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Requeststhat,NRCreconsider900830&1106denialsofamendrequ'estsrelatingtomoderatortempcoefficient&fulllengthcontrolelementassemblysurveillancerequirements.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTR3ENCL0SIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:DOCKET0500033505000389DRECIPIENTIDCODE/NAMEPD2-2LANORRIS,JINTERNAL:ACRSNRR/DET/ESGBNRR/DST8E2NRR/DST/SICB8H7NUDOCS-ABSTRACTOGC/HDS3RES/DSIR/EIBEXTERNAL:NRCPDRCOPIESLTTRENCLRECIPIENTXDCODE/NAMEPD2-2PDNRR/DET/ECMB7DNRR/DOEA/OTSB11NRR/DST/SELB7ENRR/DST/SRXB8EO~C&ggCBEG01NSICCOPIESLTTRENCLDDRDNOTETOALL"RIDS"RECIPIENTS:DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPXESREQUIRED:LTTR24ENCL p.0.Box12o,.Pierce,FL34954-0128November22,1991L-91-27510CFR50.3610CFR50.9010CFR50.92U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,DC20555Gentlemen:Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendmentRequestsRelatingtotheModeratorTemperatureCoefficientandFullLengthControlElementAssemblySurveillanceRequirementsFloridaPowerandLightCompany(FPL)requeststhattheNRCreconsideritsdenialsoftheModeratorTemperatureCoefficient(MTC)andFullLengthControlElementAssembly(FLCEA)proposedamendmentstransmittedtoFPLbylettersdatedAugust30,1991,andJanuary31,1991,respectively.ThepurposeoftheseamendmentswasdiscussedonNovember6,1991inameetingbetweenNRCmanagementandSt.Luciemanagementpersonnel.Sincethemid-1980s,FPLhashadinplaceareactortripandplanttransientreductionprogramwhichhasgreatlyreducedthenumberofreactortripsatSt.Lucie.TheMTCandFLCEAproposedamendmentsare.acontinuation'fthisprogram.Whiletheassociatedsurveillancestodatehavenotcausedreactortrips,theyeachhaveledtodroppedcontrolelementassemblies,eventsthatweconsiderpotentialreactortripprecursors.Therefore,FPLfeelsthatitisimportanttocontinueeffortsonthesetypesofimprovementstoreducechallengestosafetysystems.FPLoriginallysubmittedtheMTCproposedamendmentonDecember22,.1987.Thisproposedamendmentwouldremovetherequirementfora300ppmboronMTCsurveillanceifsatisfactoryresultswereobtainedearlierinthefuelcycle.Thissurveillance,whichisaninfrequentevolution,placesthereactorinanabnormalconfigurationandexposesittothepotentialfordroppedCEAs.Znfact,aCEAwasdroppedwhilemovingCEAsduringthemostrecentSt.LucieUnit1surveillance.TheNRChasreviewedthisamendmentextensively,anditisourunderstandingthatitwasfoundacceptablefromatechnicalstandpoint.9ii2020i479iii22;yPDRADOCK05000335pPDRanFPLGroupcompany | Requeststhat,NRCreconsider900830&1106denialsofamendrequ'estsrelatingtomoderatortempcoefficient&fulllengthcontrolelementassemblysurveillancerequirements.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTR3ENCL0SIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:DOCKET0500033505000389DRECIPIENTIDCODE/NAMEPD2-2LANORRIS,JINTERNAL:ACRSNRR/DET/ESGBNRR/DST8E2NRR/DST/SICB8H7NUDOCS-ABSTRACTOGC/HDS3RES/DSIR/EIBEXTERNAL:NRCPDRCOPIESLTTRENCLRECIPIENTXDCODE/NAMEPD2-2PDNRR/DET/ECMB7DNRR/DOEA/OTSB11NRR/DST/SELB7ENRR/DST/SRXB8EO~C&ggCBEG01NSICCOPIESLTTRENCLDDRDNOTETOALL"RIDS"RECIPIENTS:DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPXESREQUIRED:LTTR24ENCL