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~'Fk FPLLetterL-99-195A.InformationRelatedtoNon-LOCADoseCalculationsAttachmentPage1of41.SteamGeneratorSGTubeRutureSGTRSteaminRatesa)Steamreleasedinthefirst30minutes(priortooperatoraction)83,942Ibm(46.6Ibm/sec)82,028Ibm(45.6Ibm/sec)viaMSSVsofAffectedSGviaMSSVsofIntactSGb)Steamreleasedfromtimeofoperatoraction(30minutes)until2hours572,026Ibm(105.9Ibm/sec)viaADVsc)Steamreleasedfromtimeofoperatoraction(30minutes)until8hours1,479,854Ibm(54.8Ibm/sec)viaADVsNOTE:TotalsteamreleasesareshowninTable8.6.3-3oforiginalsubmittal(Attachment2totheenclosurewithFPLLetterL-98-308)12.CalculatedDosesforSGTRandFeed-lineBreakF/BEventsa)SGTRExclusionAreaBoundary(EAB)andLowPopulationZone(LPZ)CalculatedDoses:EAB/2hrLPZ/ShrThyroidPISThyroidGISWholeBody12.0rem2.0rem0.2rem6.0rem8.0rem0.1remb)FLBwithLOACEABandLPZCalculatedDoses:EAB/2hrLPZ/ShrThyroidWholeBody1.56rem<2mrem0.71rem<3mrem FPLLetterL-99-1953.AssumtionsforDoseCalculationsAttachmentPage2of4Theinputassumptionsfornon-LOCAeventsremainunchangedfromthoseinCycle2analysisexceptforthefollowing:a)iodineDoseConversionFactorsusedarefromICRP-30forallre-analyzedevents,exceptforSGTRwhichisconservativelybasedonTID-14844(asnotedinTable8.0-8oforiginalsubmittal,Attachment2totheenclosurewithFPLLetterL-98-308).b)RCSCooldownRatefor8hourdoseis-38'F/hrinsteadof100'F/hrtoconservativelymaximizedoseforre-analyzedevents.c)Maximumallowablelimitsforfuelfailureeventsarebackcalculatedfromdoseacceptancelimits.d)DecontaminationFactor(DF)usedforatmosphericdumpvalvesandmainsteamsafetyvalvesis10insteadof1.There-analysescreditaDFequalto10foreventsthatdonotuncoverthesteamgeneratortubesordonotundergosteamgeneratordryout.Cycle2analysescreditedflashingonaneventspecificbasis,e.g.Cycle2LossofACPowerdoseevaluationusedaDFequalto100forthereleaseoftheinitialactivityfromthesteamgeneratorandaDFequalto1fortheactivityassociatedwiththeprimarytosecondaryleak.NOTE:UFSARTable15.0-19listsparametersusedinCycle2siteboundarydosecalculations.
~'Fk FPLLetterL-99-195A.InformationRelatedtoNon-LOCADoseCalculationsAttachmentPage1of41.SteamGeneratorSGTubeRutureSGTRSteaminRatesa)Steamreleasedinthefirst30minutes(priortooperatoraction)83,942Ibm(46.6Ibm/sec)82,028Ibm(45.6Ibm/sec)viaMSSVsofAffectedSGviaMSSVsofIntactSGb)Steamreleasedfromtimeofoperatoraction(30minutes)until2hours572,026Ibm(105.9Ibm/sec)viaADVsc)Steamreleasedfromtimeofoperatoraction(30minutes)until8hours1,479,854Ibm(54.8Ibm/sec)viaADVsNOTE:TotalsteamreleasesareshowninTable8.6.3-3oforiginalsubmittal(Attachment2totheenclosurewithFPLLetterL-98-308)12.CalculatedDosesforSGTRandFeed-lineBreakF/BEventsa)SGTRExclusionAreaBoundary(EAB)andLowPopulationZone(LPZ)CalculatedDoses:EAB/2hrLPZ/ShrThyroidPISThyroidGISWholeBody12.0rem2.0rem0.2rem6.0rem8.0rem0.1remb)FLBwithLOACEABandLPZCalculatedDoses:EAB/2hrLPZ/ShrThyroidWholeBody1.56rem<2mrem0.71rem<3mrem FPLLetterL-99-1953.AssumtionsforDoseCalculationsAttachmentPage2of4Theinputassumptionsfornon-LOCAeventsremainunchangedfromthoseinCycle2analysisexceptforthefollowing:a)iodineDoseConversionFactorsusedarefromICRP-30forallre-analyzedevents,exceptforSGTRwhichisconservativelybasedonTID-14844(asnotedinTable8.0-8oforiginalsubmittal,Attachment2totheenclosurewithFPLLetterL-98-308).b)RCSCooldownRatefor8hourdoseis-38'F/hrinsteadof100'F/hrtoconservativelymaximizedoseforre-analyzedevents.c)Maximumallowablelimitsforfuelfailureeventsarebackcalculatedfromdoseacceptancelimits.d)DecontaminationFactor(DF)usedforatmosphericdumpvalvesandmainsteamsafetyvalvesis10insteadof1.There-analysescreditaDFequalto10foreventsthatdonotuncoverthesteamgeneratortubesordonotundergosteamgeneratordryout.Cycle2analysescreditedflashingonaneventspecificbasis,e.g.Cycle2LossofACPowerdoseevaluationusedaDFequalto100forthereleaseoftheinitialactivityfromthesteamgeneratorandaDFequalto1fortheactivityassociatedwiththeprimarytosecondaryleak.NOTE:UFSARTable15.0-19listsparametersusedinCycle2siteboundarydosecalculations.
