ML17215A270

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Safety Parameter Display Sys Parameter Selection Evaluation & Implementation Plan.
ML17215A270
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 03/01/1984
From:
FLORIDA POWER & LIGHT CO.
To:
Shared Package
ML17215A269 List:
References
RTR-NUREG-0737, RTR-NUREG-737 GL-82-33, PROC-840301, NUDOCS 8403060116
Download: ML17215A270 (13)
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SAFETYPARAMETERDISPLAYSYSTEMPARAMETERSELECTIONEVALUATIONANDIMPLEMENTATIONPLAN,.04080Ei0110i84030'DRADOCK05000335F...PDR h

SPDSPage2of6I.DESCRIPTI0NThepurposeoftheSafetyParameterDisplaySystem(SPDS)istoassistcontrolroompersonnelinevaluatingthesafetystatusoftheplant.'heSPDSatSt.Lucieprovidesacontinuousdisplayofawidevarietyofplantparametersona19"CRTcentrallylocatedinthecontrolroom.InputstotheSt.LucieSPDSareobtainedviaexistingplantinstrumentation,processedthroughacentralcomputer,andthendisplayedonCRTs.TherearethreeprimarydisplaysthatmaybeshownontheCRTs,oneforeachmajormodeofoperation-normal,heatup/cooldown,andshutdowncoolingmodes.Thenecessaryplantparametersaredisplayedineach'modetoallowthecontrolroomoperatortoadequatelyassessplantsafetystatusforavarietyofnormalandabnormalplantoperatingconditions.Supplementalparametersandtrendinginformationcanalsobedisplayed.AlistingofchosenparametersfortheprimarydisplaysissuppliedinTable1.II.BASISFORPARANETERSELECTIONNRCGenericLetter82-33entitled"Supplement1toNUREG-0737RequirementsforEmergencyResponseCapability"requiresthat,asaminimum,theSP0Sshouldprovideinformationtoplantoperatorsabout:i)-)iii)iv)v)ReactivityControlReactorcorecoolingandheatremovalfromtheprimarysystemReactorcoolantsystemintegrityRadioactivitycontrolContainmentIntegrityAdditionalguidanceusedtoselectSPDSparameterswasobtainedfromworkperformedbyautilityownersgroup,RegulatoryGuide1.97,andoperatingexperience.ThebasisfortheparametersselectedtomeettherequirementsofeachofthefiveareasidentifiedinGenericLetter82-33isasfollows:ReactivitControlThepurposeofmonitoringareactivitycontroiparameteristoprovidetotheoperatorthestatusoffluxconditionswithinthereactorcore.Inorder.toassessthereactorcorefluxconditionsitisnecessarytomonltotreactorpowerinallrangesandrateofchangeofpower.Therefore,theSPDSmonitorsthestartuprange,widerangelogarithmicandpowerrangenuclearinstruments.Thisprovidesthemeanstomonitorcore.fluxconditionsthroughoutallrangesofreactoroperation.Changesinfluxconditionsaremonitored'ontheSPDSbythestartuprateindication.Inadditiontotheseparameters,reactortripstatusisalsodisplayedtoprovidetheoperatoradditionalinformationonreactivitycontrolsystemsstatus.TheSPDS'monitorscorepower,startuprate,andreactortripstatus.Basedontheaboveevaluation,theseparametersaresufficienttoprovidetheoperatorwithindicationofreactivitiycontrolforarangeofplantconditions.

