheat)-'ForPSIA2.ReactorVesselLevelAbovetheCoreInputs-%heightabovethecoreanddiscreteleveldisplaysoF3.CoreExitThermocoupleTemperatureoF Question16:Describewhichparameterorparameterswouldneedtobecalculatedfromthesensorinputs.ThedescriptionoftheQSODSimpliesthatsuchacalculationmightormightnotberequired.Whenwoulditberequired'henwoulditnotberequiredlResponse:ThefollowingICCdetectionparametersorvariablesrequirecalculationfromsensorinputs:1.Saturationorsubcooledmargin-Themaximumofthetemperatureinputsandtheminimumofthepressureinputsarecomparedtothesaturationtemperatureor'ressuretodeterminethetemperatureandpressuremargintosaturation.Superheatwill.becalculateduptothedifferencebetweentherangeoftheinputsandthesaturationtemperature.2.Reactorvessellevelabovethecore-TheHJTCsensordif-ferentialtemperatureandtheunheatedtemperaturearecomparedto,setpointstodetermineifaliquidcoveredoruncoveredcon-ditionexistsateachsensorlocation.Thecorrespondingleveloutputisdirectlyrelatedtothenumberofsensorsthatdetectliquidoranuncoveredstate.3.Representativecoreex'it".thermocoupletemperature-Atem-peraturewillbecalculatedtorepresentthenumberofcoreexitthermocoupletemperaturesacrossthecore.Thiscalcula-tionhasnotbeendeterminedyet.Itisanticipatedtobeanaveragecalculationsuchastheaveragingofthefivehighesttemperatures.Question17:Response:Specifically,describetheautomaticon-linesurveillancetests.Thefollowingon-linesurveillancetestsareperformedintheQSPDS:1.ThetemperatureinsidetheQSPDScabinetwithacoolingsystemalarmonhightemperature.2.Powerfailuretotheprocessorwithalarmonfailure.3.Badsensorsandbrokencommunicationlinkswithindicationonthedisplay.4.CPUmemory'heckanddatacommunicationcheckswithalarmandindicationontheplasmadisplayanddigitalpanelmeteronthecabinet.(Thesechecksareperformedperiodically.)5.Alaloginputoffsetvoltagewithcompensationperformedautomatically.6.Inputsoutofrangewithalarm(seeQuestion14).7.LowHJTCSdifferentialtemperaturewithalarm.
 