FPLLetterL-99-195AttachmentPage3of4B.ResonsetoNRCReuestforAdditionalInformation:LOCAAnalsis1.FPLshouldprovideadiscussionofthegeneralphilosophyforinputparametervariancesorinstrumentdrift,uncertainties,inaccuraciesandothervariances,andhowtheyareaccountedforintheLOCAanalysis.~Resonse:Ingeneral,theLOCAanalysisforSt.LucieUnit2presentedinFPLletterL-98-308hasbeenperformedtoachieveresultsthatconservativelyboundexpectedconsequencesforthisevent.ThisconservatismisinherentintheABB-CEevaluationmodelsusedinthisanalysisthathavebeendevelopedandapprovedinaccordancewiththeconservativeacceptablefeaturesforECCSevaluationmodelsdelineatedin10CFR50,AppendixK.Assuch,theABB-CEevaluationmodelsusedinthisanalysisprovidesubstantialmarginsoverrealisticconditionsthataresufficienttoboundvariancesininputparametersincludinginstrumentdrift,uncertaintiesandinaccuracies.Tables7.1.2-1and7.2.2-1ofAttachment2totheenclosurewithL-98-308listthekeyparametersusedintheLOCAanalysisforSt.LucieUnit2.Inadditiontothesubstantialinherentconservatismintheevaluationmodels,theLBLOCAandSBLOCApeakcladdingtemperature(PCT)significantanalysisinputparameterswereselectedtoboundas-operatedplantvaluesincludingvariances.Otherparameters,suchasRCSflowrateandRCSpressure,areusedattheirnominal/referencevaluesasthePCTisnotverysensitivetovariationsinthevaluesoftheseparameters.TheboundingPCTsignificantinputparametersareconservativelyapplieddeterministically,providingfurtherassurancethattheLOCAanalysisresultsprovidemargintotheexpectedconsequencesforthisevent.AspartoftheReloadProcessImprovement(RPI)proposedbythislicenseamendmentFPLusesareloadanalysis"groundrules"processwiththeNon-PhysicsAssessmentChecklist(NPAC)toassurethatallthesafetyanalysis(includingSBLOCAandLBLOCA)input-assumptionsremainboundingfortheplantconfigurationeverycycle.Thisprocessassuresthatanyproposedoractualchangesinplantconfigurationareappropriatelyverifiedtoremainboundedbythereloadsafetyanalysisfortheupcomingfuelcycle.2.FPLshoulddiscussspecificallythehandlingofHPSIflowdrift,uncertainties,andvariancesintheSBLOCAanalysisinput.~Resonse:HPSIflowassumptionsintheSt.LucieUnit2SBLOCAanalysisconservativelyboundactualplantdesignconfigurationvaluessufficientlytocompensateforanyflowmeasurementvariancesduetoinstrumentdrift,uncertaintyandinaccuraciesduringrequiredsurveillances,asdiscussedbelow:a)MaximumFlowCondition:Analysisassumptionsutilizeaconservativeflowdeliverycurvethatassumesathreecoldlegtotalinjectionflowof453gpmat0psiareactorcoolantsystem(RCS)pressure.ThisflowcomparestotheTechnicalSpecification4.5.2.i.1minimumthreecoldlegflow Ii FPLLetterL-99-195AttachmentPage4of4surveillancerequirementof476gpmOadischargeheadof1150to1290ft.A~conservativeallowanceof23gpminthethreelooptotalinjectionflowthusexistsbetweentheanalysisvalueandtheTechnicalSpecificationsminimumrequiredvalue.ThetotalHPSIflowmeasurementuncertaintyiscalculatedtobe18gpmforthecombinedthreeloopflow.Thisuncertaintyincludestheinstrumentloopuncertainty(includingdriftandotherinaccuraciessuchasorificeplatetolerancesandprocesstemperaturevariance)andthrottlevalvepositionvariance