SPDSPage3of62.ReactorCoreCoolinandHeatRemovalfromthePrimarSstemTheobjectiveinthisareaistoprovidesufficientindicationsuchthatanoperatorcandetermine,ifthereactorcoreisbeingadequatelycooledandheatisbeingcontinuouslyremovedfromthissystem.Toensureadequatecorecoolingandheatremoval,itisnecessarytoensurethereisflowthroughthecoreandthataheatsinkisavailabletoremoveheatfromthecore.Therearethreeseparatecasesthatmustmeetthesecriteria:RCSintegritymaintained,lossofRCSintegrity,andshutdowncooling.'IInthecasewhereRCSintegrityismaintained,flowthroughthecoremustfirstbeestablished.CoreexittemperaturesandcoldlegtemperaturesaremonitoredonSPDStoassurethatthereisadifferentialtemperatureacrossthecoreandheatisbeingremoved.Subcoolingmarginassuresthereisnovoidformationthatmightimpedenaturalcirculationthroughthecorewhenthereisnoforcedflow.Theprimaryheatsinkforthiscasewouldbethesteamgenerators.Steamgeneratorlevelsandpressuresprovideindicationthatthesteamgeneratorsareavailableasprimaryheatsinks.InthecasewhereRCSintegrityisnotmaintained(i.e.,LOCA)theSafetyInjectionActuationmessageonSPDSindicatesthatcoolingwaterisgoingtothereactorcoolantsystem.Coreexittemperaturesaremonitoredtoassurethatheatisbeingremoved.Thereactorvessellevelmonitorindicatestheextenttowhichthecoreiscoveredwithwater.Finally,forthespecialcaseofshutdowncooling,aseparatedisplayprovidesindicationofshutdowncoolingflowandtemperatures.This,combinedwithcoreexittemperatures,isapositiveindicationofheatremoval.Thesemonitoredparameters-coreexittemperature,coldlegtemperatures,subcooledmargin,steamgeneratorlevel,steamgeneratorpressure,reactorvessellevel,shutdowncoolingtemperaturesandflowandthesafetyinjectionactuationmessage-aresufficientfortheoperatortoassessreactorcorecoolingforarangeofplantconditions.30RCSInteritTheobjectiveofthisareaistoprovidesufficientindicationsuchthatanoperator'candetermine'ifallprimarycoolantsystemboundariesareintact,thusmaintainingcoolantinventoryforcorecooling.RCSintegritymaybebreachedeitherintheformofaLossOfCoolantAccident(LOCA)tocontainmentorasaSteamGeneratorTubeRupture(SGTR).Pressurizerlevel,pressurizerpressureandreactorvessellevelareusedtoprovidetheoperatorwithindicationofaproperlymaintainedReactorCoolantSystemboundary.

SPDSPage4of6AdditionalindicationofafailureofRCSintegrityintheformofaLOCAcanbedeterminedbycontainmentradiationorbythecontainmentenvironmentindication.Thecontainmentenvironmentindicationwillalarmifanyofitsinputparameters-containmenttemperature,pressureorsumplevel-exceedsetlimits.IndicationofafailureofRCSintegrityintheformofaSteamGeneratorTubeRupture(SGTR)isprovidedbysteamgeneratorlevelsandpressuresandbythesecondaryradiationindication.RisingsteamgeneratorlevelisoneindicationofanSGTR.Thesecondaryradiationindicationwillalarmifeitherofitsinputs,thesteamgeneratorblowdownradiationorairejectorradiationmonitors,exceedssetlimits.ASGTRcouldcauseasecondaryradiationalarm.Additionally,chargingandletdownsystemflowsarealsodisplayed.IncreasedchargingflowisthefirstsignofasmallbreachinRCSintegrity.Thesemonitoredparameters-pressurizerpressure,pressurizerlevel,reactorvessellevel,containmentenvironment,containmentradiation,secondaryradiation,steamgeneratorlevels,steamgeneratorpressures,andchargingandletdownflows-aresufficienttoassessRCSintegrityforarangeofoperatingconditions.RadioactivitControlTheobjectiveofthisareaistoprovidesufficientindicationsuchthatanoperatorcandeterminethatnoradioactivesubstancesarebeingreleasedtotheenvironmentinanuncontrolledmanner.RadioactiveproductscanbereleasedfromtheRCSintoeitherthecontainmentduringaLOCAorintothesecondarysideduringasteamgeneratortuberupture.Radioactivitycontrolis,therefore,monitoredintwoways,bythecontainmentradiationindicationandbythesecondaryradiationindication.Containmentradiationissuppliedasadigitalindicationfrom1to108R/hr.,Ahighradiationsignalalsocausesacontainmentisolationsignaltobeinitiatedtopreventuncontrolledreleasetotheenvironment.Thesecondaryradiationindicationwillalarmifeitherofitsmonitoredinputs-airejectorradiationorsteamgeneratorblowdownradiation-exceedsspecifiedlim,its.Theseindications-containmentradiationandsecondaryradiation-providetheoperatorwithindicationofanypotentialuncontrolled'radiationrelease.