Question18:Describethemanualon-linediagnosticcapabilityandprocedures.Response:Theautomaticon-linesurveillancetestsreplacetheneedforamanualinitiatedon-lineoroff-linediagnostictesttobeper-for'medbythe,computer.Apagedisplayingthestatusoftheautomaticsurveillancetestswillbeprovidedtoaidoperatordiagnostics.Additionally,thefollowingmanualtestcapabilitiesareincludedinthedesign:1.CalibrationoftheA/D'boards(withautomaticoffsetvoltagecompensation).2.Resetofthesystem.Question19:Discussthepredeterminedsetpointfortheheatedjunctionther-mocouplesignalsandhowitwillbeselected.Response:AsetpointoneachoftwoinputsdeterminesthepresenceorabsenceofliquidateachHJTCsenorlocation:1.DifferentialtemperaturebetweentheunheatedandheatedHJTCjunctions,and2.UnheatedHJTCjunctiontemperature.Wheneitherofthesetwoinputtemperaturesexceedsthesetpointfortherespectiveinputtemperature,thelogicindicatesthattheli'quidlevelhasdroppedtoalevellowerthanthesensorlocation.Thesetpointvaluesarepredeterminedandareinstalledaspartofthelevellogicsoftware.Thedifferentialtemperaturesetpointiscalculated(basedontests)tobelowenoughtoobtainagoodresponsetimebuthighenoughtoassureliquidisnotpresent.Theunheatedjunctiontemperaturesetpointiscalculatedtoassurethatliquidisnotpresentatthesensorposition.
eE/((),Re:St.LucieUnit2DocketNo.50-389RequestsforAdditional Information InadeuateCoreCoolinInstrumentation AttachedisFloridaPower8LightCompany's
ATTACHMENT."B"DraftResponsestoAppendix1.9B Section3.1.1Replacement3.1.1SATURATIONMARGINSaturationMarginMonitoring(SMM)providesinformationtothereactoroperatoron(1)theapproachtoandexistenceofsaturationand(2)existenceo'fcoreuncovery.TheSMMincludesinputsfromRCScoldandhotlegtemperaturesmeasuredby"RTDs,thetemperatureofthemaximumofthetopthreeUnheatedJunctionThermocouples(UHJTC),representativecoreexittemperature,andpressurizerpressuresensors.TheUHJTCinputcomesfromtheoutputoftheHJTCSpro-cessingunits.Insummary,'hesensorinputsare'asfollows:~1nnt~RenePressurizerPressureColdLegTemperatureHotLegTemperatureMaximumUHJTCTemperatureoftopthreesensors(fromHJTCprocessing)0-3000p5ia0-710'F0-710'F200-2300'FRepresentativeCETTemperature200-2300'F3.2DESCRIPTIONOFICCPROCESSINGThefollowingsectionsprovideapreliminarydescriptionoftheprocessingcontrolanddisplayfunctionsassociatedwitheachoftheICCdetectioninstru-mentsintheAMS.ThesensorinputsforthemajorICCparameters;satura-tionmargin,reactorvesselinventory/temperatureabovethecore,andcoreexittemperatureareprocessedinthetwochannelQSPDSandtransmittedtotheSafety'ssessmentSystemforprimarydisplayandtrending.3.2.1SATURATIONMARGINTheQSPDSprocessingequipmentwillperformthefollowingsaturationmarginmonitoringfunctions:1.CalculatethesaturationmarginThesaturationtemperatureiscalculatedfromtheminimumpressureinput.Thetemperaturesubcooledorsuperheatmarginisthedifferencebetweensaturationtemperatureandthesensortemperatureinput.Threetemperaturessubcooledorsuperheatmarginpresentationswillbeavail-able.Theseareasfollows:
.'response toaCorePerformance Branchrequestforadditional information concerning instrumentation todetectconditions ofinadequate corecooling.Alsoattachedisadditional andupdatedinformation onthesame.subjectrequested bytheNRCstaffduringatelephone conversation onOctober19,1981betweenJ.Westhoven (C-E),R.Gritz(FPL),V.Nerses(NRC),andT.Huang(NRC).Theattachedinformation shouldcloseoutthisitemforSt.LucieUnit2.Shouldyouhaveanyadditional questions, pleasecallus.'erytrulyyours,ertE.UhrigVicePresident AdvancedSystems8Technology REU/TCG/ah Attachments cc:J.P.O'Reilly,
a.RCSsaturationmargin-thetemperaturesaturationmarginbased,onthedifferencebetweenthesaturationtemperatureandthemaximumtemperaturefromtheRTDsinthehotandcoldlegs.b.Upperheadsaturationmargin-temperaturesaturationmarginbasedonthedifferencebetweenthesaturationtemperatureandtheUHJTCtemperature(basedonthemaximumofthetopthree,UHJTC).CsCETsaturationmargin-temperaturesaturationmarginbasedthedifferencebetweenthesaturationtemperatureandtherepresenta-tioncoreexit,temperaturecalculatedfromtheCETs(Section2.2.3).2.Processsensoroutputsfordeterminationoftemperaturesaturationmargin.3.Provideanalarmoutputforan.annunciatorwhentemperaturesaturationmarginreachesapreslectedsetpoint(expectedtobewithinO'Fto'0'Fsubcool'ed)forRCSorupperheadsaturationmargin.CETsatura-tionmarginisnotalarmedtoavoidpossiblespuriousalarms.32'HEATEDJUNCTIONTHEMOCOUPLEThegSPDSprocessingequipmentperformsthefollowingfunctionsfortheHJTC:r1.Determinecollapsedliquidlevelabovecore.TheheatedandunheatedthermocouplesintheHJTCareconnectedinsuchawaythatabsoluteanddifferentialtemperaturesignalsareavailable.ThisisshowninFigure2-6.Whenliquid~atersurroundsthethermocouples,theirtemperatureandvoltageoutputsareapproxi-matelyequal.ThevoltageV(AC),onFigure2-6istherefore,approxi-matelyzero.lntheabsenceofliquid,thethermocoupletemperatures".andoutputvoltagebecomeunequal,causingVgACqto:rise.WhenVoftheindividualHJTCrisesaboveapredeterminedsetpoint,liquidinventorydoesnotexistatthisHJTCposition.2.Determinethemaximumupperplenum/headfluidtemperatureofthetopthreeunheatedthermocouplesforuseasanoutputtotheSMMcalcula-.tion.(Thetemperatureprocessingrangeisfrom100'Fto2300'F).3.Processinputsignalstodisplaycollapsedliquidlevelandunheatedjunctionthermocoupletemperatures.4.Provideanalarmoutput'whenanyoftheHJTCdetectstheabsenceofliquidlevel.
: Director, RegionII(w/oattachments)
5.ProvidecontrolofheaterpowerforproperHJTCoutputsignallevel.Figure2-7showsthedesignforoneofthetwochannelswhichincludestheheatercontrollerpowersupplies.3.2.3COREEXITTHERMOCOUPLESYSTEMTheQSPDSperformsthefollowingCETprocessingfunctions:1.Processcoreexit:thermocoupleinputsfordisplay.2.Calculatearepresentativecoreexittemperature..Althoughnotfinal-ized,thistemperaturewillbeeitherthemaximumvalidcoreexittemperatureortheaverageof.thefivehighestvalidcoreexittem-peratures.3.Provideanalarmoutputwhentemperaturereachesapreselectedvalue.I4.ProcessCETsfordisplayofCETtemperatureandsuperheat.ThesefunctionsareintendedtomeetthedesignrequirementsofNUREG-0737,II.F.2.Attachmentl.3.3SYSTEMDISPLAY,TheICCdetectioninstrumentationdisplaysinboththeSAS(primarydisplays)andtheQSPDS(backupdisplays)haveanICCsummarypageaspartofthecore.heatremovalcontrolcriticalfunctionsupportedbymoredetaileddisplaypagesforeachoftheICCvariablecategories.Thesummarypagewillinclude:1.RCS/UpperHeadsaturationmargin-themaximumoftheRCSandUpp'erHeadsaturationmargin.2.Reactorvessel.levelabovethecore.3.Representativecoieexittemperature.ISincetheSAShasmoredisplaycapabilitiesthantheQSPDSsuchascol,or-graphics,trending,andalargerformat,additionalinformationmaybeaddedandwithabetterpresentationthanisavailablewiththeQSPDS.ThesevariablesareincorporatedinotherSASsystemdisplays.SincetheSASreceivesbothQSPDSchannelsofICCinput,theSASdisplaysbothchannelsofICCinformation.TheQSPDSdisplaysonlyonechannelofICCinformationforeachvideodisplayunit.  
HaroldF.Reis,Esquire(w/oattachments) gooIBii0280i2h Sii02t~PDRADQCK050089)ADR/PEOPLE...
.Althoughallinputsareaccessiblefortrendingandhistoricalrecall,theSAShasadedicatedICCtrendpageforRCS/upperheadsaturationmargin,reactorvessellevel,andrepresentativecoreexittemperatureandcoreexitsaturationmargin.ThesearealsoavailableasanalogoutputsfromtheQSPDScabinet.tEachQSPDSsafetygradebackupdisplayalsohasavailablethemostreliablebasicinformationforeachoftheICCinstruments.Thesedisplaysarehumanengineeredtogive.theoperatorclear'nambiguousindications.Thebackupdisplaysaredesigned:1.Togiveinstrumentindicationsintheremotechancethattheprimary'isplaybecomesinoperable.2.Toprovideconfirmatoryindications.totheprimarydisplay.3.Toaidin'surveillancetestsanddiagnostics.ThefollowingsectionsdescribedisplaysaspresentlyconceivedforeachoftheICCinstrumentsystems.Bothprimaryandbackupdisplaysarein-tendedtobedesignedconsistentwiththecriteriainII.F.2Attachment1andAppendixB.3.3.1.*SATURATIONMARGINDISPLAYThefollowinginformation-ispresentedontheprimarySASandbackup(QSPDS)displays:TemperatureandpressuresaturationmarginsforRCS,UpperHead,CoreExitTemperature.2.Temperaturesandpressureinputs.3.3.2HEATEDJUNCTIONTHERMOCOUPLESYSTEMDISPLAYThefollowinginformationisdisplayedontheCFMSandQSPDSdisplays:LiuqidinventorylevelabovethefuelalignmentplatederivedfromtheeightdiscreteHJTCpositions.2.8discreteHJTCpositionsindicatingliquidinventoryabovethefuelalignmentplate.3.,InputsfromtheHJTCS:a.Unheated)unctiontemperatureatthe8positions.b.Heated)unctiontemperatureatthe8positions.c.Differentialjunctiontemperatureatthe8positions.
SERVINGPEOPLE PT~C~NTResponsetoNRCQuestions onInadequate CoreCoolingInstrumentation ATTACHMENT AResonsetoNRCestionsonInadeuateCoreCoolinInstrumentation (1'-13)Responses toquestions (1-13)wereresponded toonagenericbasisby'theC-EOwnersGroup.Theseresponses wereprovidedinCEN-181-P, "GenericResponses toNRCQuestions on.theC-EInadequate CoreCoolingInstrumentation",