p.0.Box12o,.Pierce,FL34954-0128November22,1991L-91-27510CFR50.3610CFR50.9010CFR50.92U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,DC20555Gentlemen:Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendmentRequestsRelatingtotheModeratorTemperatureCoefficientandFullLengthControlElementAssemblySurveillanceRequirementsFloridaPowerandLightCompany(FPL)requeststhattheNRCreconsideritsdenialsoftheModeratorTemperatureCoefficient(MTC)andFullLengthControlElementAssembly(FLCEA)proposedamendmentstransmittedtoFPLbylettersdatedAugust30,1991,andJanuary31,1991,respectively.ThepurposeoftheseamendmentswasdiscussedonNovember6,1991inameetingbetweenNRCmanagementandSt.Luciemanagementpersonnel.Sincethemid-1980s,FPLhashadinplaceareactortripandplanttransientreductionprogramwhichhasgreatlyreducedthenumberofreactortripsatSt.Lucie.TheMTCandFLCEAproposedamendmentsare.acontinuation'fthisprogram.Whiletheassociatedsurveillancestodatehavenotcausedreactortrips,theyeachhaveledtodroppedcontrolelementassemblies,eventsthatweconsiderpotentialreactortripprecursors.Therefore,FPLfeelsthatitisimportanttocontinueeffortsonthesetypesofimprovementstoreducechallengestosafetysystems.FPLoriginallysubmittedtheMTCproposedamendmentonDecember22,.1987.Thisproposedamendmentwouldremovetherequirementfora300ppmboronMTCsurveillanceifsatisfactoryresultswereobtainedearlierinthefuelcycle.Thissurveillance,whichisaninfrequentevolution,placesthereactorinanabnormalconfigurationandexposesittothepotentialfordroppedCEAs.Znfact,aCEAwasdroppedwhilemovingCEAsduringthemostrecentSt.LucieUnit1surveillance.TheNRChasreviewedthisamendmentextensively,anditisourunderstandingthatitwasfoundacceptablefromatechnicalstandpoint.9ii2020i479iii22;yPDRADOCK05000335pPDRanFPLGroupcompany | ||
~w'Ii'6 I~Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendmentRequestsRelatingtotheModeratorTemperatureCoefficientandFullLengthControlElementAssemblySurveillanceRequirementsPage,2.FPLsubmittedtheFLCEAproposedamendmentonFebruary12,1990.Thisproposedchangewouldallow'ortheextensionofthesurveillanceintervalfortheserequirementsfromonceper31daystoonceper92days.Inthepast,performanceofthissurveillancehasledtodroppedCEAsonbothSt.,Lucieunits.Additionally,ithasdemonstratedonlylimitedvalueindetectingstuckCEAssincemoststuckCEAsarediscoveredpriortoorduringreactorstartupandnotduringtheperformanceofthissurveillance.ThischangeinfrequencyissupportedindraftNUREG-1366"ImprovementstoTechnicalSpecificationSurveillanceRequirements".FPLiscontinuingourimprovementprocessfortripandtransientreductionandisplanningtosubmitotheramendmentsthatwouldalsoreducetheriskforreactortripsandtransients.Oneamendmentwouldprovide'forbypassingofaHighStartupRatetripchannelforperiodslongerthan48hoursonSt.LucieUnit1.WearealsopursuinganamendmenttoincreasetheLossofLoadenablesetpointfrom15%to254.1Insummary,FPLisconcernedthatthesafetyimprovementassociatedwiththeseTechnicalSpecificationchangeswill.notoccuriftheseamendmentsarenotreviewedontheirowntechnicalmeritandtheoverallcontextinwhichtheyarebeingsubmitted.FPLrequeststhat,theNRCreconsidertheirdenialsandreviewtheMTCandFLCEAproposedamendments.U'erytrulyyours,D.A.ViceSt.geresidentiePlantDAS:LLM:kwDAS/PSL0568-91cc:JamesG.Partlow,AssociateDirectorforProjects,USNRCStevenA.Varga,DirectorDivisionofReactorProjects-I/II,USNRCGusC.Lainas,AssistantDirector'orRegionIIReactors,,USNRCStewartD.Ebneter,RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant | ~w'Ii'6 I~Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendmentRequestsRelatingtotheModeratorTemperatureCoefficientandFullLengthControlElementAssemblySurveillanceRequirementsPage,2.FPLsubmittedtheFLCEAproposedamendmentonFebruary12,1990.Thisproposedchangewouldallow'ortheextensionofthesurveillanceintervalfortheserequirementsfromonceper31daystoonceper92days.Inthepast,performanceofthissurveillancehasledtodroppedCEAsonbothSt.,Lucieunits.Additionally,ithasdemonstratedonlylimitedvalueindetectingstuckCEAssincemoststuckCEAsarediscoveredpriortoorduringreactorstartupandnotduringtheperformanceofthissurveillance.ThischangeinfrequencyissupportedindraftNUREG-1366"ImprovementstoTechnicalSpecificationSurveillanceRequirements".FPLiscontinuingourimprovementprocessfortripandtransientreductionandisplanningtosubmitotheramendmentsthatwouldalsoreducetheriskforreactortripsandtransients.Oneamendmentwouldprovide'forbypassingofaHighStartupRatetripchannelforperiodslongerthan48hoursonSt.LucieUnit1.WearealsopursuinganamendmenttoincreasetheLossofLoadenablesetpointfrom15%to254.1Insummary,FPLisconcernedthatthesafetyimprovementassociatedwiththeseTechnicalSpecificationchangeswill.notoccuriftheseamendmentsarenotreviewedontheirowntechnicalmeritandtheoverallcontextinwhichtheyarebeingsubmitted.FPLrequeststhat,theNRCreconsidertheirdenialsandreviewtheMTCandFLCEAproposedamendments.U'erytrulyyours,D.A.ViceSt.geresidentiePlantDAS:LLM:kwDAS/PSL0568-91cc:JamesG.Partlow,AssociateDirectorforProjects,USNRCStevenA.Varga,DirectorDivisionofReactorProjects-I/II,USNRCGusC.Lainas,AssistantDirector'orRegionIIReactors,,USNRCStewartD.Ebneter,RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant}} | ||
}} |
Revision as of 11:26, 18 May 2018
ML17309A668 | |
Person / Time | |
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Site: | Saint Lucie ![]() |
Issue date: | 11/22/1991 |
From: | SAGER D A FLORIDA POWER & LIGHT CO. |
To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
References | |
L-91-275, NUDOCS 9112020147 | |
Download: ML17309A668 (4) | |
Text
ACCELERATEDDIS7RIBUTIONDEMONSTRATIONSYSTEM~"0REGULATORYINFORMATXONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9112020147DOC.DATE:91/11/22NOTARIZED:NOFACIL:50-335St.LuciePlant,Unit1,FloridaPower&LightCo.50-389St.LuciePlant,Unit2,FloridaPower&LightCo.AUTH.NAMEAUTHORAFFILIATIONSAGER,D.A.FloridaPower&LightCo.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)
SUBJECT:
Requeststhat,NRCreconsider900830&1106denialsofamendrequ'estsrelatingtomoderatortempcoefficient&fulllengthcontrolelementassemblysurveillancerequirements.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTR3ENCL0SIZE:TITLE:ORSubmittal:GeneralDistributionNOTES:DOCKET0500033505000389DRECIPIENTIDCODE/NAMEPD2-2LANORRIS,JINTERNAL:ACRSNRR/DET/ESGBNRR/DST8E2NRR/DST/SICB8H7NUDOCS-ABSTRACTOGC/HDS3RES/DSIR/EIBEXTERNAL:NRCPDRCOPIESLTTRENCLRECIPIENTXDCODE/NAMEPD2-2PDNRR/DET/ECMB7DNRR/DOEA/OTSB11NRR/DST/SELB7ENRR/DST/SRXB8EO~C&ggCBEG01NSICCOPIESLTTRENCLDDRDNOTETOALL"RIDS"RECIPIENTS:DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPXESREQUIRED:LTTR24ENCL