(a1/32"stemposition)thatareapplicableduringroutineflowandthrottlevalvepositionverificationsurveillancesrequiredbyTechnicalSpecifications4.5.2.g,4.5.2.hand4.5.2.i.b)ZeroFlowCondition:TechnicalSpecification4.5.2.gsurveillancetestingoftheHPSIpumpsconsistsofaverificationthatthepumps'otaldevelopedheadisgreaterthanorequalto2854ft.onrecirculationflow.Theinstrumentusedtomeasurethisparameterhasatotaluncertaintyofapproximately0.9%fullscale.TheSBLOCAanalysisuses0gpminjectionflowataRCSpressureof1214psia.Thisanalysisvalueprovidesamarginofapproximately53ft.(or1.2%fullscale)totheTechnicalSpecificationsvalue.Therefore,themargininthesafetyanalysisvalueissufficienttoaccommodatetheassociatedinstrumentuncertainty.
FPLLetterL-99-195AttachmentPage3of4B.ResonsetoNRCReuestforAdditionalInformation:LOCAAnalsis1.FPLshouldprovideadiscussionofthegeneralphilosophyforinputparametervariancesorinstrumentdrift,uncertainties,inaccuraciesandothervariances,andhowtheyareaccountedforintheLOCAanalysis.~Resonse:Ingeneral,theLOCAanalysisforSt.LucieUnit2presentedinFPLletterL-98-308hasbeenperformedtoachieveresultsthatconservativelyboundexpectedconsequencesforthisevent.ThisconservatismisinherentintheABB-CEevaluationmodelsusedinthisanalysisthathavebeendevelopedandapprovedinaccordancewiththeconservativeacceptablefeaturesforECCSevaluationmodelsdelineatedin10CFR50,AppendixK.Assuch,theABB-CEevaluationmodelsusedinthisanalysisprovidesubstantialmarginsoverrealisticconditionsthataresufficienttoboundvariancesininputparametersincludinginstrumentdrift,uncertaintiesandinaccuracies.Tables7.1.2-1and7.2.2-1ofAttachment2totheenclosurewithL-98-308listthekeyparametersusedintheLOCAanalysisforSt.LucieUnit2.Inadditiontothesubstantialinherentconservatismintheevaluationmodels,theLBLOCAandSBLOCApeakcladdingtemperature(PCT)significantanalysisinputparameterswereselectedtoboundas-operatedplantvaluesincludingvariances.Otherparameters,suchasRCSflowrateandRCSpressure,areusedattheirnominal/referencevaluesasthePCTisnotverysensitivetovariationsinthevaluesoftheseparameters.TheboundingPCTsignificantinputparametersareconservativelyapplieddeterministically,providingfurtherassurancethattheLOCAanalysisresultsprovidemargintotheexpectedconsequencesforthisevent.AspartoftheReloadProcessImprovement(RPI)proposedbythislicenseamendmentFPLusesareloadanalysis"groundrules"processwiththeNon-PhysicsAssessmentChecklist(NPAC)toassurethatallthesafetyanalysis(includingSBLOCAandLBLOCA)input-assumptionsremainboundingfortheplantconfigurationeverycycle.Thisprocessassuresthatanyproposedoractualchangesinplantconfigurationareappropriatelyverifiedtoremainboundedbythereloadsafetyanalysisfortheupcomingfuelcycle.2.FPLshoulddiscussspecificallythehandlingofHPSIflowdrift,uncertainties,andvariancesintheSBLOCAanalysisinput.