SPDSPage5of65ContainmentInteritTheobjectiveofthisareaistoprovidesufficientindicationsuchthatanoperatorcandetermineifacontainmentboundaryisbeingmaintainedtocontrolradioactivesubstancesduringandfollowingaLossofCoolantAccident(LOCA).Todothis,challengestothecontainmentmustbemonitored.Challengestothecontainmentaremonitoredviathecontainmentenvironmentindication.Thecontaimentenvironmentindicationisaderivedparameterusingcontainmenttemperature,pressure,andsumplevelasinputs.Shouldanyoftheseparametersgooutofestablishedlimits,analarmwilloccur.Thisprovidesanindicationthatcontainmentintegrityisbeingchallenged,andcorrectiveactionsshouldbetakenbytheoperator.Themessagefora-SafetyInjectionActuationSignal(SIAS)onthedisplaywillinferthataContainmentIsolationSignal(CIS)hasbeeninitiated(CISoccursonSIAS).Theseindications-containmentenvironmentandSafetyInjectionactuation-inconjunctionwiththeRCSintegrityparametersprovidetheessentialinformationtoassesscontainmentintegrity.Basedontheaboveinformation,theSPDSdisplaysprovidesufficientinformationforthecontrolroomoperatortoassessplantstatusduringheatup-cooldown,normaloperation,shutdownoperation,andforawiderangeofpostulatedplantaccidentsincludingHainSteamLineBreaks(HSL6),LOCA's,SGTR's,andBoronDilutionEvents.III.SAFETYANALYSISTheSafetyParameterDisplaySystemisanonwafety,non-seismicsystem(withtheexceptionoftheisolationsystem).Itisapassive,monitoringandindicationsystemonly,anddoesnotinteractwiththeautomaticinitiationofanyprotectionsystem.Allmodificationstosafety-classIEcircuitswhereSPDSinputsareobtainedsatisfytheisolationand'qualificationrequirementsofFSARSection7.1and7.5.OnlySafetyClassIEequipmentisusedandseparationisprovidedbyroutingwiresthroughtotallyenclosedmetallicwirewaysdedicatedtoeachsafetydivisionandterminatingintheClassIETerminationCabinets.Furthermore,allinterfacebetweensafetyandnon-safetysignalsarethrough:,.isolationdevicesfully,qualifiedandinstalledtoIEEE-323-1974andIEEE-344-1975standards.Finally,implementationoftheSPDSwillrequirenochangestotheplant'sTechnicalSpecifications.Basedontheaboveinformation,ithasbeendeterminedthatinstallationandoperationoftheSPDSdoesnotconstituteanunreviewedsafetyquestioninaccordancewith10CFR50.59.

SPDSPage6of6IV.IHPLEHENTATI0NInFPLletterL-83-236,datedApril15,1983,FPLcommittedtohavetheSafetyParameterDisplaySystem(SPDS)fullyoperable,includingtrainingofoperators,bytheFall1984outageatSt.LucieUnit1.DuetotheextendedoutageatSt.Lucie1toremovetheThermalShield,thenextoutageatUnit1isnotplanneduntilFall1985(cycle7).BecausetheSPDSinstallationcanonlybecompletedduringaplantoutage,finalcompletionoftheSPDSwillbedelayeduntilFall1985.Therefore,FPLwillhavetheSPDSfullyoperable,includingtrainingofoperators,priortostartupfollowingtheFall1985outageatSt.LucieUnit1.

ST.LUCIEPLANTUNITNO.1NUREG0696-'UNCTIONALCRITERIAFOREMERGENCYRESPONSEFACILITIESSAFETYPARAMETERDISPLAYSYSTEM(SPDS)PARAMETERSELECTIONKEYPARAMETERSTABLE1REMARKSPage1PLANTFUNCTIONDESCRIPTIONRANGETYPELOCATIONOFPARA-DISPLAYTYPEe.g.NUMBEROFMETERONDISPLAYTARGET,BARGRAPHINSTRUHENTSUSEDCPSSourceRangePowerLevel(Startup)101to104CPSDirectAverageBelowTitleDigitalValue4REACTIVITYCONTROLPercentWideRangePower(Logrithmic)PercentPower(Linear)StartupRateReactorTripSignal1x108ampsto15040to1254-1to7dpmDirectAverageDirectAverageDirectAverageCalculatedBelowTitleBelowTitleMessageAreaLine6MessageAreaLine7DigitalValue4DigitalValue4DigitalValue4"'MessageColdLegTemperature212oto705oFDirectAverageTopRowRightBarGraph6DigitalValueWideRangeWR)4NarrowRange(NRCoreExitTemperatureFeedwaterIsolationSignalAFB32to2300oFDirectAverageThisisaderivedpara-meterusingAFASASB,HSISASB,andSIASASBBottomRowRightMessageAreaLine9DigitalValueMessage45Thermocouples(TC's)6Digital~ContactInputsREACTORCORECOOLINGANDHEATREMOVALFROMTHEPRIMARYSYSTEMMainSteamIsolationSignal(MSIS)ASBDirectHessageAreaLine8RCSAverageTemperatureAderivedparameterMessageAreafromHot6ColdLegTemp.Line5Message4WRColdLeg4WRHotLegDigitaIValue4NRCoIdLeg4NRHotLeg

