ML17207A808

RO 335-80-4:on 800124,feeder Breaker from Startup Transformer B to 4160-volt Vital Bus B Was Open.Caused by Improperly Labeled Breaker.Breaker Cubicles a & B Were Locked & Are Checked Daily

ML17207A808
Person / Time
Site:	Saint Lucie
Issue date:	01/25/1980
From:	WETHY C M FLORIDA POWER & LIGHT CO.
To:
References
NUDOCS 8002110517
Download: ML17207A808 (4)

Text

REGULATORY'ORMATIONDISTRIBUTIONSYS(RIDS)ACCESSIONNBR;8002110517DOC~DATE:80/01/25NOTARIZED;NOFACIL:50-335St.LuciePlantiUnitiiFloridaPower8LightCo.50-389St~LuciePlantiUnit2iFloridaPowerLLightCo.AUTH~NAMEAUTHORAFFILIATIONHETHYzC~MDFloridaPower3LightCo,RECIP,NAMERECIPIENTAFFILIATIONDOCKET¹0500033505000389

SUBJECT:

RO33580Agon800124:feederbreaker(2845)fromBstartuptransformertoB4160Vvitalbuswasopen,Causedbyimproperlylabeledbresker,BreakercubiclesA8BhavebeenlockedIIaresurvei11eddai1y~DISTRIBUTIONCODE>>M007SCOPIKSRECEIVED:LTRLENCL+SIZE>>TITLE:LER(Backfit)FC~NOTES.AINTERNAL:RECIPIENTIDCODE/NAMEEGFILE04'PARIRELANDCOPIESLTTRENCLRECIPIENTIDCODE/NAME02NRCPDRAEODNSICSHANAUERCOPIESLTTRENCLEXTERNAL:03LPDR~~~~'88OOTOTALNUMBEROFCOPIESREQUIRED:LTTR10ENCLtq

+4If'I*IlIfr4'h POSTOFFICX128,FT.PIERCE,FLORIDA33450CMW-PSLLtrBkf/837Copiesto:CtR,JHB,CAW,GMV,RRJOffsite:ADS,JRB,COW,MAS,REU,KNHITo:Mr.J.P.O'Reilly,Director,RegionIIOfficeofInspectionandEnforcementU.S.NuclearRegulatoryCommissionAtlanta,Georgia30303From:Mr.C.M.Wethy,PlantManagerStLuciePlant-DPR67FloridaPower6LightCompanyMiami,Florida:cFLORIDAPOWERBIGHTCOPIIPANYI7January25@.980~i0~~~

Subject:

hiEMOFORFACSIMILETRANSMISSIONTOCONFIRMPROMPTREPORTABLEOCCURRENCE335-80-4IMPROPERELECTRICALLINEUPThismemoistoconfirmthetelephonenotificationmadetoMr.Martinofyourofficeon1/24/80.Atabout3:00PMon1/24/80itwasnotedthatafeederbreaker(2B4-5)fromtheBStartuptransformertotheB4160Vvitalbuswasopen.Thisconditionhadexistedsince5:00PMon1/18/80andwasnotincompliancewithT.S.3.8.1.1.Actiona.regardingoffsiteA.C.powersupplieswhichrequiretestingofthe"B"DieselGenerator(D/G)every8hourswhenthe"B"Startuptransformerisoutofserviceandlimitstheoutofserviceperiodto72hours.Additionallyfor5-1/2hourson1/24/80theAD/Gwastakenoutofserviceforperiodicmaintenance.Thesur-veillancerequirementsandtimelimitsofT.S.3.8.1.1.Actionb.weremet.AlsotheBD/Gwastestedsatisfactorilyon1/18/80andagainon1/24/80soitwasoperableduringtheperiodinquestionaswasthe"A"Startuptransformer,and(exceptfortheperiodon1/24/80)"A"D/G.Thebreakerwasclosedby3:15PMon1/24/80.Theapparentcauseisanimproperlylabeledbreaker.Forinterimprotectionuntilthismatterhasbeenthoroughlyinvestigated,theAandBbreakercubicleshavebeenlockedandarebeingsurveilleddaily.(Thebreakerswerecheckedevery2hoursuntilthisactionwascompleted.)Also,noswitchingordersonthissystemwillbeperformeduntilwearesuretheproblemhasbeenthoroughlyinvestigatedandisfullyunderstood.Investigationandeval-uationwillbecontinuedandfinalresultsincludingfurthercorrectiveactionwillbereported.ethyPlntManagerSt.LuciePlantCMW:RRJ:bmh699@TI~ZQPEOPLE....SERVINGPEOPLEC' 4t4