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{{#Wiki_filter:REGULATORYINFORMATIONDISTRIBUTIONSTEM(RIDS)VQ4ACCEEEION,PIBR:8802260198DOC.DATE:88/02/22NOTARIZED:NOFACIL:50-335St.LuciePlantiUnitiiFloridaPower8cLightCo.AUTH.NAMEAUTHORAFFILIATIONCONWAYeW.F.FloridaPoeer&LightCo.RECIP.NAMERECIPIENTAFFILIATIONDocumentControlBranch(DocumentControlDesk)
{{#Wiki_filter:REGULATORY INFORMATION DISTRIBUTION STEM(RIDS)VQ4ACCEEEION,PIBR:
8802260198 DOC.DATE:88/02/22NOTARIZED:
NOFACIL:50-335St.LuciePlantiUnitiiFloridaPower8cLightCo.AUTH.NAMEAUTHORAFFILIATION CONWAYeW.F.FloridaPoeer&LightCo.RECIP.NAMERECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)


==SUBJECT:==
==SUBJECT:==
Respondsto880107supplementalsafetyevaluationrealternateshutdoencapability.Utilwilladdgeneralnoteinproceduretopermitrestorationofessentialequipshouldbusfeederbreakertripduetofire.DISTRIBUTIONCODE:A006DCOPIESRECEIVED:LTRENCLSIZE:TITLE:OR/LicensingSubmittal:FireProtectionNOTES:DOCKETI05000335RECIPIENTIDCODE/NAMEPD2-2LATOURIQNYrEINTERNAL'CRSNRRWERMEILnJNRR/DESPSBBD1QFE01EXTERNAL'PDRNSICCOPIEBLTTRENCL101133101111111RECIPIENTIDCODE/NAMEPD2-2PDARM/DAF/LFMBNRR/DEBT/ADB7E4OQC15-B-18NRCPDRCOPIEBLTTRENCL5510111011TOTALNUMBEROFCOPIEBREQUIRED:LTTR19ENCL15  
Respondsto880107supplemental safetyevaluation realternate shutdoencapability.
"/i;ji'~t'Mvh0;hajj!'iiltHitII'Ijdjill,I'Itl~Illit~"tlj'li'tflt,f'gII40j'jitII"Jti".>>;'vj,>>Ml,jlTV,"1'"'~<<t'Ihj&#xc3;X,:adl4'..l'l'r'IUEII,v>~5'ID~tjI,"jtIIijItt,'j(t,,'ijPij:ilitlJtt't'llIIjtljj)IIItl P.O.BOX0,JUNOBEACH,FL33408.0420~/Pl>)'6FEBRUNY22f988L-88-89U.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,D.C.20555Gentlemen:Re:St.LucieUnit1DocketNo.50-335AlternateShutdownCaabilitByletterdatedJanuary7,1988(E.G.TourignytoC.0.Woody)NRCtransmittedtheSupplementalSafetyEvaluation(SSE)forSt.LucieUnit1AlternateShutdownCapability.TheSSEsupplementedtheoriginalsafetyevaluationdatedJuly17,1984toaddressafireintheCableSpreadRoom.TheSSEconcludedthatexceptfortwoopenitems,theFloridaPower&LightCompanymethodologyforassuringsafeshutdownforafireintheControlRoomorCableSpreadRoomconformstothecriteriadelineatedinSectionsIII.G.3andIII.L.of10CFR50AppendixRandGenericLetter81-12and86-10.Asrequestedbytheaboveletter,attachedpleasefindFPL'splanstoaddressthefollowingtwoopenitems.TheabsencesofThotindicationonthealternateshutdownpanel,and2~Thelackofananalysisofmultiplehighimpedancefaults.pools8802260198880222PDRADOCN,05000335,'PDRanFPLGroupcompany  
Utilwilladdgeneralnoteinprocedure topermitrestoration ofessential equipshouldbusfeederbreakertripduetofire.DISTRIBUTION CODE:A006DCOPIESRECEIVED:
LTRENCLSIZE:TITLE:OR/Licensing Submittal:
FireProtection NOTES:DOCKETI05000335RECIPIENT IDCODE/NAME PD2-2LATOURIQNYrEINTERNAL'CRS NRRWERMEILnJNRR/DESPSBBD1QFE01EXTERNAL'PDR NSICCOPIEBLTTRENCL101133101111111RECIPIENT IDCODE/NAME PD2-2PDARM/DAF/LFMB NRR/DEBT/ADB7E4 OQC15-B-18NRCPDRCOPIEBLTTRENCL5510111011TOTALNUMBEROFCOPIEBREQUIRED:
LTTR19ENCL15  
"/i;ji'~t'Mvh0;hajj!'iiltHitII'Ijdjill,I'Itl~Illit~"tlj'li'tflt,f'gII40j'jitII"Jti".>>;'vj,>>Ml,jlTV,"1'"'~
<<t'Ihj&#xc3;X,:adl4'..
l'l'r'IUEII,v>~5'ID~tjI,"jtIIijItt,'j(t,,'ijPij:ilitlJtt't'llIIjtljj)IIItl P.O.BOX0,JUNOBEACH,FL33408.0420
~/Pl>)'6FEBRUNY22f988L-88-89U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555Gentlemen:
Re:St.LucieUnit1DocketNo.50-335Alternate ShutdownCaabilitByletterdatedJanuary7,1988(E.G.TourignytoC.0.Woody)NRCtransmitted theSupplemental SafetyEvaluation (SSE)forSt.LucieUnit1Alternate ShutdownCapability.
TheSSEsupplemented theoriginalsafetyevaluation datedJuly17,1984toaddressafireintheCableSpreadRoom.TheSSEconcluded thatexceptfortwoopenitems,theFloridaPower&LightCompanymethodology forassuringsafeshutdownforafireintheControlRoomorCableSpreadRoomconformstothecriteriadelineated inSectionsIII.G.3andIII.L.of10CFR50AppendixRandGenericLetter81-12and86-10.Asrequested bytheaboveletter,attachedpleasefindFPL'splanstoaddressthefollowing twoopenitems.TheabsencesofThotindication onthealternate shutdownpanel,and2~Thelackofananalysisofmultiplehighimpedance faults.pools8802260198 880222PDRADOCN,05000335,
'PDRanFPLGroupcompany  


U.S.NuclearRegulatoryCommissionL-88-89PagetwoBasedondiscussionswiththeNRCProjectManagerforSt.LuciePlantandtheageoftheissue,FPLfeelsitwouldbebeneficialtomeetanddiscusstheresolutionoftheopenitems.ThemeetingarrangementswillbediscussedwiththeNRCProjectManager.Shouldyouhaveanyadditionalquestions,pleasecontactus.Verytrulyyours,SeniorVicePresident-NuclearWFC/GRM/gpAttachmentcc:Dr.J.NelsonGrace,RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant ATTACHMENTST.LUCIEUNIT1ALTERNATESHUTDOWNCAPABILITYSUPPLEMENTALSAFETYEVALUATIONOPENITEMSalternateshutdownpanel.DuringtheNRC's1985specialfireprotectioninspectionreviewofalternateshutdowninstrumentation,bothI&EandNRRconfirmedtheuseofTcold.NRCletterdated4/22/85TransmittalInspectionReport85-06whichstated:"EOP2-0030144,AlternateShutdown-Instrumentationformonitoringreactorcoolanthotlegtemperaturewasnotinstalledatthehotshutdownpaneloranyotherremotestation.IENotice84-09identifiesthissystemprocessvariableasbeingrequired.ThelicenseeprovidedinformationindicatingthatthisissuewasdiscussedwithNRRandnothavingThotindicationwasacceptabletotheNRCasdocumentedinNRCmeetingminutesofMay7,1982.ThelicenseeformallysubmittedletterL-82-208datedMay17,1982whichdescribestheanalyses(seeFSARSection15.3and15.C.4)thatnaturalcirculationmaintainsacloserelationshipbetweenreactorcoolanthotandcoldlegtemperatures.SeveralnaturalcirculationcooldownsonUnit1haveverifiedtheaccuracyoftheaboveresults;thus,anoperatorcanmonitorprimarysystemconditionsfromthehotshutdownpanelusingTcold.TheinspectordiscussedtheseissueswithNRR,AuxiliarySystemsBranch,whoconfirmedthatthelicensee'sapproachissatisfactory."St.LucieUnit2SafetyEvaluationReportNUREGSupplement0843(SER)referencesFPLletterL-82-208datedMay17,1982whichrespondstotheuseofTcqldonUnit2Section9.5.1.6ofSERSupplement3identifiestheuseofTE-,1115andTE-1125whichprovideTcoldindication.Itstatesthat:"Basedontheabove,weconcludethattheinstrumentationoutsideofthecontrolroom,and,therefore,thealternativeshutdowncapability,complieswiththeguidelinesofSectionIII.LofAppendixRandistherefore,acceptable."GRM/016.ASD Basedontheabove,theinformationsubmittedtoNRRin1982forUnit2andincorporatedinthe1983submittalforUnit1wassatisfactory.Furthermore,theUnit2SERSupplement3reflectsNRCacceptance.FPL,therefore,considersthisissuetoberesolved.''mpedancefaults.Postulatingmultiplehighimpedancefaultssimultaneouslyforbranchcircuitsgoesbeyondthescopeofelectricaldistributionsystemdesign.Forthemultiplehighimpedancefaultscenariototakeplace,multiplebranchcircuitcableswouldhavetofailalongtheirlengthinsuchamannerastoresultinauniqueinsulationresistancethatwouldproducealeakagecurrenttoground,orconductortoconductor,whichwhenaddedtotheconductorloadwouldresultinacurrentjustbelowthebranchcircuitprotectivedevicerating.Thesefaultcurrentswouldthenhavetobesustainedlongenoughtocausethesupplybreakertotrip.Thus,animprobablecombinationoftemporaryleakagecurrentinmultiplecableswouldhavetooccursimultaneouslytotripthesupplybreaker.Duetothelowprobabilityoftheabovedescribedspecificfaultconditionofthecables,ananalysisofmultiplehighimpedancefaultswasnotdeemednecessary.However,FPLwilladdageneralnoteintheAlternateShutdownproceduretopermitrestorationofessentialequipmentshouldabusfeederbreakertripduetofire.Thenotewillalertplantpersonneltotripallbusloadspriortorestorationofpowertothebus,andtorestartonlynecessaryloads.GRM/016.ASD}}