2.3.4.COREEXITTHERMOCOUPLE'DISPLAYThefollowinginformationisdisplayedontheSASdisplay:AspatiallyorientedcoremapindicatingthetemperatureateachoftheCET's.2.Aselectivere'adingofCETtemperatures.3.Therepresentativecoreexittemperature.ThefollowinginformationisdisplayedontheQSPDSdisplay:2.Representative.coreexittemperature.~AselectivereadingoftheCETtemperatures(twohighesttempera-turesineachquadrant)3.Alistingofallcoreexittemperatures.ReplacementSection5.0.SYSTEMUALIFICATIONThequalificationprogramforSt.Lucie-2ICC.instrumentationwillbebasedonthefollowingthreecategoriesofICCinstruments:1.Sensorinstrumentationwithinthepressurevessel.2.Instrumentationcomponentsandsystemswhichextendfromtheprimarypressureboundaryuptoandincludingtheprimarydisplayisolatorandincludingthebackupdisplays.3.Instrumentationsystemswhichcomprisetheprimarydisplay~equipment.Thein-vesselsensorsrepresentthebestequip'mentavailableconsistentwithqualification'andschedular:requirements(asperNUREG-0737,AppendixB).Designoftheequipmentwillbeconsistentwithcurrentin-dustrypracticesin'thisarea.Specifically,instrumentationwillbedesignedsuchthattheymeetappropriatestresscriteriawhensubjectedtonormalanddesignbasisaccidentloadings.Seismicqualificationtosafeshutdownconditionswillverifyfunctionafterbeingsubjectedtotheseismicloadings.Theout-of-vesselinstrumentationsystem,uptoandincludingtheprimarydisplayisolator,andthebackupdisplayswillbeenvironmentallyqualifiedinaccordancewithIEEE-323-1974.Plant-specificcontainmenttemperatureandpressuredesignprofileswillbeusedwhereappropriateinthesetests.ThisequipmentwillalsobeseismicallyqualifedaccordingtoIEEE-STD-344-1975.CEN-99(S),"SeismicQualificationofNSSSSuppliedInstrumentation Equipment,CombustionEngineering,Inc."(August1978)describesthemethodsusedtomeetthecriteriaofthisdocument.FPSLisevaluatingwhatisrequiredtoaugmenttheout-.of-vesselClass1EinstrumentationequipmentqualificationprogramtoNUREG-0588.ConsistentwithAppendix.BofNUREG-0737,theout-of-vesselequipmentunder.procurementisthebestavailableequipment.FPLexpectstocompletethisevaluationbytheendofthefirstquarterof1982.RevisiontoSection6.2PROTOTYPETESTINGThePhase3testprogramwillconsistofhightemperatureandpressuretest-ingofthemanufactuiedprototypesystemHJTCprobeassemblyandprocessingelectronics.Verificationof,theHJTCsystemprototypewillbethegoalofthistestprogram.ThePhase3testprogramisexpected,tobecompletedbytheendofthefirstcharterof1982.RevisiontoSetion9.0SCHEDULEFOR'ICCINSTRUMENTATION"INSTALLATION'EFlordiaPowerandLightisactivelypursuing,procuringandexpeditingequipmentnecessary.toimplementrequirementsforTHIitemII.F.2,"InstrumentationforInadequateCoreCooling".However,thiscommitmentispredicateduponmanufacturersand.vendorsmeetingtheirscheduleddeliverypromises.WhenfirmschedulesaredevelopedFPLwillinformNRCofthemostprobableimplementationdate.
whichwastransmitted inaletterfromK.P.Baskin(Chair-manC-EOwnersGroup1toD.M.Crutchfield datedSeptember 15,1981.Thatletteralsotransmitted CEN-185,Documentation ofInadequate CoreCoolingInstrumentation forCombustion Engineering Nuclear.SteamSupplySystems",
APPENDIX1.9BSection10WillBeDeleted ReplacementTableI.9B-2TABLE'1.9B-2EVALUATIONOFICC'DETECTIONINSTRUMENTATIONTODOCUMENTATIONREUIREMENTSOFNUREG-0737ITEMII.F.2ITEM-RESPONSE1oa~l.b.DescriptionoftheICCDetectionInstrumentationisprovidedinSection3.0.Theinstrumentationtobeaddedincludes'.themodifiedSMM,theHJTCProbeAssemblies,andImprovedICI(CET)DetectorAssemblies./TheinstrumentationdescribedinSection2.0'illbetheICCdetectioninstrumentationdesignforFPL.lac~TheplannedmodificationstotheexistingUnit2instrumentationwillbemadepriortofuelload.ModificationsincludechangestotheSMM,design,procurementandinstallationoftheHJTCprobeassemblies,andimprovedICIDetectorAssemblies(whichnecessitateinstallationofimprovedICINozzleFlanges).ThefinalICCDetectionInstrumentation.willbeasdescribedinSec-tion3.0.2.ThedesignanalysisandevaluationoftheICCDetectionInstru-mentationisdiscussedinSections2.0and4.0.andAppendixA.Testingisdiscussedin.Section6.0.3.TheHJTCShasoneremainingtestphase.ThePhase3testprogramwillconsistofhightemperatureandpressuretestingofamanufacturedproductionprototypesystemHJTCprobeas-semblyandprocessingelectronics.ThePhase3testprogramwillbeexecutedattheC-EtestfacilityusedforthePhase2testandisexpectedtobecompletedbythefirstquarterof1982.NospecialverificationorexperimentaltestsareplannedforthehotlegandcoldlegRTDsensors,thepressurizerpressuresensors,ortheTypeK(chromel-alumel)coreexitthermocouplessincetheyarestandardhighqualitynuclearinstrumentswithwellknownresponses.Forqualificationtesting,allout-of-vesselsensorsandequip-ment,includingtheQSPDSuptoandincludingtheisolationtotheSAS,willbeenvironmentallyqualifiedtoIEEStd.323-1974asinterpretedtoCENPD-255Rev.Ol,"QualificationofC-EInstru-"ments",asinterpretedbyCENPD-182,andseismically,qualifiedtoIEEESTd.344-1975,"SeismicQualificationofC-EInstrumen-tationEquipment".ThequalificationtoNUREG-0588isbeingaddressedbytheC-EOwners'roup(Seetheresponsetoitem1inTable3formoreinformation).
whichisapplicable totheSt.Lucie-2ICC.instrumentation.
Table1.9B-2Continued4~Necessaryaugmentingofoutofvesselclass1EinstrumentationtoNUREG-0588requirementswillbeaddressedbytheFPLevala-tiontobecompletedbytheendofthefirstquarterof1982.ThistableevaluatestheICCDetectionInstrumentation'scon-formancetotheNUREG-0737,ItemII.F.2documentationrequire-ments.Table1.9B-3evaluatedconformancetoAttachement1ofItemII.F.2Table1.9B-4evaluatesconformancetoAppendixBofNUREG-0737.5.TheICCdetectioninstrumentationprocessinganddisplaycon-sistsoftwocomputersystems;the2redundantchannelsafetygrademicrocomputerbasedQSPDS,andtheSAS.TheICCinputsareacquiredandprocessedbythesafetygradeQSPDSandisolatedandtransmittedtothe.primarydisplayintheSAS.TheQSPDSalsohastheseismicallyqualifiedbackupdisplaysfortheICCdetectioninstruments.ThesoftwarefunctionsforprocessingarelistedinSection3.2,thefunctionsfordisplayarelistedinSection3.3.ThesoftwarefortheQSPDSisbeingdesignedconsistenttotherecommendationsofthedraftstandard,IEEEstd.P742/ANS4.3.2,"CriteriafortheApplicationofProgrammableDigitalComputerSystemsintheSafetySystemsofNuclearPowerGener-atingStations".ThisdesignprocedureverifiesandvalidatesthattheQSPDSsoftwareisproperlyimplementedandintegratedwiththesystemhardwaretomeetthesystem'sfunctionalrequire-ments.ThisprocedureisqualityassuredbymeansoftheC-EQADP;SinceC-Ehasdesignedtheonlylicensedsafetygradedigitalcomputersysteminthenuclearindustry,C-Ehasthefacilitiesandexperiencetodesignreliablecomputersystems.TheQSPDShardwareisdesignedasaredundantsafetygradequalifiedcomputersystemwhichisdesignedtotheunava'il-abilitygoalof0.01withtheappropriatesparepartsandmain-tenancesupport.6.Section9.0discussesthescheduleforinstallationandimple-mentationofthecompleteICCDetectionInstrumentation.7.GuidelinesforuseoftheICCDetectionInstrumentation"arediscussedinSection7.0.AfutureamendmentwilldiscusskeyoperatoractionsinthecurrentemergencyproceduresforICC.Theammendmentwillbesubmittedpriortofuelload.Section7.0discussestheemer-gencyprocedurestobeimplementeduponincorporationofthecompleteICCDetectionSystem, Table1.9B-2Continued9.ThefollowingdescribesadditionalsubmittalsthatwillbeprovidedtosupporttheacceptabilityofthefinalICCDetec-tionInstrumentation.1)Environmental'andSeismicQualificationoftheinstru-mentationequipment.AdditionalevaluationtoNUREG-~0588willbeprovidedbyJune1982.2)Modificationstoemergencyprocedures(priortofuelload)3),ChangestoTechnicalSpecifications(priortofuelload)
Question14:4Describehowtheprocessor testsoperateto'etermine thatthe.sensoroutputsarewithinrange.Howaretherangesselectedf
TABLE'.'B-3EVALUATIONOFICC'DETECTIONINSTRUMENTATIONTOATTACHMENT1ofII.F.2ITEMRESPONSESt.Lucie2has56coreexitthermocouples(CETs)distributeduniformlyoverthetopofthecore,Section3.1.3hasadis-criptionoftheCETsensors,Figure1.9B-7depictsthelocationsoftheCETs.2.",TheSASmeetstheprimarydisplayrequirementsforCETtem-peiatures.2~'a~AspatialCETtemperaturemapisavailableondemand.2.b.AselectiverepresentativeCETtemperaturewillbedisplayedcontinuouslyondemand.Althoughnotfinalized,thistempera-turewillbeeitherthemaximumCETtemperatureortheaverageofthefivehighestCETtemperatures.2~c~,2.d.TheSASprovidesdirectreadoutofCETtemperaturewithade-dicateddisplaypage.Thelineprinterprovidesthehardcopy.capability'forrecordingCETtemperatures.ATheSAShasanextensivetrendandhistoricaldatastorageandretrievalsystem.ThehistoricaldatastorageandretrievalsystemfunctionallowsallICCinputstoberecorded,stored,andrecalledbytheoperator.The:operator(andotheruserstations)can'graphicallytrendanyCETvalueonthedisplayscreen.AdedicatedICCtrendpagewhichincludestherepresentativeCETtemperatureandrepresentativeCETsaturationmarginwillbeaccessibletotheusers.2~e~TheSAShasalarmcapabilitiesandvisuallydisplayedvaluealarmsonthesystemlevelpages.2.f.TheSASis.anextensivelyhuman-factordesigneddisplaysystemwhichallowsquickaccesstorequesteddisplays.3~ICCinstrumentationQSPDSdesignincorporatesaminimumofonebackupdisplaywiththecapabilityofselectivereadingofaminimumof16operableThermocouples,4fromeachquadrant.AllCETtemperaturescanbedisplayedwithin5minutes.4.5~Thetypesandlocationsofdisplaysandalarmsaredeterminedfor,theprimarydisplaybyperformingahuman-factorsanalysis.TheQSPDSalsoincorporateshumanfactorsengineering.Theuseofthesedisplaysystemswillbeaddressedinoperatingproce-dures,emergencyprocedures,andop'eratortraining.TheICCinstrumentationwasevaluatedforconformancetoAppendixBofNUREG-0737(seeTable1.9B-4).
 