~Resonse:HPSIflowassumptionsintheSt.LucieUnit2SBLOCAanalysisconservativelyboundactualplantdesignconfigurationvaluessufficientlytocompensateforanyflowmeasurementvariancesduetoinstrumentdrift,uncertaintyandinaccuraciesduringrequiredsurveillances,asdiscussedbelow:a)MaximumFlowCondition:Analysisassumptionsutilizeaconservativeflowdeliverycurvethatassumesathreecoldlegtotalinjectionflowof453gpmat0psiareactorcoolantsystem(RCS)pressure.ThisflowcomparestotheTechnicalSpecification4.5.2.i.1minimumthreecoldlegflow Ii FPLLetterL-99-195AttachmentPage4of4surveillancerequirementof476gpmOadischargeheadof1150to1290ft.A~conservativeallowanceof23gpminthethreelooptotalinjectionflowthusexistsbetweentheanalysisvalueandtheTechnicalSpecificationsminimumrequiredvalue.ThetotalHPSIflowmeasurementuncertaintyiscalculatedtobe18gpmforthecombinedthreeloopflow.Thisuncertaintyincludestheinstrumentloopuncertainty(includingdriftandotherinaccuraciessuchasorificeplatetolerancesandprocesstemperaturevariance)andthrottlevalvepositionvariance(a1/32"stemposition)thatareapplicableduringroutineflowandthrottlevalvepositionverificationsurveillancesrequiredbyTechnicalSpecifications4.5.2.g,4.5.2.hand4.5.2.i.b)ZeroFlowCondition:TechnicalSpecification4.5.2.gsurveillancetestingoftheHPSIpumpsconsistsofaverificationthatthepumps'otaldevelopedheadisgreaterthanorequalto2854ft.onrecirculationflow.Theinstrumentusedtomeasurethisparameterhasatotaluncertaintyofapproximately0.9%fullscale.TheSBLOCAanalysisuses0gpminjectionflowataRCSpressureof1214psia.Thisanalysisvalueprovidesamarginofapproximately53ft.(or1.2%fullscale)totheTechnicalSpecificationsvalue.Therefore,themargininthesafetyanalysisvalueissufficienttoaccommodatetheassociatedinstrumentuncertainty.
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Revision as of 14:49, 18 May 2018

Forwards Info Requested by NRC Staff During 990630 & 0816 Telcons,To Complete Review of Proposed License Amend for Fuel Reload Process Improvement Program
ML17241A458
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 09/13/1999
From: STALL J A
FLORIDA POWER & LIGHT CO.
To:
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-99-195, NUDOCS 9909210166
Download: ML17241A458 (10)
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Text

CATEGORYREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)

SUBJECT:

ForwardsinforequestedbyNRCstaffduring990630&0816telcons,tocompletereviewofproposedlicenseamendforfuelreloadprocessimprovementprogram.DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRJENCLLTITLE:ORSubmittal:GeneralDistributionSIZE:JACCESSIONNBR:9909210166DOC.DATE:99/09/13NOTARIZED:NOB=-ACYL:50-389St.LuciePlant,Unit2,FloridaPower&LightCo.AVWiI.N2@EAUTHORAFFILIATIONSTALL,J.A.FloridaPower&LightCo.RECIP.NAMERECIPIENTAFFILIATIONRecordsManagementBranch(DocumentControlDesk)DOCKET05000389NOTES:RECIPIENTIDCODE/NAMECLAYTON,BSCCOPIESLTTRENCL1111RECIPIENTIDCODE/NAMEGLEAVES,WCOPIESLTTRENCL1,1EINTERNAL:ACRSNRR/DSSA/SPLBNUDOCS-ABSTRACT111111FILECENTER'l11R'/DSSAT/SRZBI1OGC/RP10EXTERNAL:NOAC11NRCPDR11D0'ENOTETOALL"RZDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTETHTOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRZBUTIONLISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION415-2083TOTALNUMBEROF.COPIESREQUIRED:LTTR11ENCL10 taS'4"'i-'>l.a~)~",.ii)/yj~>~.,

