ML17207A818

Forwards Response to NRC 791001 & 17 Requests for Info Re Loss of Offsite Power Events.Description of Significant sys-wide Improvements & Info Re Major Offsite Events Encl

ML17207A818
Person / Time
Site:	Saint Lucie, Turkey Point
Issue date:	02/11/1980
From:	UHRIG R E FLORIDA POWER & LIGHT CO.
To:	EISENHUT D G Office of Nuclear Reactor Regulation
Shared Package
ML17207A819	List: 05000250/LER-1978-017, Forwards LER 78-017/03L-0 05000250/LER-1978-017-03, /03L-0:on 780514,improper Switching at Pratt & Whitney Substation & Incorrect Wiring of Protective Relays at Midway Substation Led to de-energization.Offsite Power Lost.Incorrect Wiring Corrected L-78-226, Forwards Response to NRC 780607 Request for Proposed Methods & Procedures to Implement NRC Positions Re Sys Operations. Util to DOE Encl ML17207A818 ML17339A562 ML17339A563 ML17339A565 ML17339A569 ML17339A570 ML17339A571 ML17339A575 ML17339A577 ML17339A580
References
L-49-80, NUDOCS 8002150465
Download: ML17207A818 (3)

Text

ACCESSIONwBH:FACIL:5025050-251bv-335AUTllNATEUHRIlJgk~E~kFCIP~AAilEEISE~nur,O,G.aEuuLATyI"iFOkiiA1IONurSTerSUTIOlSTE~CRrOS)d002150a65OOC,OATF.:FJO/02/11"(UTAHIlgwu:filJTurKeyPointPlantiUnit3<FloridaPowerandLjqhtCTurkeyPointPlant<minit4~Flori@aPo~erandLiattCSt,Lur.iePlantiUnit1IFlorio~Power4LightGo.AUTHORAFF1LIAT1<fi<FIoriaaPower>C~D~wEGIPlE"TAFFILI~1iliesOfficeof"uclearreactorRegulationOQCKi=T05000250n251

SUBJECT:

ForwarfsresoonsetoI'G7910nl41017re(>uestsforinforelossofoffs>teoozier.,events.Descriptionofsi.>nif>cantsys<<wivei~orove~entshinfore+gloro.ffs~teeventsencl.(w~<o45'u&~~/~Rrx~/~wDISTRIBvlIO~couE:Au155GOPIBSktGEIvsO:LTk~F<<GL~Slit..TITl.E:OnsiteEmergencyVowerSystemsREGIVIEtrI0GOOE/'cA4EAGTION:05BC~P~~C)Ft~~~INTERNAL0-~FTL13c16~iP418I~CSYS~R21REACSFTYBR23AOVREACdR25CHIRASSAI827HGOONAIOr0AEOOSTSGROUPLEAOi<COPIESLTIRE'~GL11121111111111111111RF.GIPIEf4TIOCUOE/WA~E""CRIB+toz<W%i~'f15OELO17AUXIL5Y5~3k20F!iGHbk22PLANTSYSBk20P'v'HSYSUR26TONOIp050EEUSrtABAUERGoprt,sLlTRElCL1011111111111111111EXTERNAL:03LPOR31ACRS11161604BASIC11"~880)g@PS'VTOTALi~UMHE,HUFCOPIESREVUI,REO;ITTk~e,i~>CL OfficeofNuclearReactorRegulationAttention:Mr.DarrellG.Eisenhut,ActingDirectorDivisionofOperatingReactorsU.S.NuclearRegulatoryCommissionWashington,D.C.20555

DearMr.Eisenhut:

February11,.1980L-49-80Re:TurkeyPointandSt.LuciePlantsDocketNos.50-250,50-251,and50-335OffsitePowerThisletterisforwardedinresponsetolettersdatedOctober1andOctober17,1979fromMr.A.SchwencerandMr.R.W.Reidofyourstaff.TheNRCletterswereonthegeneralsubjectofoffsitepowerandrequestedconsiderableinformationspecifictolossofoffsitepowereventsexperiencedbyFloridaPowertLightCompany(FPL).Thedetailedcompilationoftherequestedinformationrepresentsanextensiveefforttosegregatedataonoffsitepowerevents,muchofwhichalreadyexistsinotherFPLreports.Atthispoint,wehavedeterminedthatitwouldbelesstimeconsuming(animportantconsiderationgiventhemanpowerconstraintscausedbyNUREG-0578)andpossiblymoreusefulforustodescribethemanysignificantsystem-wideimprovementswehavemadesinceourfirstnuclearunitbecameoperationalin1972.ThisdescriptionisprovidedinAttachment1andshowsthedegreeofchangeexperiencedbytheFPLtransmissionsystemovertheinterveningyears.Thus,forthepurposeofevaluatinganelectricaltransmissionsystem,thevalueofcompilingdetailedinformationonoffsitepowereventsfromseveralyearspastwouldappeartobemuchlessfortheFPLsystemthanforasystemthathadnotbeenchanged.AlistingofmajorFPLoffsitepowereventsispresentedinAttachment2.Eacheventwasanalyzedtodetermineitscauseandtodeveloprecommendationstohelppreventrecurrence.Alargenumberofsuchreccmmendationshavebeenimplemented,withaconsequentincreaseinthestabilityandreliabilityoftheFPLsystem.Ingeneraltheimprovementscanbecategorizedasfollows:(1)anincreaseinthenumberandcapacityoftransmissionlines,withplansforfurtherexpansionofthe500kVportionofthesystem,,(2)improvedcontrolbymeansofanadvancedelectroniccontrolsystem,simulatortraining,andimprovedswitchingproceduresandemergencycontrolprocedures,(3)improvedsystemrelayprotection,ando~(4)revisedsystemoperatingpolicies.~3 Hr.OarrellG.Eisenhut,ActingDirectorPage2Inanattempttosupplyasmuchinformationaspossiblewhileminimizingourstaffworkload,wehavecompiledalistofreferencesrelatedtotheeventslistedinAttachment2.ThereferencesarepresentedinAttachment3.Wehopethattheattachedinformationwillsatisfyyourstaff'srequest.However,ifadditionalinformationisneededtoresolveanyremainingconcerns,pleaseletmeknow.FPLismorethanwillingtorespondtoyourstaff'sconcerns,butwewouldliketodosoinamannerthatminimizestheimpactonourlimitedresources.Verytrulyyours,/~-iRobertE.UhrigVicePresidentAdvancedSystems5(TechnologyREU/tSS/cphAttachments(3)cc:'1r.J.P.O'Reilly,RegionIIHaroldReis,Esquire