Table1.9B-3Continued6.TheQSPDSchannelsareClasslE,electricallyindependent,energizedfromindependentstationClasslEpowersourcesandphysically.separatedinaccordancewithRegulatoryGuide1..75"PhysicalIndependenceofElectricSystems"January1975(Rl)uptoandincludingtheisolationdevices.7~ICCinstrumentationshallbeenvironmentallyqualifiedpursuanttoC-Eownersgroupqualificationprogram.Theisolationde-vicesintheQSPDSareaccessibleformaintenancefollowinganaccident.8.Primaryandbackupdisplaychannelsaredesignedtoprovidethehighestavailabilitypossible.TheQSPDS.isdesignedtoprovide99%availability.TheavailabilityoftheQSPDSwillbeaddressedintheTechnicalS'pecifications.9.ThequalityassuranceprovisionsofAppendixB,Item5,willbeappliedtotheICCdetectioninstrumentsasdescribedintheAppendixBevaluationinTable1.9B-4.
===Response===
RevisiontoTable1-9B-4ITEMRESPONSE5.1.144"AuditingofQualityAssuranceProgramsforNuclearPowerPlants"..6.TheICCdetectioninstrumentationoutputsarecontinuouslyavail-ableontheQSPDSdisplaysthroughmanualcallupofdisplays.throughmanualcallupof'displays.Additionally,onechannelofanalogtrend,,;recordingwillcontinuouslyindicatetheICCsummaryvariables.~7.TheICCinstrumentationisdesignedtoprovidereadoutdisplayandtrendinginformationtotheopeartorthroughtheSASandanalogtrendrecordingoftheICCsummaryvariables.(SeeSection3.3);8.Theinadequate.corecoolinginstrumentationisspecificallyandsingularlyidentifiedsothattheoperatorcaneasilydiscerntheiruseduringanaccidentcondition.9.TransmissionofsignalsfrominstrumentsofassociatedsensorsbetweenredundantIEchannelsorbetween1Eandnon-1Einstru-mentchannelsareisolatedwithisolationdevicesqualifiedtotheprovisionsofAppendixB.10.TheQSPDSconsistsoftworedundantchannelstoavoidinter-ruptionsofdisplayduetoasinglefailure.IfintheremotechancethatonecompleteQSPDSchannelfails,theoperatorhas:1)AdditionalchannelsofICCsensorinputsforcoldlegtemperature,hotlegtemperature,andpressuizerpres-sureonthecontrolboardseparatefromtheQSPDS.'2)TheHJTCSandCEThavemultiplesensorsineachchannelfortheoperatortocorrelateandcheckinputs.3)TheHJTCSsensoroutputmaybetestedbytheoperatorreadingthetemperatureoftheunheatedthermocoupleandcomparingtoothertemperatureindications.4)OthervariablesareavailabletotheoperatorontheMainControlBoardforverifyingtheICCparameter.Servicing,testingandcalibratingprogramsshallbeconsis-tent-withoperatingtechnicalspecifications.12.13.TheICCinstrumentation,includingtheQSPDS,arenotintendedtoberemovedorbypassedduringoperation.Administrativecontrolwillbenecessarytoremovepower,fromachannel.Thesystemdesignissu'chastofacilitateadministrativecontrol'ofaccesstoallsetpointsadjustments,calibrationadjustmentsandtestpoints.
Analogsignalsareconverted todigitalformthrougha12bitresolution A/Dconverter.
RevisiontoTable1.9B-4Continued14.TheQSPDSisdesignedtominimizeanomalousindicationstotheoperator(seesection3.3).15.Instrumentationisdesignedtofacilitatereplacementofcom-ponentsormodules.Thei'nstrumentationdesignissuchthatmalfunctioningcomponentscanbeidentifedeasily.16.Thedesignincorporatesthisrequirementtotheextentprac-tical.17.Thedesignincorporatesthisrequirementtotheextentprac-tical.18.Thesystemisdesignedtobecapableofperiodictestingofinstrumentchannels.}}
Theinputelectrical rangesarepreprogrammed to0-10V,1-5V,4-20ma,10-50ma,andarangesuitableforTypeKthermocouples.
Functionally, theanalogsignalsarefirstconverted intovolts,thenscaledtoengineering units.Theinputvariableisthencomparedtoupperandloweroutofrangevaluestodetectoutofrangeinputs.Ifthevariableisoutofrange,thedisplaywillclearlyidentifythevariableasoutofrange.Theoutofrangevariables willbeeliminated fromalgorithms.
Question15:Describethedisplaymeasurement units.Response:
TheprimaryICCdisplaywillbeintheCriticalFunctionMonitoring System.However,theQSPDSdisplaywillpresentthemeasuredvariables inengineering units.Theengineering unitswillbeinunitsmostdirectlydescribiqg theprocess.FortheICCdetection variables, thefollowing unitswillbeused:FUNCTION1.Saturation/Subcooled MarginInputsUNITS-'FofPSIA(subcooled orsuperheat)
-'ForPSIA2.ReactorVesselLevelAbovetheCoreInputs-%heightabovethecoreanddiscreteleveldisplaysoF3.CoreExitThermocouple Temperature oF Question16:Describewhichparameter orparameters wouldneedtobecalculated fromthesensorinputs.Thedescription oftheQSODSimpliesthatsuchacalculation mightormightnotberequired.
Whenwoulditberequired'hen woulditnotberequiredl
 
===Response===
Thefollowing ICCdetection parameters orvariables requirecalculation fromsensorinputs:1.Saturation orsubcooled margin-Themaximumofthetemperature inputsandtheminimumofthepressureinputsarecomparedtothesaturation temperature or'ressure todetermine thetemperature andpressuremargintosaturation.
Superheat will.becalculated uptothedifference betweentherangeoftheinputsandthesaturation temperature.
2.Reactorvessellevelabovethecore-TheHJTCsensordif-ferential temperature andtheunheatedtemperature arecomparedto,setpoints todetermine ifaliquidcoveredoruncovered con-ditionexistsateachsensorlocation.
Thecorresponding leveloutputisdirectlyrelatedtothenumberofsensorsthatdetectliquidoranuncovered state.3.Representative coreex'it".thermocouple temperature
-Atem-peraturewillbecalculated torepresent thenumberofcoreexitthermocouple temperatures acrossthecore.Thiscalcula-tionhasnotbeendetermined yet.Itisanticipated tobeanaveragecalculation suchastheaveraging ofthefivehighesttemperatures.
Question17:Response:
Specifically, describetheautomatic on-linesurveillance tests.Thefollowing on-linesurveillance testsareperformed intheQSPDS:1.Thetemperature insidetheQSPDScabinetwithacoolingsystemalarmonhightemperature.
2.Powerfailuretotheprocessor withalarmonfailure.3.Badsensorsandbrokencommunication linkswithindication onthedisplay.4.CPUmemory'heck anddatacommunication checkswithalarmandindication ontheplasmadisplayanddigitalpanelmeteronthecabinet.(Thesechecksareperformed periodically.)
5.Alaloginputoffsetvoltagewithcompensation performed automatically.
6.Inputsoutofrangewithalarm(seeQuestion14).7.LowHJTCSdifferential temperature withalarm.
Question18:Describethemanualon-linediagnostic capability andprocedures.
 
===Response===
Theautomatic on-linesurveillance testsreplacetheneedforamanualinitiated on-lineoroff-linediagnostic testtobeper-for'medbythe,computer.
Apagedisplaying thestatusoftheautomatic surveillance testswillbeprovidedtoaidoperatordiagnostics.
Additionally, thefollowing manualtestcapabilities areincludedinthedesign:1.Calibration oftheA/D'boards (withautomatic offsetvoltagecompensation).
2.Resetofthesystem.Question19:Discussthepredetermined setpointfortheheatedjunctionther-mocouplesignalsandhowitwillbeselected.
 