U.S.NuclearRegulatory Commission L-88-89PagetwoBasedondiscussions withtheNRCProjectManagerforSt.LuciePlantandtheageoftheissue,FPLfeelsitwouldbebeneficial tomeetanddiscusstheresolution oftheopenitems.Themeetingarrangements willbediscussed withtheNRCProjectManager.Shouldyouhaveanyadditional questions, pleasecontactus.Verytrulyyours,SeniorVicePresident-Nuclear WFC/GRM/gp Attachment cc:Dr.J.NelsonGrace,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlant ATTACHMENT ST.LUCIEUNIT1ALTERNATE SHUTDOWNCAPABILITY SUPPLEMENTAL SAFETYEVALUATION OPENITEMSalternate shutdownpanel.DuringtheNRC's1985specialfireprotection inspection reviewofalternate shutdowninstrumentation, bothI&EandNRRconfirmed theuseofTcold.NRCletterdated4/22/85Transmittal Inspection Report85-06whichstated:"EOP2-0030144, Alternate Shutdown-Instrumentation formonitoring reactorcoolanthotlegtemperature wasnotinstalled atthehotshutdownpaneloranyotherremotestation.IENotice84-09identifies thissystemprocessvariableasbeingrequired.
Thelicenseeprovidedinformation indicating thatthisissuewasdiscussed withNRRandnothavingThotindication wasacceptable totheNRCasdocumented inNRCmeetingminutesofMay7,1982.Thelicenseeformallysubmitted letterL-82-208datedMay17,1982whichdescribes theanalyses(seeFSARSection15.3and15.C.4)thatnaturalcirculation maintains acloserelationship betweenreactorcoolanthotandcoldlegtemperatures.
Severalnaturalcirculation cooldowns onUnit1haveverifiedtheaccuracyoftheaboveresults;thus,anoperatorcanmonitorprimarysystemconditions fromthehotshutdownpanelusingTcold.Theinspector discussed theseissueswithNRR,Auxiliary SystemsBranch,whoconfirmed thatthelicensee's approachissatisfactory."
St.LucieUnit2SafetyEvaluation ReportNUREGSupplement 0843(SER)references FPLletterL-82-208datedMay17,1982whichrespondstotheuseofTcqldonUnit2Section9.5.1.6ofSERSupplement 3identifies theuseofTE-,1115andTE-1125whichprovideTcoldindication.
Itstatesthat:"Basedontheabove,weconcludethattheinstrumentation outsideofthecontrolroom,and,therefore, thealternative shutdowncapability, complieswiththeguidelines ofSectionIII.LofAppendixRandistherefore, acceptable."
GRM/016.ASD Basedontheabove,theinformation submitted toNRRin1982forUnit2andincorporated inthe1983submittal forUnit1wassatisfactory.
Furthermore, theUnit2SERSupplement 3reflectsNRCacceptance.
FPL,therefore, considers thisissuetoberesolved.
''mpedance faults.Postulating multiplehighimpedance faultssimultaneously forbranchcircuitsgoesbeyondthescopeofelectrical distribution systemdesign.Forthemultiplehighimpedance faultscenariototakeplace,multiplebranchcircuitcableswouldhavetofailalongtheirlengthinsuchamannerastoresultinauniqueinsulation resistance thatwouldproducealeakagecurrenttoground,orconductor toconductor, whichwhenaddedtotheconductor loadwouldresultinacurrentjustbelowthebranchcircuitprotective devicerating.Thesefaultcurrentswouldthenhavetobesustained longenoughtocausethesupplybreakertotrip.Thus,animprobable combination oftemporary leakagecurrentinmultiplecableswouldhavetooccursimultaneously totripthesupplybreaker.Duetothelowprobability oftheabovedescribed specificfaultcondition ofthecables,ananalysisofmultiplehighimpedance faultswasnotdeemednecessary.
However,FPLwilladdageneralnoteintheAlternate Shutdownprocedure topermitrestoration ofessential equipment shouldabusfeederbreakertripduetofire.Thenotewillalertplantpersonnel totripallbusloadspriortorestoration ofpowertothebus,andtorestartonlynecessary loads.GRM/016.ASD}}

Revision as of 15:46, 29 June 2018

Responds to 880107 Supplemental Safety Evaluation Re Alternate Shutdown Capability.Util Will Add General Note in Procedure to Permit Restoration of Essential Equipment Should Bus Feeder Breaker Trip Due to Fire
ML17221A641
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 02/22/1988
From: CONWAY W F
FLORIDA POWER & LIGHT CO.
To:
NRC OFFICE OF ADMINISTRATION & RESOURCES MANAGEMENT (ARM)
References
GL-81-12, GL-86-10, L-88-89, NUDOCS 8802260198
Download: ML17221A641 (7)


Text

REGULATORY INFORMATION DISTRIBUTION STEM(RIDS)VQ4ACCEEEION,PIBR:

8802260198 DOC.DATE:88/02/22NOTARIZED:

NOFACIL:50-335St.LuciePlantiUnitiiFloridaPower8cLightCo.AUTH.NAMEAUTHORAFFILIATION CONWAYeW.F.FloridaPoeer&LightCo.RECIP.NAMERECIPIENT AFFILIATION DocumentControlBranch(Document ControlDesk)

SUBJECT:

Respondsto880107supplemental safetyevaluation realternate shutdoencapability.

Utilwilladdgeneralnoteinprocedure topermitrestoration ofessential equipshouldbusfeederbreakertripduetofire.DISTRIBUTION CODE:A006DCOPIESRECEIVED:

LTRENCLSIZE:TITLE:OR/Licensing Submittal:

FireProtection NOTES:DOCKETI05000335RECIPIENT IDCODE/NAME PD2-2LATOURIQNYrEINTERNAL'CRS NRRWERMEILnJNRR/DESPSBBD1QFE01EXTERNAL'PDR NSICCOPIEBLTTRENCL101133101111111RECIPIENT IDCODE/NAME PD2-2PDARM/DAF/LFMB NRR/DEBT/ADB7E4 OQC15-B-18NRCPDRCOPIEBLTTRENCL5510111011TOTALNUMBEROFCOPIEBREQUIRED:

LTTR19ENCL15

"/i;ji'~t'Mvh0;hajj!'iiltHitII'Ijdjill,I'Itl~Illit~"tlj'li'tflt,f'gII40j'jitII"Jti".>>;'vj,>>Ml,jlTV,"1'"'~

<<t'IhjÃX,:adl4'..

l'l'r'IUEII,v>~5'ID~tjI,"jtIIijItt,'j(t,,'ijPij:ilitlJtt't'llIIjtljj)IIItl P.O.BOX0,JUNOBEACH,FL33408.0420

~/Pl>)'6FEBRUNY22f988L-88-89U.S.NuclearRegulatory Commission Attn:DocumentControlDeskWashington, D.C.20555Gentlemen:

Re:St.LucieUnit1DocketNo.50-335Alternate ShutdownCaabilitByletterdatedJanuary7,1988(E.G.TourignytoC.0.Woody)NRCtransmitted theSupplemental SafetyEvaluation (SSE)forSt.LucieUnit1Alternate ShutdownCapability.

TheSSEsupplemented theoriginalsafetyevaluation datedJuly17,1984toaddressafireintheCableSpreadRoom.TheSSEconcluded thatexceptfortwoopenitems,theFloridaPower&LightCompanymethodology forassuringsafeshutdownforafireintheControlRoomorCableSpreadRoomconformstothecriteriadelineated inSectionsIII.G.3andIII.L.of10CFR50AppendixRandGenericLetter81-12and86-10.Asrequested bytheaboveletter,attachedpleasefindFPL'splanstoaddressthefollowing twoopenitems.TheabsencesofThotindication onthealternate shutdownpanel,and2~Thelackofananalysisofmultiplehighimpedance faults.pools8802260198 880222PDRADOCN,05000335,

'PDRanFPLGroupcompany

U.S.NuclearRegulatory Commission L-88-89PagetwoBasedondiscussions withtheNRCProjectManagerforSt.LuciePlantandtheageoftheissue,FPLfeelsitwouldbebeneficial tomeetanddiscusstheresolution oftheopenitems.Themeetingarrangements willbediscussed withtheNRCProjectManager.Shouldyouhaveanyadditional questions, pleasecontactus.Verytrulyyours,SeniorVicePresident-Nuclear WFC/GRM/gp Attachment cc:Dr.J.NelsonGrace,RegionalAdministrator, RegionII,USNRCSeniorResidentInspector, USNRC,St.LuciePlant ATTACHMENT ST.LUCIEUNIT1ALTERNATE SHUTDOWNCAPABILITY SUPPLEMENTAL SAFETYEVALUATION OPENITEMSalternate shutdownpanel.DuringtheNRC's1985specialfireprotection inspection reviewofalternate shutdowninstrumentation, bothI&EandNRRconfirmed theuseofTcold.NRCletterdated4/22/85Transmittal Inspection Report85-06whichstated:"EOP2-0030144, Alternate Shutdown-Instrumentation formonitoring reactorcoolanthotlegtemperature wasnotinstalled atthehotshutdownpaneloranyotherremotestation.IENotice84-09identifies thissystemprocessvariableasbeingrequired.

Thelicenseeprovidedinformation indicating thatthisissuewasdiscussed withNRRandnothavingThotindication wasacceptable totheNRCasdocumented inNRCmeetingminutesofMay7,1982.Thelicenseeformallysubmitted letterL-82-208datedMay17,1982whichdescribes theanalyses(seeFSARSection15.3and15.C.4)thatnaturalcirculation maintains acloserelationship betweenreactorcoolanthotandcoldlegtemperatures.

Severalnaturalcirculation cooldowns onUnit1haveverifiedtheaccuracyoftheaboveresults;thus,anoperatorcanmonitorprimarysystemconditions fromthehotshutdownpanelusingTcold.Theinspector discussed theseissueswithNRR,Auxiliary SystemsBranch,whoconfirmed thatthelicensee's approachissatisfactory."

St.LucieUnit2SafetyEvaluation ReportNUREGSupplement 0843(SER)references FPLletterL-82-208datedMay17,1982whichrespondstotheuseofTcqldonUnit2Section9.5.1.6ofSERSupplement 3identifies theuseofTE-,1115andTE-1125whichprovideTcoldindication.

Itstatesthat:"Basedontheabove,weconcludethattheinstrumentation outsideofthecontrolroom,and,therefore, thealternative shutdowncapability, complieswiththeguidelines ofSectionIII.LofAppendixRandistherefore, acceptable."

GRM/016.ASD Basedontheabove,theinformation submitted toNRRin1982forUnit2andincorporated inthe1983submittal forUnit1wassatisfactory.

Furthermore, theUnit2SERSupplement 3reflectsNRCacceptance.

FPL,therefore, considers thisissuetoberesolved.

mpedance faults.Postulating multiplehighimpedance faultssimultaneously forbranchcircuitsgoesbeyondthescopeofelectrical distribution systemdesign.Forthemultiplehighimpedance faultscenariototakeplace,multiplebranchcircuitcableswouldhavetofailalongtheirlengthinsuchamannerastoresultinauniqueinsulation resistance thatwouldproducealeakagecurrenttoground,orconductor toconductor, whichwhenaddedtotheconductor loadwouldresultinacurrentjustbelowthebranchcircuitprotective devicerating.Thesefaultcurrentswouldthenhavetobesustained longenoughtocausethesupplybreakertotrip.Thus,animprobable combination oftemporary leakagecurrentinmultiplecableswouldhavetooccursimultaneously totripthesupplybreaker.Duetothelowprobability oftheabovedescribed specificfaultcondition ofthecables,ananalysisofmultiplehighimpedance faultswasnotdeemednecessary.

However,FPLwilladdageneralnoteintheAlternate Shutdownprocedure topermitrestoration ofessential equipment shouldabusfeederbreakertripduetofire.Thenotewillalertplantpersonnel totripallbusloadspriortorestoration ofpowertothebus,andtorestartonlynecessary loads.GRM/016.ASD