ST.LUCIEPLANTUNITNO.1'UREG0696-FUNCTIONALCRITERIAFOREMERGENCYRESPONSEFACILITIESSAFETYPARAMETERDISPLAYSYSTEM(SPDS)PARAMETERSELECTIONTABLE1Page2PLANTFUNCTIONKEYPARAMETERSDESCRIPTIONRANGEREMARKSTYPELOCATIONOFPARA-DISPLAYTYPEe.g.NUMBEROF'HETERONDISPLAYTARGET,BARGRAPHINSTRUMENTSUSEDReactorVesselLevel0to1004LowestBottomRowCenterTarget1forChannelA1forChannelBREACTORCORECOOLINGANDHEATREMOVALFROMTHEPRIMARYSYSTEMShutdownCooling(SDC)FlowSDCfrom.RCS(Temp.)SDCtoRCS(Temp.)SafetyInjectionActuationSignal(SIAS)0to8000gpm0to400oF0to400oFDirectDirectDirectDirectCenterSectionCenter/LeftSectionCenter/LeftSectionMessageAreaLine10BarGraphSDigitalValueBarGraph6Digita1Va1ueBarGraph6DigitalValueMessage2DigitalContactsSteamGenerator(S/G)LeveIsA6BS/GPressureA6B0to10040to1200AverageCenterSectionAverageCenterSectionBarGraph6DigitalValueBarGraph8DigitalValue4NRS/GA4NRS/GB3S/GA3S/GBRCSINTEGRITYSubcoolingChargingFl'owContainmentEnvironment700to-2100oFLowest(subcooledtosuperheat)0to150gpmDirectAderivedpararneterusingcontainmentpressure,temperature,levelBottomRowRightMiddleRow/LeftBottomRowTargetBarGraph6DigitalValueTargetCont.Level2Cont.Press.8Cont.Temp.1 ST.LUGIEPLANTUNITNO.1NUREG0696-FUNCTIONALCRITERIAFOREMERGENCYRESPONSEFACILITIESSAFETYPARAMETERDISPLAYSYSTEM(SPDS)PARAMETERSELECTIONKEYPARAMETERSTABLE1REMARKSPage3PLANTFUNCTIONDESCRIPTIONRANGETYPELOCATIONOFPARA-DISPLAYTYPEe.g.NUMBEROFMETERONDISPLAYTARGET,BARGRAPHINSTRUMENTSUSEDContainmentRadiationCoreExitTemperatureLetdownFlow10oto108R/HR32to2300oF0to140gpmAverageDirectAverageDirectBottomRowBottomRowRightMiddleRow/LeftDigitalValue2LowRange'WideRangeDigitalValue45TC'sBarGraph6DigitalValuePressurizerLevel0to1004AverageTopRowCenterBarGraphSDigitalValueRCSINTEGRITYPressurizerPressure0to1600psiaDirectTopRowBarGraph6DigitalValueRCSAverageTemperatureDerivedfromHot6ColdLegTemps.MessageAreaLine5DigitalValue4WRCoIdLeg4WRHotLeg4NRColdLeg4NRHotLegRCSPressure-0to3000psiaCalculatedTopRowBarGraph6DigitalValue4NarrowRange2WideRangeReactorVesselLevel0to1004LowestBottomRowCenterDigitalValue1-Ch.A1-Ch.BSecondaryRadiatio~S/GLevelAGBS/GPressureDerivedfromS/GBlowdown6AirEjectorRadiation0to1004Average0to1200psiaAverageBottomRowLeftCente'rSectionCenterSectionTargetBarGraphSDigitalValueBarGraph6DigitalValue1-AirEjector2-S/GBlowdown4NRS/GA4NRS/GB3S/GA3S/GB ST.LUCIEPLANTUNITNO-1NUREG0696-FUNCTIONALCRITERIAFOREMERGENCYRESPONSEFACILITIESSAFETYPARAMETERDISPLAYSYSTEM(SPDS)PARAMETERSELECTIONTABLE1Page4PLANTFUNCTION-KEYPARAMETERSDESCRIPTIONRANGEREHARKSTYPELOCATIONOFPARA-DISPLAYTYPEe.g.NUHBEROFHETERONDISPLAYTARGET,BARGRAPHINSTRUMENTSUSEDRADIOACTIVTYContainment'RadiationCONTROLSecondaryRadiation100to108R/HRDerivedfromS/GBlowdown6AirEjectorRadiationAverageBottomRowCalculatedBottomRowDigitalValueTarget2LowRange2WideRangeAirEjector1S/GBlowdownCONTAINMENTINTEGRITYContainmentEnvironmentAderivedparameterusingcontainmenttemperature,pressure,6levelBottomRowTargetCont.Level2Cont.Press.8Cont.Temp.1 vr

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