FloridaPower&LightCompany,6351S.OceanDrive,JensenBeach,FL34957September13,1999L-99-19510CFR50.90U.S.NuclearRegulatoryCommissionATTN:DocumentControlDeskWashington,DC20555Re:St.LucieUnit2Docket50-389ProposedLicenseAmendmentCycle12ReloadProcessImprovementResonsetoReuestforAdditionalInformationRef:FPLLetterL-98-308:J.A.Stall(FPL)toNRC(DCD),St.LucieUnit2,Docket50-389,ProposedLicenseAmendment,Cycle12ReloadProcessImprovement;December18,1998.TheattachmenttothisletterprovidesinformationrequestedbytheNRCstaffduringtelephoneconversationswithFPLonJune30andAugust16,1999.Theinformationisdeemednecessarytocompletethestafl'sreviewoftheproposedlicenseamendmentforourfuelreloadprocessimprovementprogram.Analyticalresultsandassumptionspertainingtocertainnon-LOCAradiologicaldoses,andadditionalinformationinvolvinginputparametersforthelossofcoolantaccidentanalysisassociatedwiththereferencesubmittalareincluded.Pleasecontactusifthereareanyquestionsabouttheattachedresponseorthereferenceproposedlicenseamendment.Verytrulyyours,J.A.StallVicePresidentSt.LuciePlantJAS/RLDAttachmentCCRegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant(~o99092iOi669909i3.PDRADOCK05000389PP~DRanFPLGroupcompany

~'Fk FPLLetterL-99-195A.InformationRelatedtoNon-LOCADoseCalculationsAttachmentPage1of41.SteamGeneratorSGTubeRutureSGTRSteaminRatesa)Steamreleasedinthefirst30minutes(priortooperatoraction)83,942Ibm(46.6Ibm/sec)82,028Ibm(45.6Ibm/sec)viaMSSVsofAffectedSGviaMSSVsofIntactSGb)Steamreleasedfromtimeofoperatoraction(30minutes)until2hours572,026Ibm(105.9Ibm/sec)viaADVsc)Steamreleasedfromtimeofoperatoraction(30minutes)until8hours1,479,854Ibm(54.8Ibm/sec)viaADVsNOTE:TotalsteamreleasesareshowninTable8.6.3-3oforiginalsubmittal(Attachment2totheenclosurewithFPLLetterL-98-308)12.CalculatedDosesforSGTRandFeed-lineBreakF/BEventsa)SGTRExclusionAreaBoundary(EAB)andLowPopulationZone(LPZ)CalculatedDoses:EAB/2hrLPZ/ShrThyroidPISThyroidGISWholeBody12.0rem2.0rem0.2rem6.0rem8.0rem0.1remb)FLBwithLOACEABandLPZCalculatedDoses:EAB/2hrLPZ/ShrThyroidWholeBody1.56rem<2mrem0.71rem<3mrem FPLLetterL-99-1953.AssumtionsforDoseCalculationsAttachmentPage2of4Theinputassumptionsfornon-LOCAeventsremainunchangedfromthoseinCycle2analysisexceptforthefollowing:a)iodineDoseConversionFactorsusedarefromICRP-30forallre-analyzedevents,exceptforSGTRwhichisconservativelybasedonTID-14844(asnotedinTable8.0-8oforiginalsubmittal,Attachment2totheenclosurewithFPLLetterL-98-308).b)RCSCooldownRatefor8hourdoseis-38'F/hrinsteadof100'F/hrtoconservativelymaximizedoseforre-analyzedevents.c)Maximumallowablelimitsforfuelfailureeventsarebackcalculatedfromdoseacceptancelimits.d)DecontaminationFactor(DF)usedforatmosphericdumpvalvesandmainsteamsafetyvalvesis10insteadof1.There-analysescreditaDFequalto10foreventsthatdonotuncoverthesteamgeneratortubesordonotundergosteamgeneratordryout.Cycle2analysescreditedflashingonaneventspecificbasis,e.g.Cycle2LossofACPowerdoseevaluationusedaDFequalto100forthereleaseoftheinitialactivityfromthesteamgeneratorandaDFequalto1fortheactivityassociatedwiththeprimarytosecondaryleak.NOTE:UFSARTable15.0-19listsparametersusedinCycle2siteboundarydosecalculations.

FPLLetterL-99-195AttachmentPage3of4B.ResonsetoNRCReuestforAdditionalInformation:LOCAAnalsis1.FPLshouldprovideadiscussionofthegeneralphilosophyforinputparametervariancesorinstrumentdrift,uncertainties,inaccuraciesandothervariances,andhowtheyareaccountedforintheLOCAanalysis.~Resonse:Ingeneral,theLOCAanalysisforSt.LucieUnit2presentedinFPLletterL-98-308hasbeenperformedtoachieveresultsthatconservativelyboundexpectedconsequencesforthisevent.ThisconservatismisinherentintheABB-CEevaluationmodelsusedinthisanalysisthathavebeendevelopedandapprovedinaccordancewiththeconservativeacceptablefeaturesforECCSevaluationmodelsdelineatedin10CFR50,AppendixK.Assuch,theABB-CEevaluationmodelsusedinthisanalysisprovidesubstantialmarginsoverrealisticconditionsthataresufficienttoboundvariancesininputparametersincludinginstrumentdrift,uncertaintiesandinaccuracies.Tables7.1.2-1and7.2.2-1ofAttachment2totheenclosurewithL-98-308listthekeyparametersusedintheLOCAanalysisforSt.LucieUnit2.Inadditiontothesubstantialinherentconservatismintheevaluationmodels,theLBLOCAandSBLOCApeakcladdingtemperature(PCT)significantanalysisinputparameterswereselectedtoboundas-operatedplantvaluesincludingvariances.Otherparameters,suchasRCSflowrateandRCSpressure,areusedattheirnominal/referencevaluesasthePCTisnotverysensitivetovariationsinthevaluesoftheseparameters.TheboundingPCTsignificantinputparametersareconservativelyapplieddeterministically,providingfurtherassurancethattheLOCAanalysisresultsprovidemargintotheexpectedconsequencesforthisevent.AspartoftheReloadProcessImprovement(RPI)proposedbythislicenseamendmentFPLusesareloadanalysis"groundrules"processwiththeNon-PhysicsAssessmentChecklist(NPAC)toassurethatallthesafetyanalysis(includingSBLOCAandLBLOCA)input-assumptionsremainboundingfortheplantconfigurationeverycycle.Thisprocessassuresthatanyproposedoractualchangesinplantconfigurationareappropriatelyverifiedtoremainboundedbythereloadsafetyanalysisfortheupcomingfuelcycle.2.FPLshoulddiscussspecificallythehandlingofHPSIflowdrift,uncertainties,andvariancesintheSBLOCAanalysisinput.~Resonse:HPSIflowassumptionsintheSt.LucieUnit2SBLOCAanalysisconservativelyboundactualplantdesignconfigurationvaluessufficientlytocompensateforanyflowmeasurementvariancesduetoinstrumentdrift,uncertaintyandinaccuraciesduringrequiredsurveillances,asdiscussedbelow:a)MaximumFlowCondition:Analysisassumptionsutilizeaconservativeflowdeliverycurvethatassumesathreecoldlegtotalinjectionflowof453gpmat0psiareactorcoolantsystem(RCS)pressure.ThisflowcomparestotheTechnicalSpecification4.5.2.i.1minimumthreecoldlegflow Ii FPLLetterL-99-195AttachmentPage4of4surveillancerequirementof476gpmOadischargeheadof1150to1290ft.A~conservativeallowanceof23gpminthethreelooptotalinjectionflowthusexistsbetweentheanalysisvalueandtheTechnicalSpecificationsminimumrequiredvalue.ThetotalHPSIflowmeasurementuncertaintyiscalculatedtobe18gpmforthecombinedthreeloopflow.Thisuncertaintyincludestheinstrumentloopuncertainty(includingdriftandotherinaccuraciessuchasorificeplatetolerancesandprocesstemperaturevariance)andthrottlevalvepositionvariance(a1/32"stemposition)thatareapplicableduringroutineflowandthrottlevalvepositionverificationsurveillancesrequiredbyTechnicalSpecifications4.5.2.g,4.5.2.hand4.5.2.i.b)ZeroFlowCondition:TechnicalSpecification4.5.2.gsurveillancetestingoftheHPSIpumpsconsistsofaverificationthatthepumps'otaldevelopedheadisgreaterthanorequalto2854ft.onrecirculationflow.Theinstrumentusedtomeasurethisparameterhasatotaluncertaintyofapproximately0.9%fullscale.TheSBLOCAanalysisuses0gpminjectionflowataRCSpressureof1214psia.Thisanalysisvalueprovidesamarginofapproximately53ft.(or1.2%fullscale)totheTechnicalSpecificationsvalue.Therefore,themargininthesafetyanalysisvalueissufficienttoaccommodatetheassociatedinstrumentuncertainty.

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