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St.LucieUnitIDocketNo.50-335L-97-90Page2Thisletterdoesnotcontainanynewregulatorycommitments.FPLispreparedtomeetwiththeNRCtodiscusstheresultsofthisandanyotherpreviouslysubmittedanalyses.Pleasecontactusifyouhaveanyadditionalquestions.Verytrulyyours,J.A.StallVicePresidentSt.LuciePlantJAS/GRMAttachmentscc:RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant St.LucieUnit1DocketNo.50-335L-97-90Attachment1Page1Cycle14SteamGeneratorRuntimeAnalysisfriinlInfinNRCQuestion1RegulatoryGuide(RG)1.78addressestheimpactofchemicalreleasesuponthecontrolroomoperators.ItisstatedinEnclosure3thatthemodelsfordosecalculationweretakenfromthisRG,PleaseclarifyhowthisRGwasutilizedinthisanalysis.FPLResponse1ThisregulatoryGuidewasusedprimarilytocategorizethecontrolroombythetypeofprotectionreferredtoasA,B,orC.Sincetheleaktightnessisindependentofthetypeofairbornematerial,theclassificationsysteminRG1.78providesagoodinitialassessmentofthetypeofprotectioninthedesign.TheformulasfordoseconcentrationwereappliedasrecommendedinRG1.145whichprovidesimprovedmethodsoverRG1.4.NRCQuestion2TheselectionofmeteorologicaldataforSt.Lucieshouldnotbelimitedtoonlyoneyear'worthofdatainordertominimizetheeffectsofannualperturbations.Itisrequestedthataminimumoffiveyearsbeused,orprovidejustificationfortheuseoflessdata.FPLResponse2Weagreethatafiveyearsamplewillproduceabetter.representationofthelocalconditionsneededtoestimatetheX/Qforanysite.InthecaseofSt.Lucietheyearselectedwasclearlyconservativeforselectingthe95%confidencelevel(5%exceedancelevel).For1996thecalculated95%levelwasslightlygreaterthan1E-4,whereasthefiveyearaverageintheFSARwas8.55E-5.Thus,theselectedyearwasconservativeby15%.Asaresultofthisquestionwealsoreviewedthelastfiveyearsofmeteorologicaldatatodeterminethefrequencyofthemostrestrictivestabilityclasses,GandF.WefoundthatthefrequencyforClassGandF(fractionoftimepercentage)waslowerforallyearsthantheselectedyear1995.Theselectedyearof1995istheonlyonewherethetotalfractionofGandFexceed5%.Thus,theselectedyearproducesthemostconservativeX/Qonayearlybasisforthepurposeofthecalculations. | St.LucieUnitIDocketNo.50-335L-97-90Page2Thisletterdoesnotcontainanynewregulatorycommitments.FPLispreparedtomeetwiththeNRCtodiscusstheresultsofthisandanyotherpreviouslysubmittedanalyses.Pleasecontactusifyouhaveanyadditionalquestions.Verytrulyyours,J.A.StallVicePresidentSt.LuciePlantJAS/GRMAttachmentscc:RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant St.LucieUnit1DocketNo.50-335L-97-90Attachment1Page1Cycle14SteamGeneratorRuntimeAnalysisfriinlInfinNRCQuestion1RegulatoryGuide(RG)1.78addressestheimpactofchemicalreleasesuponthecontrolroomoperators.ItisstatedinEnclosure3thatthemodelsfordosecalculationweretakenfromthisRG,PleaseclarifyhowthisRGwasutilizedinthisanalysis.FPLResponse1ThisregulatoryGuidewasusedprimarilytocategorizethecontrolroombythetypeofprotectionreferredtoasA,B,orC.Sincetheleaktightnessisindependentofthetypeofairbornematerial,theclassificationsysteminRG1.78providesagoodinitialassessmentofthetypeofprotectioninthedesign.TheformulasfordoseconcentrationwereappliedasrecommendedinRG1.145whichprovidesimprovedmethodsoverRG1.4.NRCQuestion2TheselectionofmeteorologicaldataforSt.Lucieshouldnotbelimitedtoonlyoneyear'worthofdatainordertominimizetheeffectsofannualperturbations.Itisrequestedthataminimumoffiveyearsbeused,orprovidejustificationfortheuseoflessdata.FPLResponse2Weagreethatafiveyearsamplewillproduceabetter.representationofthelocalconditionsneededtoestimatetheX/Qforanysite.InthecaseofSt.Lucietheyearselectedwasclearlyconservativeforselectingthe95%confidencelevel(5%exceedancelevel).For1996thecalculated95%levelwasslightlygreaterthan1E-4,whereasthefiveyearaverageintheFSARwas8.55E-5.Thus,theselectedyearwasconservativeby15%.Asaresultofthisquestionwealsoreviewedthelastfiveyearsofmeteorologicaldatatodeterminethefrequencyofthemostrestrictivestabilityclasses,GandF.WefoundthatthefrequencyforClassGandF(fractionoftimepercentage)waslowerforallyearsthantheselectedyear1995.Theselectedyearof1995istheonlyonewherethetotalfractionofGandFexceed5%.Thus,theselectedyearproducesthemostconservativeX/Qonayearlybasisforthepurposeofthecalculations. | ||
St.LucieUnit1DocketNo.50-335L-97-90Attachment1Page2Table1ReviewofmeteoroloicaldataforSt.LucieYear1991(avebyquarter)%ClassF3.509%ClassG0.77119923.4701.15319933.4480.9521994(avebyquarter)1995usedinanalsis)FiveYearAverae2.724.7853.3860.452.4840.962NRCQuestion3ThemannerinwhichthecontrolroomengineeredsafetyfeaturesystemwasdescribedasoperatingisdifferentthanthatdescribedinNUREG/CR4191,"SurveyofLicenseeControlRoomHabitabilityPractices."Itisnotclearwhetherthecontrolroomwasincorrectlymodeledorthemannerofoperationwaschanged.Pleaseexplain.FPLResponse3ThecontrolroomatSt.LucieUnit1meetstheobjectivesinthechecklistitemsinNUREG/CR4191.Periodicscheduledtestingindicatesthatanairexchangerateoflessthan0.25volume/hourduringanisolatedconditionproducesacontrolroompressureof1/8incheswater.Forthereferenceprobabilisticassessmentcalculationamodelwasusedwhichlumpedallinputsandoutputsintosingleparameters.Thetailsofthedistributionweretakenaslargeenoughtocovervariationintiming.Theprobabilisticassessmentusedrealisticdesignvaluesfortheparametersandthenassignedrangestoassessvariationsinthevalues.DatafortherealisticoperationarenotnecessarilythesameastheconservativevaluesusedforaccidentanalysisassumptionsinChapter15wheretheloss-'of-coolant-accident(LOCA)sourcetermisexpectedtoboundotheraccidentdosesforthecontrolroom.Hence,thesimplifiedprobabilisticmodelingapproachshowssignificantmarginovertheassumptionsusedintheSRPtypeanalysiswhichaccountsforcontrolroomfeaturesusingaccidentboundingassumptions. | St.LucieUnit1DocketNo.50-335L-97-90Attachment1Page2Table1ReviewofmeteoroloicaldataforSt.LucieYear1991(avebyquarter)%ClassF3.509%ClassG0.77119923.4701.15319933.4480.9521994(avebyquarter)1995usedinanalsis)FiveYearAverae2.724.7853.3860.452.4840.962NRCQuestion3ThemannerinwhichthecontrolroomengineeredsafetyfeaturesystemwasdescribedasoperatingisdifferentthanthatdescribedinNUREG/CR4191,"SurveyofLicenseeControlRoomHabitabilityPractices."Itisnotclearwhetherthecontrolroomwasincorrectlymodeledorthemannerofoperationwaschanged.Pleaseexplain.FPLResponse3ThecontrolroomatSt.LucieUnit1meetstheobjectivesinthechecklistitemsinNUREG/CR4191.Periodicscheduledtestingindicatesthatanairexchangerateoflessthan0.25volume/hourduringanisolatedconditionproducesacontrolroompressureof1/8incheswater.Forthereferenceprobabilisticassessmentcalculationamodelwasusedwhichlumpedallinputsandoutputsintosingleparameters.Thetailsofthedistributionweretakenaslargeenoughtocovervariationintiming.Theprobabilisticassessmentusedrealisticdesignvaluesfortheparametersandthenassignedrangestoassessvariationsinthevalues.DatafortherealisticoperationarenotnecessarilythesameastheconservativevaluesusedforaccidentanalysisassumptionsinChapter15wheretheloss-'of-coolant-accident(LOCA)sourcetermisexpectedtoboundotheraccidentdosesforthecontrolroom.Hence,thesimplifiedprobabilisticmodelingapproachshowssignificantmarginovertheassumptionsusedintheSRPtypeanalysiswhichaccountsforcontrolroomfeaturesusingaccidentboundingassumptions. | ||
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Revision as of 16:27, 18 May 2018
ML17229A296 | |
Person / Time | |
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Site: | Saint Lucie |
Issue date: | 04/04/1997 |
From: | STALL J A FLORIDA POWER & LIGHT CO. |
To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
Shared Package | |
ML17229A297 | List: |
References | |
RTR-NUREG-0800, RTR-NUREG-800, RTR-REGGD-01.121, RTR-REGGD-1.121 GL-95-05, GL-95-5, L-97-90, NUDOCS 9704100055 | |
Download: ML17229A296 (8) | |
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4,CATEGORY1REGULATINFORMATIONDISTRZBUTZONII.'STEM(RIDE)ACCESSIONNBR:9704100055DOC.DATE:97/04/04NOTARIZED:NODOCKETFACIL:50-335St.LuciePlant,Unit1,FloridaPowerSLightCo.05000335AUTH.NAMEAUTHORAFFILIATIONSTALL,J.A.FloridaPower&LightCo.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)
SUBJECT:
Providesresponseto'NRCRAIdtd970123recycle14SGruntimeanalysisadoseasssessmentusingStdReviewPlanSection15.1.5methodology.DISTRIBUTIONCODE:A001DCOPIESRECEIVED:LTRENCLSIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:ERECIPIENTIDCODE/NAMEPD2-3LAWIENS,L.INTERNAL:ACRSNRR/DE/ECGB/ANRR/DRCH/HICBNRR/DSSA/SRXBOGC/HDS3EXTERNAL:NOACCOPIESLTTRENCL1111111111111011RECIPIENTIDCODE/NAMEPD2-3PD~ECENTEROl.RR/DEEMCBNRR/DSSA/SPLBNUDOCS-ABSTRACTNRCPDRCOPIESLTTRENCL111111111111DENOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRlBUTIONLISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION415-2083TOTALNUMBEROFCOPIESREQUIRED:LTTR14ENCL13 0C~4'lTIUi FloridaPower&LightCompany,6501SouthOceanDrive,JensenBeach,FL34957April4,1997L-97-9010CFR50.4U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555.RE:St.LucieUnit1DocketNo.50-335RequestforAdditionalInformationNo.1rRAttachment1providestheFloridaPowerEcLightCompany(FPL)responsetotheNRCrequestforadditionalinformation(RAI)datedJanuary,23,1997.FPLletter,L-97-47datedFebruary21,1997,notifiedtheNRCofthescheduleforprovidingtherequestedinformation.Attachment2providestheSt.LucieUnit1doseassessmentusingStandardReviewPlanSection15.1.5methodology.Thedoseassessment,preparedbyScientificApplicationsInternationalCorporation(SAIC)forFPL,isSAICreport,SAIC-97-1008,AnalysisoftheRadiologicalConsequencesofaMainSteamLineBreakOutsideContainmentfortheSt.LucieUnitINuclearPowerPlantUsingiVUREG-0800StandardReviewPlan15.1.5AppendixA,datedMarch14,1997.Thereportprovidesadosecalculationforaonegpmprimarytosecondaryleakforapostulatedmainsteamlinebreak(MSLB)outsidecontainment.Thedoseswerenormalizedtoonegpmsothatotherdosescouldbedeterminedbylinearextrapolationforhigherleakrates.Theresultsshowthat,forthepostulatedMSLBwithinducedsteamgeneratortubeleakagefollowing15monthsofoperation(approximatelythreegpmleakrate),theresultingdoseisconsideredacceptableunderthependingsteamgeneratorrulemakingcriteria,inthattheresultsdonotexceedthe10CFR100and10CFR50AppendixAgeneraldesigncriteria(GDC)19accidentdoselimits.DuringaJuly3,1996,meetingwiththeNRC,FloridaPowerandLightCompany(FPL)committedtoprovidetheresultsoftheSt.LucieUnit1steamgeneratorruntimeanalysistotheNRCwithin90daysofthestartupfromthe1996refuelingoutage(SL1-14).FPLletterL-96-273datedOctober24,1996,providedFPL'splanstooperatetheUnit1steamgeneratorsforfifteen(13)months(i.e.,throughOctober23,1997).TheruntimeanalysiswasaphysicallybasedanalysisthatusedtheguidancecontainedinDraftRegulatoryGuide(RG)1.121,GenericLetter-I95-05,andtheDraftRegulatoryGuide,SteamGeneratorTubeIntegrity.9704i00055970404PDRADOCK,05000335F'DRanFPLGroupcompanylll13llllllllllllllillljlllllllIiHllIllllllll tIta.
St.LucieUnitIDocketNo.50-335L-97-90Page2Thisletterdoesnotcontainanynewregulatorycommitments.FPLispreparedtomeetwiththeNRCtodiscusstheresultsofthisandanyotherpreviouslysubmittedanalyses.Pleasecontactusifyouhaveanyadditionalquestions.Verytrulyyours,J.A.StallVicePresidentSt.LuciePlantJAS/GRMAttachmentscc:RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant St.LucieUnit1DocketNo.50-335L-97-90Attachment1Page1Cycle14SteamGeneratorRuntimeAnalysisfriinlInfinNRCQuestion1RegulatoryGuide(RG)1.78addressestheimpactofchemicalreleasesuponthecontrolroomoperators.ItisstatedinEnclosure3thatthemodelsfordosecalculationweretakenfromthisRG,PleaseclarifyhowthisRGwasutilizedinthisanalysis.FPLResponse1ThisregulatoryGuidewasusedprimarilytocategorizethecontrolroombythetypeofprotectionreferredtoasA,B,orC.Sincetheleaktightnessisindependentofthetypeofairbornematerial,theclassificationsysteminRG1.78providesagoodinitialassessmentofthetypeofprotectioninthedesign.TheformulasfordoseconcentrationwereappliedasrecommendedinRG1.145whichprovidesimprovedmethodsoverRG1.4.NRCQuestion2TheselectionofmeteorologicaldataforSt.Lucieshouldnotbelimitedtoonlyoneyear'worthofdatainordertominimizetheeffectsofannualperturbations.Itisrequestedthataminimumoffiveyearsbeused,orprovidejustificationfortheuseoflessdata.FPLResponse2Weagreethatafiveyearsamplewillproduceabetter.representationofthelocalconditionsneededtoestimatetheX/Qforanysite.InthecaseofSt.Lucietheyearselectedwasclearlyconservativeforselectingthe95%confidencelevel(5%exceedancelevel).For1996thecalculated95%levelwasslightlygreaterthan1E-4,whereasthefiveyearaverageintheFSARwas8.55E-5.Thus,theselectedyearwasconservativeby15%.Asaresultofthisquestionwealsoreviewedthelastfiveyearsofmeteorologicaldatatodeterminethefrequencyofthemostrestrictivestabilityclasses,GandF.WefoundthatthefrequencyforClassGandF(fractionoftimepercentage)waslowerforallyearsthantheselectedyear1995.Theselectedyearof1995istheonlyonewherethetotalfractionofGandFexceed5%.Thus,theselectedyearproducesthemostconservativeX/Qonayearlybasisforthepurposeofthecalculations.
St.LucieUnit1DocketNo.50-335L-97-90Attachment1Page2Table1ReviewofmeteoroloicaldataforSt.LucieYear1991(avebyquarter)%ClassF3.509%ClassG0.77119923.4701.15319933.4480.9521994(avebyquarter)1995usedinanalsis)FiveYearAverae2.724.7853.3860.452.4840.962NRCQuestion3ThemannerinwhichthecontrolroomengineeredsafetyfeaturesystemwasdescribedasoperatingisdifferentthanthatdescribedinNUREG/CR4191,"SurveyofLicenseeControlRoomHabitabilityPractices."Itisnotclearwhetherthecontrolroomwasincorrectlymodeledorthemannerofoperationwaschanged.Pleaseexplain.FPLResponse3ThecontrolroomatSt.LucieUnit1meetstheobjectivesinthechecklistitemsinNUREG/CR4191.Periodicscheduledtestingindicatesthatanairexchangerateoflessthan0.25volume/hourduringanisolatedconditionproducesacontrolroompressureof1/8incheswater.Forthereferenceprobabilisticassessmentcalculationamodelwasusedwhichlumpedallinputsandoutputsintosingleparameters.Thetailsofthedistributionweretakenaslargeenoughtocovervariationintiming.Theprobabilisticassessmentusedrealisticdesignvaluesfortheparametersandthenassignedrangestoassessvariationsinthevalues.DatafortherealisticoperationarenotnecessarilythesameastheconservativevaluesusedforaccidentanalysisassumptionsinChapter15wheretheloss-'of-coolant-accident(LOCA)sourcetermisexpectedtoboundotheraccidentdosesforthecontrolroom.Hence,thesimplifiedprobabilisticmodelingapproachshowssignificantmarginovertheassumptionsusedintheSRPtypeanalysiswhichaccountsforcontrolroomfeaturesusingaccidentboundingassumptions.
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