===Response===
Asetpointoneachoftwoinputsdetermines thepresenceorabsenceofliquidateachHJTCsenorlocation:
1.Differential temperature betweentheunheatedandheatedHJTCjunctions, and2.UnheatedHJTCjunctiontemperature.
Wheneitherofthesetwoinputtemperatures exceedsthesetpointfortherespective inputtemperature, thelogicindicates thattheli'quidlevelhasdroppedtoalevellowerthanthesensorlocation.
Thesetpointvaluesarepredetermined andareinstalled aspartofthelevellogicsoftware.
Thedifferential temperature setpointiscalculated (basedontests)tobelowenoughtoobtainagoodresponsetimebuthighenoughtoassureliquidisnotpresent.Theunheatedjunctiontemperature setpointiscalculated toassurethatliquidisnotpresentatthesensorposition.
ATTACHMENT
."B"DraftResponses toAppendix1.9B Section3.1.1Replacement 3.1.1SATURATION MARGINSaturation MarginMonitoring (SMM)providesinformation tothereactoroperatoron(1)theapproachtoandexistence ofsaturation and(2)existence o'fcoreuncovery.
TheSMMincludesinputsfromRCScoldandhotlegtemperatures measuredby"RTDs,thetemperature ofthemaximumofthetopthreeUnheatedJunctionThermocouples (UHJTC),representative coreexittemperature, andpressurizer pressuresensors.TheUHJTCinputcomesfromtheoutputoftheHJTCSpro-cessingunits.Insummary,'he sensorinputsare'asfollows:~1nnt~RenePressurizer PressureColdLegTemperature HotLegTemperature MaximumUHJTCTemperature oftopthreesensors(fromHJTCprocessing) 0-3000p5ia0-710'F0-710'F200-2300'F Representative CETTemperature 200-2300'F 3.2DESCRIPTION OFICCPROCESSING Thefollowing sectionsprovideapreliminary description oftheprocessing controlanddisplayfunctions associated witheachoftheICCdetection instru-mentsintheAMS.ThesensorinputsforthemajorICCparameters; satura-tionmargin,reactorvesselinventory/temperature abovethecore,andcoreexittemperature areprocessed inthetwochannelQSPDSandtransmitted totheSafety'ssessment Systemforprimarydisplayandtrending.
3.2.1SATURATION MARGINTheQSPDSprocessing equipment willperformthefollowing saturation marginmonitoring functions:
1.Calculate thesaturation marginThesaturation temperature iscalculated fromtheminimumpressureinput.Thetemperature subcooled orsuperheat marginisthedifference betweensaturation temperature andthesensortemperature input.Threetemperatures subcooled orsuperheat marginpresentations willbeavail-able.Theseareasfollows:
a.RCSsaturation margin-thetemperature saturation marginbased,onthedifference betweenthesaturation temperature andthemaximumtemperature fromtheRTDsinthehotandcoldlegs.b.Upperheadsaturation margin-temperature saturation marginbasedonthedifference betweenthesaturation temperature andtheUHJTCtemperature (basedonthemaximumofthetopthree,UHJTC).CsCETsaturation margin-temperature saturation marginbasedthedifference betweenthesaturation temperature andtherepresenta-tioncoreexit,temperature calculated fromtheCETs(Section2.2.3).2.Processsensoroutputsfordetermination oftemperature saturation margin.3.Provideanalarmoutputforan.annunciator whentemperature saturation marginreachesapreslected setpoint(expected tobewithinO'Fto'0'Fsubcool'ed) forRCSorupperheadsaturation margin.CETsatura-tionmarginisnotalarmedtoavoidpossiblespuriousalarms.32'HEATEDJUNCTIONTHEMOCOUPLE ThegSPDSprocessing equipment performsthefollowing functions fortheHJTC:r1.Determine collapsed liquidlevelabovecore.Theheatedandunheatedthermocouples intheHJTCareconnected insuchawaythatabsoluteanddifferential temperature signalsareavailable.
ThisisshowninFigure2-6.Whenliquid~atersurrounds thethermocouples, theirtemperature andvoltageoutputsareapproxi-matelyequal.ThevoltageV(AC),onFigure2-6istherefore, approxi-matelyzero.lntheabsenceofliquid,thethermocouple temperatures".and outputvoltagebecomeunequal,causingVgACqto:rise.WhenVoftheindividual HJTCrisesaboveapredetermined
: setpoint, liquidinventory doesnotexistatthisHJTCposition.
2.Determine themaximumupperplenum/head fluidtemperature ofthetopthreeunheatedthermocouples foruseasanoutputtotheSMMcalcula-.
tion.(Thetemperature processing rangeisfrom100'Fto2300'F).3.Processinputsignalstodisplaycollapsed liquidlevelandunheatedjunctionthermocouple temperatures.
4.Provideanalarmoutput'whenanyoftheHJTCdetectstheabsenceofliquidlevel.
5.ProvidecontrolofheaterpowerforproperHJTCoutputsignallevel.Figure2-7showsthedesignforoneofthetwochannelswhichincludestheheatercontroller powersupplies.
3.2.3COREEXITTHERMOCOUPLE SYSTEMTheQSPDSperformsthefollowing CETprocessing functions:
1.Processcoreexit:thermocouple inputsfordisplay.2.Calculate arepresentative coreexittemperature.
.Although notfinal-ized,thistemperature willbeeitherthemaximumvalidcoreexittemperature ortheaverageof.thefivehighestvalidcoreexittem-peratures.
3.Provideanalarmoutputwhentemperature reachesapreselected value.I4.ProcessCETsfordisplayofCETtemperature andsuperheat.
Thesefunctions areintendedtomeetthedesignrequirements ofNUREG-0737, II.F.2.Attachment l.3.3SYSTEMDISPLAY,TheICCdetection instrumentation displaysinboththeSAS(primarydisplays) andtheQSPDS(backupdisplays) haveanICCsummarypageaspartofthecore.heatremovalcontrolcriticalfunctionsupported bymoredetaileddisplaypagesforeachoftheICCvariablecategories.
Thesummarypagewillinclude:1.RCS/Upper Headsaturation margin-themaximumoftheRCSandUpp'erHeadsaturation margin.2.Reactorvessel.levelabovethecore.3.Representative coieexittemperature.
ISincetheSAShasmoredisplaycapabilities thantheQSPDSsuchascol,or-graphics,
: trending, andalargerformat,additional information maybeaddedandwithabetterpresentation thanisavailable withtheQSPDS.Thesevariables areincorporated inotherSASsystemdisplays.
SincetheSASreceivesbothQSPDSchannelsofICCinput,theSASdisplaysbothchannelsofICCinformation.
TheQSPDSdisplaysonlyonechannelofICCinformation foreachvideodisplayunit.  
.Althoughallinputsareaccessible fortrendingandhistorical recall,theSAShasadedicated ICCtrendpageforRCS/upper headsaturation margin,reactorvessellevel,andrepresentative coreexittemperature andcoreexitsaturation margin.Thesearealsoavailable asanalogoutputsfromtheQSPDScabinet.tEachQSPDSsafetygradebackupdisplayalsohasavailable themostreliablebasicinformation foreachoftheICCinstruments.
Thesedisplaysarehumanengineered togive.theoperatorclear'nambiguous indications.
Thebackupdisplaysaredesigned:
1.Togiveinstrument indications intheremotechancethattheprimary'isplaybecomesinoperable.
2.Toprovideconfirmatory indications.
totheprimarydisplay.3.Toaidin'surveillance testsanddiagnostics.
Thefollowing sectionsdescribedisplaysaspresently conceived foreachoftheICCinstrument systems.Bothprimaryandbackupdisplaysarein-tendedtobedesignedconsistent withthecriteriainII.F.2Attachment 1andAppendixB.3.3.1.*SATURATION MARGINDISPLAYThefollowing information-ispresented ontheprimarySASandbackup(QSPDS)displays:
Temperature andpressuresaturation marginsforRCS,UpperHead,CoreExitTemperature.
2.Temperatures andpressureinputs.3.3.2HEATEDJUNCTIONTHERMOCOUPLE SYSTEMDISPLAYThefollowing information isdisplayed ontheCFMSandQSPDSdisplays:
Liuqidinventory levelabovethefuelalignment platederivedfromtheeightdiscreteHJTCpositions.
2.8discreteHJTCpositions indicating liquidinventory abovethefuelalignment plate.3.,InputsfromtheHJTCS:a.Unheated)unctiontemperature atthe8positions.
b.Heated)unctiontemperature atthe8positions.
c.Differential junctiontemperature atthe8positions.
2.3.4.COREEXITTHERMOCOUPLE'DISPLAY Thefollowing information isdisplayed ontheSASdisplay:Aspatially orientedcoremapindicating thetemperature ateachoftheCET's.2.Aselective re'adingofCETtemperatures.
3.Therepresentative coreexittemperature.
Thefollowing information isdisplayed ontheQSPDSdisplay:2.Representative.
coreexittemperature.
~Aselective readingoftheCETtemperatures (twohighesttempera-turesineachquadrant) 3.Alistingofallcoreexittemperatures.
Replacement Section5.0.SYSTEMUALIFICATION Thequalification programforSt.Lucie-2ICC.instrumentation willbebasedonthefollowing threecategories ofICCinstruments:
1.Sensorinstrumentation withinthepressurevessel.2.Instrumentation components andsystemswhichextendfromtheprimarypressureboundaryuptoandincluding theprimarydisplayisolatorandincluding thebackupdisplays.
3.Instrumentation systemswhichcomprisetheprimarydisplay~equipment.
Thein-vessel sensorsrepresent thebestequip'ment available consistent withqualification
'andschedular:
requirements (asperNUREG-0737, AppendixB).Designoftheequipment willbeconsistent withcurrentin-dustrypractices in'thisarea.Specifically, instrumentation willbedesignedsuchthattheymeetappropriate stresscriteriawhensubjected tonormalanddesignbasisaccidentloadings.
Seismicqualification tosafeshutdownconditions willverifyfunctionafterbeingsubjected totheseismicloadings.
Theout-of-vessel instrumentation system,uptoandincluding theprimarydisplayisolator, andthebackupdisplayswillbeenvironmentally qualified inaccordance withIEEE-323-1974.
Plant-specific containment temperature andpressuredesignprofileswillbeusedwhereappropriate inthesetests.Thisequipment willalsobeseismically qualifedaccording toIEEE-STD-344-1975.CEN-99(S),
"SeismicQualification ofNSSSSuppliedInstrumentation Equipment, Combustion Engineering, Inc."(August1978)describes themethodsusedtomeetthecriteriaofthisdocument.
FPSLisevaluating whatisrequiredtoaugmenttheout-.of-vessel Class1Einstrumentation equipment qualification programtoNUREG-0588.
Consistent withAppendix.B ofNUREG-0737, theout-of-vessel equipment under.procurement isthebestavailable equipment.
FPLexpectstocompletethisevaluation bytheendofthefirstquarterof1982.RevisiontoSection6.2PROTOTYPE TESTINGThePhase3testprogramwillconsistofhightemperature andpressuretest-ingofthemanufactuied prototype systemHJTCprobeassemblyandprocessing electronics.
Verification of,theHJTCsystemprototype willbethegoalofthistestprogram.ThePhase3testprogramisexpected, tobecompleted bytheendofthefirstcharterof1982.RevisiontoSetion9.0SCHEDULEFOR'ICCINSTRUMENTATION"INSTALLATION
'EFlordiaPowerandLightisactivelypursuing, procuring andexpediting equipment necessary.to implement requirements forTHIitemII.F.2,"Instrumentation forInadequate CoreCooling".
However,thiscommitment ispredicated uponmanufacturers and.vendors meetingtheirscheduled deliverypromises.
Whenfirmschedules aredeveloped FPLwillinformNRCofthemostprobableimplementation date.
APPENDIX1.9BSection10WillBeDeleted Replacement TableI.9B-2TABLE'1.9B-2 EVALUATION OFICC'DETECTION INSTRUMENTATION TODOCUMENTATION REUIREMENTS OFNUREG-0737 ITEMII.F.2ITEM-RESPONSE1oa~l.b.Description oftheICCDetection Instrumentation isprovidedinSection3.0.Theinstrumentation tobeaddedincludes'.the modifiedSMM,theHJTCProbeAssemblies, andImprovedICI(CET)DetectorAssemblies.
/Theinstrumentation described inSection2.0'illbetheICCdetection instrumentation designforFPL.lac~Theplannedmodifications totheexistingUnit2instrumentation willbemadepriortofuelload.Modifications includechangestotheSMM,design,procurement andinstallation oftheHJTCprobeassemblies, andimprovedICIDetectorAssemblies (whichnecessitate installation ofimprovedICINozzleFlanges).
ThefinalICCDetection Instrumentation.
willbeasdescribed inSec-tion3.0.2.Thedesignanalysisandevaluation oftheICCDetection Instru-mentation isdiscussed inSections2.0and4.0.andAppendixA.Testingisdiscussed in.Section6.0.3.TheHJTCShasoneremaining testphase.ThePhase3testprogramwillconsistofhightemperature andpressuretestingofamanufactured production prototype systemHJTCprobeas-semblyandprocessing electronics.
ThePhase3testprogramwillbeexecutedattheC-EtestfacilityusedforthePhase2testandisexpectedtobecompleted bythefirstquarterof1982.Nospecialverification orexperimental testsareplannedforthehotlegandcoldlegRTDsensors,thepressurizer pressuresensors,ortheTypeK(chromel-alumel) coreexitthermocouples sincetheyarestandardhighqualitynuclearinstruments withwellknownresponses.
Forqualification testing,allout-of-vessel sensorsandequip-ment,including theQSPDSuptoandincluding theisolation totheSAS,willbeenvironmentally qualified toIEEStd.323-1974asinterpreted toCENPD-255 Rev.Ol,"Qualification ofC-EInstru-"ments",asinterpreted byCENPD-182, andseismically, qualified toIEEESTd.344-1975, "SeismicQualification ofC-EInstrumen-tationEquipment".
Thequalification toNUREG-0588 isbeingaddressed bytheC-EOwners'roup (Seetheresponsetoitem1inTable3formoreinformation).
Table1.9B-2Continued 4~Necessary augmenting ofoutofvesselclass1Einstrumentation toNUREG-0588 requirements willbeaddressed bytheFPLevala-tiontobecompleted bytheendofthefirstquarterof1982.Thistableevaluates theICCDetection Instrumentation's con-formancetotheNUREG-0737, ItemII.F.2documentation require-ments.Table1.9B-3evaluated conformance toAttachement 1ofItemII.F.2Table1.9B-4evaluates conformance toAppendixBofNUREG-0737.
5.TheICCdetection instrumentation processing anddisplaycon-sistsoftwocomputersystems;the2redundant channelsafetygrademicrocomputer basedQSPDS,andtheSAS.TheICCinputsareacquiredandprocessed bythesafetygradeQSPDSandisolatedandtransmitted tothe.primarydisplayintheSAS.TheQSPDSalsohastheseismically qualified backupdisplaysfortheICCdetection instruments.
Thesoftwarefunctions forprocessing arelistedinSection3.2,thefunctions fordisplayarelistedinSection3.3.ThesoftwarefortheQSPDSisbeingdesignedconsistent totherecommendations ofthedraftstandard, IEEEstd.P742/ANS4.3.2,"Criteria fortheApplication ofProgrammable DigitalComputerSystemsintheSafetySystemsofNuclearPowerGener-atingStations".
Thisdesignprocedure verifiesandvalidates thattheQSPDSsoftwareisproperlyimplemented andintegrated withthesystemhardwaretomeetthesystem'sfunctional require-ments.Thisprocedure isqualityassuredbymeansoftheC-EQADP;SinceC-Ehasdesignedtheonlylicensedsafetygradedigitalcomputersysteminthenuclearindustry, C-Ehasthefacilities andexperience todesignreliablecomputersystems.TheQSPDShardwareisdesignedasaredundant safetygradequalified computersystemwhichisdesignedtotheunava'il-abilitygoalof0.01withtheappropriate sparepartsandmain-tenancesupport.6.Section9.0discusses thescheduleforinstallation andimple-mentation ofthecompleteICCDetection Instrumentation.
7.Guidelines foruseoftheICCDetection Instrumentation "arediscussed inSection7.0.Afutureamendment willdiscusskeyoperatoractionsinthecurrentemergency procedures forICC.Theammendment willbesubmitted priortofuelload.Section7.0discusses theemer-gencyprocedures tobeimplemented uponincorporation ofthecompleteICCDetection
: System, Table1.9B-2Continued 9.Thefollowing describes additional submittals thatwillbeprovidedtosupporttheacceptability ofthefinalICCDetec-tionInstrumentation.
1)Environmental
'andSeismicQualification oftheinstru-mentation equipment.
Additional evaluation toNUREG-~0588willbeprovidedbyJune1982.2)Modifications toemergency procedures (priortofuelload)3),ChangestoTechnical Specifications (priortofuelload)
TABLE'.'B-3EVALUATION OFICC'DETECTION INSTRUMENTATION TOATTACHMENT 1ofII.F.2ITEMRESPONSESt.Lucie2has56coreexitthermocouples (CETs)distributed uniformly overthetopofthecore,Section3.1.3hasadis-criptionoftheCETsensors,Figure1.9B-7depictsthelocations oftheCETs.2.",TheSASmeetstheprimarydisplayrequirements forCETtem-peiatures.
2~'a~AspatialCETtemperature mapisavailable ondemand.2.b.Aselective representative CETtemperature willbedisplayed continuously ondemand.Althoughnotfinalized, thistempera-turewillbeeitherthemaximumCETtemperature ortheaverageofthefivehighestCETtemperatures.
2~c~,2.d.TheSASprovidesdirectreadoutofCETtemperature withade-dicateddisplaypage.Thelineprinterprovidesthehardcopy.
capability
'forrecording CETtemperatures.
ATheSAShasanextensive trendandhistorical datastorageandretrieval system.Thehistorical datastorageandretrieval systemfunctionallows allICCinputstoberecorded, stored,andrecalledbytheoperator.
The:operator (andotheruserstations) can'graphically trendanyCETvalueonthedisplayscreen.Adedicated ICCtrendpagewhichincludestherepresentative CETtemperature andrepresentative CETsaturation marginwillbeaccessible totheusers.2~e~TheSAShasalarmcapabilities andvisuallydisplayed valuealarmsonthesystemlevelpages.2.f.TheSASis.anextensively human-factor designeddisplaysystemwhichallowsquickaccesstorequested displays.
3~ICCinstrumentation QSPDSdesignincorporates aminimumofonebackupdisplaywiththecapability ofselective readingofaminimumof16operableThermocouples, 4fromeachquadrant.
AllCETtemperatures canbedisplayed within5minutes.4.5~Thetypesandlocations ofdisplaysandalarmsaredetermined for,theprimarydisplaybyperforming ahuman-factors analysis.
TheQSPDSalsoincorporates humanfactorsengineering.
Theuseofthesedisplaysystemswillbeaddressed inoperating proce-dures,emergency procedures, andop'erator training.
TheICCinstrumentation wasevaluated forconformance toAppendixBofNUREG-0737 (seeTable1.9B-4).
Table1.9B-3Continued 6.TheQSPDSchannelsareClasslE,electrically independent, energized fromindependent stationClasslEpowersourcesandphysically.
separated inaccordance withRegulatory Guide1..75"Physical Independence ofElectricSystems"January1975(Rl)uptoandincluding theisolation devices.7~ICCinstrumentation shallbeenvironmentally qualified pursuanttoC-Eownersgroupqualification program.Theisolation de-vicesintheQSPDSareaccessible formaintenance following anaccident.
8.Primaryandbackupdisplaychannelsaredesignedtoprovidethehighestavailability possible.
TheQSPDS.isdesignedtoprovide99%availability.
Theavailability oftheQSPDSwillbeaddressed intheTechnical S'pecifications.
9.Thequalityassurance provisions ofAppendixB,Item5,willbeappliedtotheICCdetection instruments asdescribed intheAppendixBevaluation inTable1.9B-4.
RevisiontoTable1-9B-4ITEMRESPONSE5.1.144"Auditing ofQualityAssurance ProgramsforNuclearPowerPlants"..
6.TheICCdetection instrumentation outputsarecontinuously avail-ableontheQSPDSdisplaysthroughmanualcallupofdisplays.
throughmanualcallupof'displays.
Additionally, onechannelofanalogtrend,,;recording willcontinuously indicatetheICCsummaryvariables.
~7.TheICCinstrumentation isdesignedtoprovidereadoutdisplayandtrendinginformation totheopeartorthroughtheSASandanalogtrendrecording oftheICCsummaryvariables.
(SeeSection3.3);8.Theinadequate.
corecoolinginstrumentation isspecifically andsingularly identified sothattheoperatorcaneasilydiscerntheiruseduringanaccidentcondition.
9.Transmission ofsignalsfrominstruments ofassociated sensorsbetweenredundant IEchannelsorbetween1Eandnon-1Einstru-mentchannelsareisolatedwithisolation devicesqualified totheprovisions ofAppendixB.10.TheQSPDSconsistsoftworedundant channelstoavoidinter-ruptionsofdisplayduetoasinglefailure.IfintheremotechancethatonecompleteQSPDSchannelfails,theoperatorhas:1)Additional channelsofICCsensorinputsforcoldlegtemperature, hotlegtemperature, andpressuizer pres-sureonthecontrolboardseparatefromtheQSPDS.'2)TheHJTCSandCEThavemultiplesensorsineachchannelfortheoperatortocorrelate andcheckinputs.3)TheHJTCSsensoroutputmaybetestedbytheoperatorreadingthetemperature oftheunheatedthermocouple andcomparing toothertemperature indications.
4)Othervariables areavailable totheoperatorontheMainControlBoardforverifying theICCparameter.
Servicing, testingandcalibrating programsshallbeconsis-tent-withoperating technical specifications.
12.13.TheICCinstrumentation, including theQSPDS,arenotintendedtoberemovedorbypassedduringoperation.
Administrative controlwillbenecessary toremovepower,fromachannel.Thesystemdesignissu'chastofacilitate administrative control'ofaccesstoallsetpoints adjustments, calibration adjustments andtestpoints.
RevisiontoTable1.9B-4Continued 14.TheQSPDSisdesignedtominimizeanomalous indications totheoperator(seesection3.3).15.Instrumentation isdesignedtofacilitate replacement ofcom-ponentsormodules.Thei'nstrumentation designissuchthatmalfunctioning components canbeidentifed easily.16.Thedesignincorporates thisrequirement totheextentprac-tical.17.Thedesignincorporates thisrequirement totheextentprac-tical.18.Thesystemisdesignedtobecapableofperiodictestingofinstrument channels.}}

Revision as of 17:52, 29 June 2018

Forwards Response to Core Performance Branch Request for Addl Info Re Instrumentation to Detect Conditions of Inadequate Core Cooling.Updated Info in Response to 811019 Telcon Encl
ML17212A922
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 10/22/1981
From: UHRIG R E
FLORIDA POWER & LIGHT CO.
To: EISENHUT D G
Office of Nuclear Reactor Regulation
References
L-81-463, NUDOCS 8110280126
Download: ML17212A922 (22)
v • d • e


Text

REGULATOR rINFORMATION'ISTR'IBUTION bSTE<<l.(RIDS)ACCESSIOVi NBR:8110280126'OC,DATE(:

81/10/22NOTARIZED::

NOFACIL(:50 389St<+LuciePlantgUnit2~.FloridaPowerLLiightCo,,AUTH(.NAME(AUTHORAFFIL'IAT(ION UHRI9gR,E';Flor<idaPower((LightCo.RECIP~VARE(RECiIPZENT AFFIL<IATIO<V EiISE<VHUTrr DiG,,DivisionofLicensing

SUBJECT:

ForwardsresponsetoC'orePerformance(Branchrequest>>foriaddiinfore(instrumentation<

todetect"conditions ofinadequate core<cooling.Updated<

infoinresponsei to811019teilconiencl,DISTRIBUTION CODE(:80016COPIESRECEaVED:LiTRENCL(SIZE~:

T(ITLE(:..

-PSAR'/FSAR AMDT6andRe,latedCorre'spondence

<VOTES':".DOCKE(T0'5000389 RECIPEKNT'OrCODE/t<(AMKI ACTION::A/DrLiICEVSNG L<IC(BRi(r3LAINTERNAL(:'-ELO(HUR(FACiT'NG40,ILCISYSBR16'E'/EPDS(

35i*L<IC(GUIDBR"33iNATLE'VG,BR'7MPAlNRR</DE'/EQB 13iNRR'/DSI</ASB27iVRR'/OSIS'CSB 09OPLIC8Ri34PROC/TST'EV 20.ESSBR22'.REG<IL'4<VGBR'25<EXTERNALi:

ACR641>>FE('lAREPDIV39NRC(PDRI02!NT'ISCOPIESL<TTREiVCLr1010101111111111103II311111111111111161611111RECIPIENT IDCODE/NAME L(ICBR03BC<VERSESrV.

01GEOSCIENCES 28HYD'/GEOBR30I8Ei06'E'/EPLB,36'iIC'UALr BR32'ECH'<VG BR18NRR/DE/CEB, 11=NRR/DSIi/AEB26NRR/DSI/CPB 10iVRR/DSI"/ET<8812'OWERSYSBR19QA.BR21=-REAC<SYSBR23SIT<ANAL(BR2'4BiVL(AMD'TSONLY)LPDR<03VSIC05COPIEBLq'<TR(ENCL(10.122'2'3<33<11111111111111111111111VOV01SgJ>TO<TAL<VU4lBER(

OFCOPIES'EQUIRED!:

LiTTR63ENCL(58 ePI P.o.BOX529100MIAMI,FL33152kiA~4%FLORIDAPOWER&LIGHTCOMPANYOctober22,1981L-81-463OfficeofNuclearReactorRegulation Attention:

Mr.DarrellG.Eisenhut, DirectorDivisionofLicensing U.S.NuclearRegulatory Commission Washington, D.C.20555

DearMr.Eisenhut:

eE/((),Re:St.LucieUnit2DocketNo.50-389RequestsforAdditional Information InadeuateCoreCoolinInstrumentation AttachedisFloridaPower8LightCompany's

.'response toaCorePerformance Branchrequestforadditional information concerning instrumentation todetectconditions ofinadequate corecooling.Alsoattachedisadditional andupdatedinformation onthesame.subjectrequested bytheNRCstaffduringatelephone conversation onOctober19,1981betweenJ.Westhoven (C-E),R.Gritz(FPL),V.Nerses(NRC),andT.Huang(NRC).Theattachedinformation shouldcloseoutthisitemforSt.LucieUnit2.Shouldyouhaveanyadditional questions, pleasecallus.'erytrulyyours,ertE.UhrigVicePresident AdvancedSystems8Technology REU/TCG/ah Attachments cc:J.P.O'Reilly,

Director, RegionII(w/oattachments)

HaroldF.Reis,Esquire(w/oattachments) gooIBii0280i2h Sii02t~PDRADQCK050089)ADR/PEOPLE...

SERVINGPEOPLE PT~C~NTResponsetoNRCQuestions onInadequate CoreCoolingInstrumentation ATTACHMENT AResonsetoNRCestionsonInadeuateCoreCoolinInstrumentation (1'-13)Responses toquestions (1-13)wereresponded toonagenericbasisby'theC-EOwnersGroup.Theseresponses wereprovidedinCEN-181-P, "GenericResponses toNRCQuestions on.theC-EInadequate CoreCoolingInstrumentation",

whichwastransmitted inaletterfromK.P.Baskin(Chair-manC-EOwnersGroup1toD.M.Crutchfield datedSeptember 15,1981.Thatletteralsotransmitted CEN-185,Documentation ofInadequate CoreCoolingInstrumentation forCombustion Engineering Nuclear.SteamSupplySystems",

whichisapplicable totheSt.Lucie-2ICC.instrumentation.

Question14:4Describehowtheprocessor testsoperateto'etermine thatthe.sensoroutputsarewithinrange.Howaretherangesselectedf

Response

Analogsignalsareconverted todigitalformthrougha12bitresolution A/Dconverter.

Theinputelectrical rangesarepreprogrammed to0-10V,1-5V,4-20ma,10-50ma,andarangesuitableforTypeKthermocouples.

Functionally, theanalogsignalsarefirstconverted intovolts,thenscaledtoengineering units.Theinputvariableisthencomparedtoupperandloweroutofrangevaluestodetectoutofrangeinputs.Ifthevariableisoutofrange,thedisplaywillclearlyidentifythevariableasoutofrange.Theoutofrangevariables willbeeliminated fromalgorithms.

Question15:Describethedisplaymeasurement units.Response:

TheprimaryICCdisplaywillbeintheCriticalFunctionMonitoring System.However,theQSPDSdisplaywillpresentthemeasuredvariables inengineering units.Theengineering unitswillbeinunitsmostdirectlydescribiqg theprocess.FortheICCdetection variables, thefollowing unitswillbeused:FUNCTION1.Saturation/Subcooled MarginInputsUNITS-'FofPSIA(subcooled orsuperheat)

-'ForPSIA2.ReactorVesselLevelAbovetheCoreInputs-%heightabovethecoreanddiscreteleveldisplaysoF3.CoreExitThermocouple Temperature oF Question16:Describewhichparameter orparameters wouldneedtobecalculated fromthesensorinputs.Thedescription oftheQSODSimpliesthatsuchacalculation mightormightnotberequired.

Whenwoulditberequired'hen woulditnotberequiredl

Response

Thefollowing ICCdetection parameters orvariables requirecalculation fromsensorinputs:1.Saturation orsubcooled margin-Themaximumofthetemperature inputsandtheminimumofthepressureinputsarecomparedtothesaturation temperature or'ressure todetermine thetemperature andpressuremargintosaturation.

Superheat will.becalculated uptothedifference betweentherangeoftheinputsandthesaturation temperature.

2.Reactorvessellevelabovethecore-TheHJTCsensordif-ferential temperature andtheunheatedtemperature arecomparedto,setpoints todetermine ifaliquidcoveredoruncovered con-ditionexistsateachsensorlocation.

Thecorresponding leveloutputisdirectlyrelatedtothenumberofsensorsthatdetectliquidoranuncovered state.3.Representative coreex'it".thermocouple temperature

-Atem-peraturewillbecalculated torepresent thenumberofcoreexitthermocouple temperatures acrossthecore.Thiscalcula-tionhasnotbeendetermined yet.Itisanticipated tobeanaveragecalculation suchastheaveraging ofthefivehighesttemperatures.

Question17:Response:

Specifically, describetheautomatic on-linesurveillance tests.Thefollowing on-linesurveillance testsareperformed intheQSPDS:1.Thetemperature insidetheQSPDScabinetwithacoolingsystemalarmonhightemperature.

2.Powerfailuretotheprocessor withalarmonfailure.3.Badsensorsandbrokencommunication linkswithindication onthedisplay.4.CPUmemory'heck anddatacommunication checkswithalarmandindication ontheplasmadisplayanddigitalpanelmeteronthecabinet.(Thesechecksareperformed periodically.)

5.Alaloginputoffsetvoltagewithcompensation performed automatically.

6.Inputsoutofrangewithalarm(seeQuestion14).7.LowHJTCSdifferential temperature withalarm.

Question18:Describethemanualon-linediagnostic capability andprocedures.

Response

Theautomatic on-linesurveillance testsreplacetheneedforamanualinitiated on-lineoroff-linediagnostic testtobeper-for'medbythe,computer.

Apagedisplaying thestatusoftheautomatic surveillance testswillbeprovidedtoaidoperatordiagnostics.

Additionally, thefollowing manualtestcapabilities areincludedinthedesign:1.Calibration oftheA/D'boards (withautomatic offsetvoltagecompensation).

2.Resetofthesystem.Question19:Discussthepredetermined setpointfortheheatedjunctionther-mocouplesignalsandhowitwillbeselected.

Response

Asetpointoneachoftwoinputsdetermines thepresenceorabsenceofliquidateachHJTCsenorlocation:

1.Differential temperature betweentheunheatedandheatedHJTCjunctions, and2.UnheatedHJTCjunctiontemperature.

Wheneitherofthesetwoinputtemperatures exceedsthesetpointfortherespective inputtemperature, thelogicindicates thattheli'quidlevelhasdroppedtoalevellowerthanthesensorlocation.

Thesetpointvaluesarepredetermined andareinstalled aspartofthelevellogicsoftware.

Thedifferential temperature setpointiscalculated (basedontests)tobelowenoughtoobtainagoodresponsetimebuthighenoughtoassureliquidisnotpresent.Theunheatedjunctiontemperature setpointiscalculated toassurethatliquidisnotpresentatthesensorposition.

ATTACHMENT

."B"DraftResponses toAppendix1.9B Section3.1.1Replacement 3.1.1SATURATION MARGINSaturation MarginMonitoring (SMM)providesinformation tothereactoroperatoron(1)theapproachtoandexistence ofsaturation and(2)existence o'fcoreuncovery.

TheSMMincludesinputsfromRCScoldandhotlegtemperatures measuredby"RTDs,thetemperature ofthemaximumofthetopthreeUnheatedJunctionThermocouples (UHJTC),representative coreexittemperature, andpressurizer pressuresensors.TheUHJTCinputcomesfromtheoutputoftheHJTCSpro-cessingunits.Insummary,'he sensorinputsare'asfollows:~1nnt~RenePressurizer PressureColdLegTemperature HotLegTemperature MaximumUHJTCTemperature oftopthreesensors(fromHJTCprocessing) 0-3000p5ia0-710'F0-710'F200-2300'F Representative CETTemperature 200-2300'F 3.2DESCRIPTION OFICCPROCESSING Thefollowing sectionsprovideapreliminary description oftheprocessing controlanddisplayfunctions associated witheachoftheICCdetection instru-mentsintheAMS.ThesensorinputsforthemajorICCparameters; satura-tionmargin,reactorvesselinventory/temperature abovethecore,andcoreexittemperature areprocessed inthetwochannelQSPDSandtransmitted totheSafety'ssessment Systemforprimarydisplayandtrending.

3.2.1SATURATION MARGINTheQSPDSprocessing equipment willperformthefollowing saturation marginmonitoring functions:

1.Calculate thesaturation marginThesaturation temperature iscalculated fromtheminimumpressureinput.Thetemperature subcooled orsuperheat marginisthedifference betweensaturation temperature andthesensortemperature input.Threetemperatures subcooled orsuperheat marginpresentations willbeavail-able.Theseareasfollows:

a.RCSsaturation margin-thetemperature saturation marginbased,onthedifference betweenthesaturation temperature andthemaximumtemperature fromtheRTDsinthehotandcoldlegs.b.Upperheadsaturation margin-temperature saturation marginbasedonthedifference betweenthesaturation temperature andtheUHJTCtemperature (basedonthemaximumofthetopthree,UHJTC).CsCETsaturation margin-temperature saturation marginbasedthedifference betweenthesaturation temperature andtherepresenta-tioncoreexit,temperature calculated fromtheCETs(Section2.2.3).2.Processsensoroutputsfordetermination oftemperature saturation margin.3.Provideanalarmoutputforan.annunciator whentemperature saturation marginreachesapreslected setpoint(expected tobewithinO'Fto'0'Fsubcool'ed) forRCSorupperheadsaturation margin.CETsatura-tionmarginisnotalarmedtoavoidpossiblespuriousalarms.32'HEATEDJUNCTIONTHEMOCOUPLE ThegSPDSprocessing equipment performsthefollowing functions fortheHJTC:r1.Determine collapsed liquidlevelabovecore.Theheatedandunheatedthermocouples intheHJTCareconnected insuchawaythatabsoluteanddifferential temperature signalsareavailable.

ThisisshowninFigure2-6.Whenliquid~atersurrounds thethermocouples, theirtemperature andvoltageoutputsareapproxi-matelyequal.ThevoltageV(AC),onFigure2-6istherefore, approxi-matelyzero.lntheabsenceofliquid,thethermocouple temperatures".and outputvoltagebecomeunequal,causingVgACqto:rise.WhenVoftheindividual HJTCrisesaboveapredetermined

setpoint, liquidinventory doesnotexistatthisHJTCposition.

2.Determine themaximumupperplenum/head fluidtemperature ofthetopthreeunheatedthermocouples foruseasanoutputtotheSMMcalcula-.

tion.(Thetemperature processing rangeisfrom100'Fto2300'F).3.Processinputsignalstodisplaycollapsed liquidlevelandunheatedjunctionthermocouple temperatures.

4.Provideanalarmoutput'whenanyoftheHJTCdetectstheabsenceofliquidlevel.

5.ProvidecontrolofheaterpowerforproperHJTCoutputsignallevel.Figure2-7showsthedesignforoneofthetwochannelswhichincludestheheatercontroller powersupplies.

3.2.3COREEXITTHERMOCOUPLE SYSTEMTheQSPDSperformsthefollowing CETprocessing functions:

1.Processcoreexit:thermocouple inputsfordisplay.2.Calculate arepresentative coreexittemperature.

.Although notfinal-ized,thistemperature willbeeitherthemaximumvalidcoreexittemperature ortheaverageof.thefivehighestvalidcoreexittem-peratures.

3.Provideanalarmoutputwhentemperature reachesapreselected value.I4.ProcessCETsfordisplayofCETtemperature andsuperheat.

Thesefunctions areintendedtomeetthedesignrequirements ofNUREG-0737, II.F.2.Attachment l.3.3SYSTEMDISPLAY,TheICCdetection instrumentation displaysinboththeSAS(primarydisplays) andtheQSPDS(backupdisplays) haveanICCsummarypageaspartofthecore.heatremovalcontrolcriticalfunctionsupported bymoredetaileddisplaypagesforeachoftheICCvariablecategories.

Thesummarypagewillinclude:1.RCS/Upper Headsaturation margin-themaximumoftheRCSandUpp'erHeadsaturation margin.2.Reactorvessel.levelabovethecore.3.Representative coieexittemperature.

ISincetheSAShasmoredisplaycapabilities thantheQSPDSsuchascol,or-graphics,

trending, andalargerformat,additional information maybeaddedandwithabetterpresentation thanisavailable withtheQSPDS.Thesevariables areincorporated inotherSASsystemdisplays.

SincetheSASreceivesbothQSPDSchannelsofICCinput,theSASdisplaysbothchannelsofICCinformation.

TheQSPDSdisplaysonlyonechannelofICCinformation foreachvideodisplayunit.

.Althoughallinputsareaccessible fortrendingandhistorical recall,theSAShasadedicated ICCtrendpageforRCS/upper headsaturation margin,reactorvessellevel,andrepresentative coreexittemperature andcoreexitsaturation margin.Thesearealsoavailable asanalogoutputsfromtheQSPDScabinet.tEachQSPDSsafetygradebackupdisplayalsohasavailable themostreliablebasicinformation foreachoftheICCinstruments.

Thesedisplaysarehumanengineered togive.theoperatorclear'nambiguous indications.

Thebackupdisplaysaredesigned:

1.Togiveinstrument indications intheremotechancethattheprimary'isplaybecomesinoperable.

2.Toprovideconfirmatory indications.

totheprimarydisplay.3.Toaidin'surveillance testsanddiagnostics.

Thefollowing sectionsdescribedisplaysaspresently conceived foreachoftheICCinstrument systems.Bothprimaryandbackupdisplaysarein-tendedtobedesignedconsistent withthecriteriainII.F.2Attachment 1andAppendixB.3.3.1.*SATURATION MARGINDISPLAYThefollowing information-ispresented ontheprimarySASandbackup(QSPDS)displays:

Temperature andpressuresaturation marginsforRCS,UpperHead,CoreExitTemperature.

2.Temperatures andpressureinputs.3.3.2HEATEDJUNCTIONTHERMOCOUPLE SYSTEMDISPLAYThefollowing information isdisplayed ontheCFMSandQSPDSdisplays:

Liuqidinventory levelabovethefuelalignment platederivedfromtheeightdiscreteHJTCpositions.

2.8discreteHJTCpositions indicating liquidinventory abovethefuelalignment plate.3.,InputsfromtheHJTCS:a.Unheated)unctiontemperature atthe8positions.

b.Heated)unctiontemperature atthe8positions.

c.Differential junctiontemperature atthe8positions.

2.3.4.COREEXITTHERMOCOUPLE'DISPLAY Thefollowing information isdisplayed ontheSASdisplay:Aspatially orientedcoremapindicating thetemperature ateachoftheCET's.2.Aselective re'adingofCETtemperatures.

3.Therepresentative coreexittemperature.

Thefollowing information isdisplayed ontheQSPDSdisplay:2.Representative.

coreexittemperature.

~Aselective readingoftheCETtemperatures (twohighesttempera-turesineachquadrant) 3.Alistingofallcoreexittemperatures.

Replacement Section5.0.SYSTEMUALIFICATION Thequalification programforSt.Lucie-2ICC.instrumentation willbebasedonthefollowing threecategories ofICCinstruments:

1.Sensorinstrumentation withinthepressurevessel.2.Instrumentation components andsystemswhichextendfromtheprimarypressureboundaryuptoandincluding theprimarydisplayisolatorandincluding thebackupdisplays.

3.Instrumentation systemswhichcomprisetheprimarydisplay~equipment.

Thein-vessel sensorsrepresent thebestequip'ment available consistent withqualification

'andschedular:

requirements (asperNUREG-0737, AppendixB).Designoftheequipment willbeconsistent withcurrentin-dustrypractices in'thisarea.Specifically, instrumentation willbedesignedsuchthattheymeetappropriate stresscriteriawhensubjected tonormalanddesignbasisaccidentloadings.

Seismicqualification tosafeshutdownconditions willverifyfunctionafterbeingsubjected totheseismicloadings.

Theout-of-vessel instrumentation system,uptoandincluding theprimarydisplayisolator, andthebackupdisplayswillbeenvironmentally qualified inaccordance withIEEE-323-1974.

Plant-specific containment temperature andpressuredesignprofileswillbeusedwhereappropriate inthesetests.Thisequipment willalsobeseismically qualifedaccording toIEEE-STD-344-1975.CEN-99(S),

"SeismicQualification ofNSSSSuppliedInstrumentation Equipment, Combustion Engineering, Inc."(August1978)describes themethodsusedtomeetthecriteriaofthisdocument.

FPSLisevaluating whatisrequiredtoaugmenttheout-.of-vessel Class1Einstrumentation equipment qualification programtoNUREG-0588.

Consistent withAppendix.B ofNUREG-0737, theout-of-vessel equipment under.procurement isthebestavailable equipment.

FPLexpectstocompletethisevaluation bytheendofthefirstquarterof1982.RevisiontoSection6.2PROTOTYPE TESTINGThePhase3testprogramwillconsistofhightemperature andpressuretest-ingofthemanufactuied prototype systemHJTCprobeassemblyandprocessing electronics.

Verification of,theHJTCsystemprototype willbethegoalofthistestprogram.ThePhase3testprogramisexpected, tobecompleted bytheendofthefirstcharterof1982.RevisiontoSetion9.0SCHEDULEFOR'ICCINSTRUMENTATION"INSTALLATION

'EFlordiaPowerandLightisactivelypursuing, procuring andexpediting equipment necessary.to implement requirements forTHIitemII.F.2,"Instrumentation forInadequate CoreCooling".

However,thiscommitment ispredicated uponmanufacturers and.vendors meetingtheirscheduled deliverypromises.

Whenfirmschedules aredeveloped FPLwillinformNRCofthemostprobableimplementation date.

APPENDIX1.9BSection10WillBeDeleted Replacement TableI.9B-2TABLE'1.9B-2 EVALUATION OFICC'DETECTION INSTRUMENTATION TODOCUMENTATION REUIREMENTS OFNUREG-0737 ITEMII.F.2ITEM-RESPONSE1oa~l.b.Description oftheICCDetection Instrumentation isprovidedinSection3.0.Theinstrumentation tobeaddedincludes'.the modifiedSMM,theHJTCProbeAssemblies, andImprovedICI(CET)DetectorAssemblies.

/Theinstrumentation described inSection2.0'illbetheICCdetection instrumentation designforFPL.lac~Theplannedmodifications totheexistingUnit2instrumentation willbemadepriortofuelload.Modifications includechangestotheSMM,design,procurement andinstallation oftheHJTCprobeassemblies, andimprovedICIDetectorAssemblies (whichnecessitate installation ofimprovedICINozzleFlanges).

ThefinalICCDetection Instrumentation.

willbeasdescribed inSec-tion3.0.2.Thedesignanalysisandevaluation oftheICCDetection Instru-mentation isdiscussed inSections2.0and4.0.andAppendixA.Testingisdiscussed in.Section6.0.3.TheHJTCShasoneremaining testphase.ThePhase3testprogramwillconsistofhightemperature andpressuretestingofamanufactured production prototype systemHJTCprobeas-semblyandprocessing electronics.

ThePhase3testprogramwillbeexecutedattheC-EtestfacilityusedforthePhase2testandisexpectedtobecompleted bythefirstquarterof1982.Nospecialverification orexperimental testsareplannedforthehotlegandcoldlegRTDsensors,thepressurizer pressuresensors,ortheTypeK(chromel-alumel) coreexitthermocouples sincetheyarestandardhighqualitynuclearinstruments withwellknownresponses.

Forqualification testing,allout-of-vessel sensorsandequip-ment,including theQSPDSuptoandincluding theisolation totheSAS,willbeenvironmentally qualified toIEEStd.323-1974asinterpreted toCENPD-255 Rev.Ol,"Qualification ofC-EInstru-"ments",asinterpreted byCENPD-182, andseismically, qualified toIEEESTd.344-1975, "SeismicQualification ofC-EInstrumen-tationEquipment".

Thequalification toNUREG-0588 isbeingaddressed bytheC-EOwners'roup (Seetheresponsetoitem1inTable3formoreinformation).

Table1.9B-2Continued 4~Necessary augmenting ofoutofvesselclass1Einstrumentation toNUREG-0588 requirements willbeaddressed bytheFPLevala-tiontobecompleted bytheendofthefirstquarterof1982.Thistableevaluates theICCDetection Instrumentation's con-formancetotheNUREG-0737, ItemII.F.2documentation require-ments.Table1.9B-3evaluated conformance toAttachement 1ofItemII.F.2Table1.9B-4evaluates conformance toAppendixBofNUREG-0737.

5.TheICCdetection instrumentation processing anddisplaycon-sistsoftwocomputersystems;the2redundant channelsafetygrademicrocomputer basedQSPDS,andtheSAS.TheICCinputsareacquiredandprocessed bythesafetygradeQSPDSandisolatedandtransmitted tothe.primarydisplayintheSAS.TheQSPDSalsohastheseismically qualified backupdisplaysfortheICCdetection instruments.

Thesoftwarefunctions forprocessing arelistedinSection3.2,thefunctions fordisplayarelistedinSection3.3.ThesoftwarefortheQSPDSisbeingdesignedconsistent totherecommendations ofthedraftstandard, IEEEstd.P742/ANS4.3.2,"Criteria fortheApplication ofProgrammable DigitalComputerSystemsintheSafetySystemsofNuclearPowerGener-atingStations".

Thisdesignprocedure verifiesandvalidates thattheQSPDSsoftwareisproperlyimplemented andintegrated withthesystemhardwaretomeetthesystem'sfunctional require-ments.Thisprocedure isqualityassuredbymeansoftheC-EQADP;SinceC-Ehasdesignedtheonlylicensedsafetygradedigitalcomputersysteminthenuclearindustry, C-Ehasthefacilities andexperience todesignreliablecomputersystems.TheQSPDShardwareisdesignedasaredundant safetygradequalified computersystemwhichisdesignedtotheunava'il-abilitygoalof0.01withtheappropriate sparepartsandmain-tenancesupport.6.Section9.0discusses thescheduleforinstallation andimple-mentation ofthecompleteICCDetection Instrumentation.

7.Guidelines foruseoftheICCDetection Instrumentation "arediscussed inSection7.0.Afutureamendment willdiscusskeyoperatoractionsinthecurrentemergency procedures forICC.Theammendment willbesubmitted priortofuelload.Section7.0discusses theemer-gencyprocedures tobeimplemented uponincorporation ofthecompleteICCDetection

System, Table1.9B-2Continued 9.Thefollowing describes additional submittals thatwillbeprovidedtosupporttheacceptability ofthefinalICCDetec-tionInstrumentation.

1)Environmental

'andSeismicQualification oftheinstru-mentation equipment.

Additional evaluation toNUREG-~0588willbeprovidedbyJune1982.2)Modifications toemergency procedures (priortofuelload)3),ChangestoTechnical Specifications (priortofuelload)

TABLE'.'B-3EVALUATION OFICC'DETECTION INSTRUMENTATION TOATTACHMENT 1ofII.F.2ITEMRESPONSESt.Lucie2has56coreexitthermocouples (CETs)distributed uniformly overthetopofthecore,Section3.1.3hasadis-criptionoftheCETsensors,Figure1.9B-7depictsthelocations oftheCETs.2.",TheSASmeetstheprimarydisplayrequirements forCETtem-peiatures.

2~'a~AspatialCETtemperature mapisavailable ondemand.2.b.Aselective representative CETtemperature willbedisplayed continuously ondemand.Althoughnotfinalized, thistempera-turewillbeeitherthemaximumCETtemperature ortheaverageofthefivehighestCETtemperatures.

2~c~,2.d.TheSASprovidesdirectreadoutofCETtemperature withade-dicateddisplaypage.Thelineprinterprovidesthehardcopy.

capability

'forrecording CETtemperatures.

ATheSAShasanextensive trendandhistorical datastorageandretrieval system.Thehistorical datastorageandretrieval systemfunctionallows allICCinputstoberecorded, stored,andrecalledbytheoperator.

The:operator (andotheruserstations) can'graphically trendanyCETvalueonthedisplayscreen.Adedicated ICCtrendpagewhichincludestherepresentative CETtemperature andrepresentative CETsaturation marginwillbeaccessible totheusers.2~e~TheSAShasalarmcapabilities andvisuallydisplayed valuealarmsonthesystemlevelpages.2.f.TheSASis.anextensively human-factor designeddisplaysystemwhichallowsquickaccesstorequested displays.

3~ICCinstrumentation QSPDSdesignincorporates aminimumofonebackupdisplaywiththecapability ofselective readingofaminimumof16operableThermocouples, 4fromeachquadrant.

AllCETtemperatures canbedisplayed within5minutes.4.5~Thetypesandlocations ofdisplaysandalarmsaredetermined for,theprimarydisplaybyperforming ahuman-factors analysis.

TheQSPDSalsoincorporates humanfactorsengineering.

Theuseofthesedisplaysystemswillbeaddressed inoperating proce-dures,emergency procedures, andop'erator training.

TheICCinstrumentation wasevaluated forconformance toAppendixBofNUREG-0737 (seeTable1.9B-4).

Table1.9B-3Continued 6.TheQSPDSchannelsareClasslE,electrically independent, energized fromindependent stationClasslEpowersourcesandphysically.

separated inaccordance withRegulatory Guide1..75"Physical Independence ofElectricSystems"January1975(Rl)uptoandincluding theisolation devices.7~ICCinstrumentation shallbeenvironmentally qualified pursuanttoC-Eownersgroupqualification program.Theisolation de-vicesintheQSPDSareaccessible formaintenance following anaccident.

8.Primaryandbackupdisplaychannelsaredesignedtoprovidethehighestavailability possible.

TheQSPDS.isdesignedtoprovide99%availability.

Theavailability oftheQSPDSwillbeaddressed intheTechnical S'pecifications.

9.Thequalityassurance provisions ofAppendixB,Item5,willbeappliedtotheICCdetection instruments asdescribed intheAppendixBevaluation inTable1.9B-4.

RevisiontoTable1-9B-4ITEMRESPONSE5.1.144"Auditing ofQualityAssurance ProgramsforNuclearPowerPlants"..

6.TheICCdetection instrumentation outputsarecontinuously avail-ableontheQSPDSdisplaysthroughmanualcallupofdisplays.

throughmanualcallupof'displays.

Additionally, onechannelofanalogtrend,,;recording willcontinuously indicatetheICCsummaryvariables.

~7.TheICCinstrumentation isdesignedtoprovidereadoutdisplayandtrendinginformation totheopeartorthroughtheSASandanalogtrendrecording oftheICCsummaryvariables.

(SeeSection3.3);8.Theinadequate.

corecoolinginstrumentation isspecifically andsingularly identified sothattheoperatorcaneasilydiscerntheiruseduringanaccidentcondition.

9.Transmission ofsignalsfrominstruments ofassociated sensorsbetweenredundant IEchannelsorbetween1Eandnon-1Einstru-mentchannelsareisolatedwithisolation devicesqualified totheprovisions ofAppendixB.10.TheQSPDSconsistsoftworedundant channelstoavoidinter-ruptionsofdisplayduetoasinglefailure.IfintheremotechancethatonecompleteQSPDSchannelfails,theoperatorhas:1)Additional channelsofICCsensorinputsforcoldlegtemperature, hotlegtemperature, andpressuizer pres-sureonthecontrolboardseparatefromtheQSPDS.'2)TheHJTCSandCEThavemultiplesensorsineachchannelfortheoperatortocorrelate andcheckinputs.3)TheHJTCSsensoroutputmaybetestedbytheoperatorreadingthetemperature oftheunheatedthermocouple andcomparing toothertemperature indications.

4)Othervariables areavailable totheoperatorontheMainControlBoardforverifying theICCparameter.

Servicing, testingandcalibrating programsshallbeconsis-tent-withoperating technical specifications.

12.13.TheICCinstrumentation, including theQSPDS,arenotintendedtoberemovedorbypassedduringoperation.

Administrative controlwillbenecessary toremovepower,fromachannel.Thesystemdesignissu'chastofacilitate administrative control'ofaccesstoallsetpoints adjustments, calibration adjustments andtestpoints.

RevisiontoTable1.9B-4Continued 14.TheQSPDSisdesignedtominimizeanomalous indications totheoperator(seesection3.3).15.Instrumentation isdesignedtofacilitate replacement ofcom-ponentsormodules.Thei'nstrumentation designissuchthatmalfunctioning components canbeidentifed easily.16.Thedesignincorporates thisrequirement totheextentprac-tical.17.Thedesignincorporates thisrequirement totheextentprac-tical.18.Thesystemisdesignedtobecapableofperiodictestingofinstrument channels.

Retrieved from "https://kanterella.com/w/index.php?title=ML17212A922&oldid=749876"