p.0.Box12o,.Pierce,FL34954-0128November22,1991L-91-27510CFR50.3610CFR50.9010CFR50.92U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,DC20555Gentlemen:Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendmentRequestsRelatingtotheModeratorTemperatureCoefficientandFullLengthControlElementAssemblySurveillanceRequirementsFloridaPowerandLightCompany(FPL)requeststhattheNRCreconsideritsdenialsoftheModeratorTemperatureCoefficient(MTC)andFullLengthControlElementAssembly(FLCEA)proposedamendmentstransmittedtoFPLbylettersdatedAugust30,1991,andJanuary31,1991,respectively.ThepurposeoftheseamendmentswasdiscussedonNovember6,1991inameetingbetweenNRCmanagementandSt.Luciemanagementpersonnel.Sincethemid-1980s,FPLhashadinplaceareactortripandplanttransientreductionprogramwhichhasgreatlyreducedthenumberofreactortripsatSt.Lucie.TheMTCandFLCEAproposedamendmentsare.acontinuation'fthisprogram.Whiletheassociatedsurveillancestodatehavenotcausedreactortrips,theyeachhaveledtodroppedcontrolelementassemblies,eventsthatweconsiderpotentialreactortripprecursors.Therefore,FPLfeelsthatitisimportanttocontinueeffortsonthesetypesofimprovementstoreducechallengestosafetysystems.FPLoriginallysubmittedtheMTCproposedamendmentonDecember22,.1987.Thisproposedamendmentwouldremovetherequirementfora300ppmboronMTCsurveillanceifsatisfactoryresultswereobtainedearlierinthefuelcycle.Thissurveillance,whichisaninfrequentevolution,placesthereactorinanabnormalconfigurationandexposesittothepotentialfordroppedCEAs.Znfact,aCEAwasdroppedwhilemovingCEAsduringthemostrecentSt.LucieUnit1surveillance.TheNRChasreviewedthisamendmentextensively,anditisourunderstandingthatitwasfoundacceptablefromatechnicalstandpoint.9ii2020i479iii22;yPDRADOCK05000335pPDRanFPLGroupcompany
~w'Ii'6 I~Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendmentRequestsRelatingtotheModeratorTemperatureCoefficientandFullLengthControlElementAssemblySurveillanceRequirementsPage,2.FPLsubmittedtheFLCEAproposedamendmentonFebruary12,1990.Thisproposedchangewouldallow'ortheextensionofthesurveillanceintervalfortheserequirementsfromonceper31daystoonceper92days.Inthepast,performanceofthissurveillancehasledtodroppedCEAsonbothSt.,Lucieunits.Additionally,ithasdemonstratedonlylimitedvalueindetectingstuckCEAssincemoststuckCEAsarediscoveredpriortoorduringreactorstartupandnotduringtheperformanceofthissurveillance.ThischangeinfrequencyissupportedindraftNUREG-1366"ImprovementstoTechnicalSpecificationSurveillanceRequirements".FPLiscontinuingourimprovementprocessfortripandtransientreductionandisplanningtosubmitotheramendmentsthatwouldalsoreducetheriskforreactortripsandtransients.Oneamendmentwouldprovide'forbypassingofaHighStartupRatetripchannelforperiodslongerthan48hoursonSt.LucieUnit1.WearealsopursuinganamendmenttoincreasetheLossofLoadenablesetpointfrom15%to254.1Insummary,FPLisconcernedthatthesafetyimprovementassociatedwiththeseTechnicalSpecificationchangeswill.notoccuriftheseamendmentsarenotreviewedontheirowntechnicalmeritandtheoverallcontextinwhichtheyarebeingsubmitted.FPLrequeststhat,theNRCreconsidertheirdenialsandreviewtheMTCandFLCEAproposedamendments.U'erytrulyyours,D.A.ViceSt.geresidentiePlantDAS:LLM:kwDAS/PSL0568-91cc:JamesG.Partlow,AssociateDirectorforProjects,USNRCStevenA.Varga,DirectorDivisionofReactorProjects-I/II,USNRCGusC.Lainas,AssistantDirector'orRegionIIReactors,,USNRCStewartD.Ebneter,RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant