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{{#Wiki_filter: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)
{{#Wiki_filter:ACCELERATED DIS7RIBUTION DEMONSTRATION SYSTEM~"0REGULATORY INFORMATXON DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9112020147 DOC.DATE:91/11/22NOTARIZED:
NOFACIL:50-335 St.LuciePlant,Unit1,FloridaPower&LightCo.50-389St.LuciePlant,Unit2,FloridaPower&LightCo.AUTH.NAMEAUTHORAFFILIATION SAGER,D.A.
FloridaPower&LightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)


==SUBJECT:==
==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  
Requeststhat,NRCreconsider 900830&1106denialsofamendrequ'ests relatingtomoderator tempcoefficient
~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}}
&fulllengthcontrolelementassemblysurveillance requirements.
DISTRIBUTION CODE:AOOIDCOPIESRECEIVED:LTR 3ENCL0SIZE:TITLE:ORSubmittal:
GeneralDistribution NOTES:DOCKET0500033505000389DRECIPIENT IDCODE/NAME PD2-2LANORRIS,JINTERNAL:
ACRSNRR/DET/ESGB NRR/DST8E2NRR/DST/SICB8H7 NUDOCS-ABSTRACT OGC/HDS3RES/DSIR/EIB EXTERNAL:
NRCPDRCOPIESLTTRENCLRECIPIENT XDCODE/NAME PD2-2PDNRR/DET/ECMB 7DNRR/DOEA/OTSB11 NRR/DST/SELB 7ENRR/DST/SRXB 8EO~C&ggCBEG01NSICCOPIESLTTRENCLDDRDNOTETOALL"RIDS"RECIPIENTS:
DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!TOTALNUMBEROFCOPXESREQUIRED:
LTTR24ENCL p.0.Box12o,.Pierce,FL34954-0128 November22,1991L-91-27510CFR50.3610CFR50.9010CFR50.92U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, DC20555Gentlemen:
Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendment RequestsRelatingtotheModerator Temperature Coefficient andFullLengthControlElementAssemblySurveillance Requirements FloridaPowerandLightCompany(FPL)requeststhattheNRCreconsider itsdenialsoftheModerator Temperature Coefficient (MTC)andFullLengthControlElementAssembly(FLCEA)proposedamendments transmitted toFPLbylettersdatedAugust30,1991,andJanuary31,1991,respectively.
Thepurposeoftheseamendments wasdiscussed onNovember6,1991inameetingbetweenNRCmanagement andSt.Luciemanagement personnel.
Sincethemid-1980s, FPLhashadinplaceareactortripandplanttransient reduction programwhichhasgreatlyreducedthenumberofreactortripsatSt.Lucie.TheMTCandFLCEAproposedamendments are.acontinuation'f thisprogram.Whiletheassociated surveillances todatehavenotcausedreactortrips,theyeachhaveledtodroppedcontrolelementassemblies, eventsthatweconsiderpotential reactortripprecursors.
Therefore, FPLfeelsthatitisimportant tocontinueeffortsonthesetypesofimprovements toreducechallenges tosafetysystems.FPLoriginally submitted theMTCproposedamendment onDecember22,.1987.Thisproposedamendment wouldremovetherequirement fora300ppmboronMTCsurveillance ifsatisfactory resultswereobtainedearlierinthefuelcycle.Thissurveillance, whichisaninfrequent evolution, placesthereactorinanabnormalconfiguration andexposesittothepotential fordroppedCEAs.Znfact,aCEAwasdroppedwhilemovingCEAsduringthemostrecentSt.LucieUnit1surveillance.
TheNRChasreviewedthisamendment extensively, anditisourunderstanding thatitwasfoundacceptable fromatechnical standpoint.
9ii2020i47 9iii22;yPDRADOCK05000335pPDRanFPLGroupcompany  
~w'Ii'6 I~Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendment RequestsRelatingtotheModerator Temperature Coefficient andFullLengthControlElementAssemblySurveillance Requirements Page,2.FPLsubmitted theFLCEAproposedamendment onFebruary12,1990.Thisproposedchangewouldallow'ortheextension ofthesurveillance intervalfortheserequirements fromonceper31daystoonceper92days.Inthepast,performance ofthissurveillance hasledtodroppedCEAsonbothSt.,Lucieunits.Additionally, ithasdemonstrated onlylimitedvalueindetecting stuckCEAssincemoststuckCEAsarediscovered priortoorduringreactorstartupandnotduringtheperformance ofthissurveillance.
Thischangeinfrequency issupported indraftNUREG-1366 "Improvements toTechnical Specification Surveillance Requirements".
FPLiscontinuing ourimprovement processfortripandtransient reduction andisplanningtosubmitotheramendments thatwouldalsoreducetheriskforreactortripsandtransients.
Oneamendment wouldprovide'for bypassing ofaHighStartupRatetripchannelforperiodslongerthan48hoursonSt.LucieUnit1.Wearealsopursuinganamendment toincreasetheLossofLoadenablesetpointfrom15%to254.1Insummary,FPLisconcerned thatthesafetyimprovement associated withtheseTechnical Specification changeswill.notoccuriftheseamendments arenotreviewedontheirowntechnical meritandtheoverallcontextinwhichtheyarebeingsubmitted.
FPLrequeststhat,theNRCreconsider theirdenialsandreviewtheMTCandFLCEAproposedamendments.
U'erytrulyyours,D.A.ViceSt.geresidentiePlantDAS:LLM:kw DAS/PSL0568-91cc:JamesG.Partlow,Associate DirectorforProjects, USNRCStevenA.Varga,DirectorDivisionofReactorProjects-I/II, USNRCGusC.Lainas,Assistant Director'or RegionIIReactors,,
USNRCStewartD.Ebneter,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlant}}

Revision as of 11:00, 29 June 2018

Requests That NRC Reconsider 900830 & 1106 Denials of Amend Requests Relating to Moderator Temp Coefficient & Full Length Control Element Assembly Surveillance Requirements
ML17309A668
Person / Time
Site: Saint Lucie  NextEra Energy icon.png
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

ACCELERATED DIS7RIBUTION DEMONSTRATION SYSTEM~"0REGULATORY INFORMATXON DISTRIBUTION SYSTEM(RIDS)ACCESSION NBR:9112020147 DOC.DATE:91/11/22NOTARIZED:

NOFACIL:50-335 St.LuciePlant,Unit1,FloridaPower&LightCo.50-389St.LuciePlant,Unit2,FloridaPower&LightCo.AUTH.NAMEAUTHORAFFILIATION SAGER,D.A.

FloridaPower&LightCo.RECIP.NAME RECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)

SUBJECT:

Requeststhat,NRCreconsider 900830&1106denialsofamendrequ'ests relatingtomoderator tempcoefficient

&fulllengthcontrolelementassemblysurveillance requirements.

DISTRIBUTION CODE:AOOIDCOPIESRECEIVED:LTR 3ENCL0SIZE:TITLE:ORSubmittal:

GeneralDistribution NOTES:DOCKET0500033505000389DRECIPIENT IDCODE/NAME PD2-2LANORRIS,JINTERNAL:

ACRSNRR/DET/ESGB NRR/DST8E2NRR/DST/SICB8H7 NUDOCS-ABSTRACT OGC/HDS3RES/DSIR/EIB EXTERNAL:

NRCPDRCOPIESLTTRENCLRECIPIENT XDCODE/NAME PD2-2PDNRR/DET/ECMB 7DNRR/DOEA/OTSB11 NRR/DST/SELB 7ENRR/DST/SRXB 8EO~C&ggCBEG01NSICCOPIESLTTRENCLDDRDNOTETOALL"RIDS"RECIPIENTS:

DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATE YOURNAMEFROMDISTRIBUTION LISTSFORDOCUMENTS YOUDON'TNEED!TOTALNUMBEROFCOPXESREQUIRED:

LTTR24ENCL p.0.Box12o,.Pierce,FL34954-0128 November22,1991L-91-27510CFR50.3610CFR50.9010CFR50.92U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, DC20555Gentlemen:

Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendment RequestsRelatingtotheModerator Temperature Coefficient andFullLengthControlElementAssemblySurveillance Requirements FloridaPowerandLightCompany(FPL)requeststhattheNRCreconsider itsdenialsoftheModerator Temperature Coefficient (MTC)andFullLengthControlElementAssembly(FLCEA)proposedamendments transmitted toFPLbylettersdatedAugust30,1991,andJanuary31,1991,respectively.

Thepurposeoftheseamendments wasdiscussed onNovember6,1991inameetingbetweenNRCmanagement andSt.Luciemanagement personnel.

Sincethemid-1980s, FPLhashadinplaceareactortripandplanttransient reduction programwhichhasgreatlyreducedthenumberofreactortripsatSt.Lucie.TheMTCandFLCEAproposedamendments are.acontinuation'f thisprogram.Whiletheassociated surveillances todatehavenotcausedreactortrips,theyeachhaveledtodroppedcontrolelementassemblies, eventsthatweconsiderpotential reactortripprecursors.

Therefore, FPLfeelsthatitisimportant tocontinueeffortsonthesetypesofimprovements toreducechallenges tosafetysystems.FPLoriginally submitted theMTCproposedamendment onDecember22,.1987.Thisproposedamendment wouldremovetherequirement fora300ppmboronMTCsurveillance ifsatisfactory resultswereobtainedearlierinthefuelcycle.Thissurveillance, whichisaninfrequent evolution, placesthereactorinanabnormalconfiguration andexposesittothepotential fordroppedCEAs.Znfact,aCEAwasdroppedwhilemovingCEAsduringthemostrecentSt.LucieUnit1surveillance.

TheNRChasreviewedthisamendment extensively, anditisourunderstanding thatitwasfoundacceptable fromatechnical standpoint.

9ii2020i47 9iii22;yPDRADOCK05000335pPDRanFPLGroupcompany

~w'Ii'6 I~Re:St.LucieUnits1and2DocketNos.50-335and50-389DenialofAmendment RequestsRelatingtotheModerator Temperature Coefficient andFullLengthControlElementAssemblySurveillance Requirements Page,2.FPLsubmitted theFLCEAproposedamendment onFebruary12,1990.Thisproposedchangewouldallow'ortheextension ofthesurveillance intervalfortheserequirements fromonceper31daystoonceper92days.Inthepast,performance ofthissurveillance hasledtodroppedCEAsonbothSt.,Lucieunits.Additionally, ithasdemonstrated onlylimitedvalueindetecting stuckCEAssincemoststuckCEAsarediscovered priortoorduringreactorstartupandnotduringtheperformance ofthissurveillance.

Thischangeinfrequency issupported indraftNUREG-1366 "Improvements toTechnical Specification Surveillance Requirements".

FPLiscontinuing ourimprovement processfortripandtransient reduction andisplanningtosubmitotheramendments thatwouldalsoreducetheriskforreactortripsandtransients.

Oneamendment wouldprovide'for bypassing ofaHighStartupRatetripchannelforperiodslongerthan48hoursonSt.LucieUnit1.Wearealsopursuinganamendment toincreasetheLossofLoadenablesetpointfrom15%to254.1Insummary,FPLisconcerned thatthesafetyimprovement associated withtheseTechnical Specification changeswill.notoccuriftheseamendments arenotreviewedontheirowntechnical meritandtheoverallcontextinwhichtheyarebeingsubmitted.

FPLrequeststhat,theNRCreconsider theirdenialsandreviewtheMTCandFLCEAproposedamendments.

U'erytrulyyours,D.A.ViceSt.geresidentiePlantDAS:LLM:kw DAS/PSL0568-91cc:JamesG.Partlow,Associate DirectorforProjects, USNRCStevenA.Varga,DirectorDivisionofReactorProjects-I/II, USNRCGusC.Lainas,Assistant Director'or RegionIIReactors,,

USNRCStewartD.Ebneter,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlant