ML17212A922

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
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)

Text

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

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

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.

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:

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.

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.

.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.

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.

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).

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)

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.

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.

RevisiontoTable1.9B-4Continued14.TheQSPDSisdesignedtominimizeanomalousindicationstotheoperator(seesection3.3).15.Instrumentationisdesignedtofacilitatereplacementofcom-ponentsormodules.Thei'nstrumentationdesignissuchthatmalfunctioningcomponentscanbeidentifedeasily.16.Thedesignincorporatesthisrequirementtotheextentprac-tical.17.Thedesignincorporatesthisrequirementtotheextentprac-tical.18.Thesystemisdesignedtobecapableofperiodictestingofinstrumentchannels.