ML18037A084
| ML18037A084 | |
| Person / Time | |
|---|---|
| Site: | Dresden  |
| Issue date: | 02/19/1993 |
| From: | FARRAR D COMMONWEALTH EDISON CO. |
| To: | NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9302250251 | |
| Download: ML18037A084 (16) | |
See also: IR 05000237/1992028
Text
.ACCELERATED
DOCUMENTDISTRIBUTION
SYSTEMREGULATORY
INFORMATION
DISTRIBUTION
SYSTEM(RIDS)CESSIONNBR:9302250251
DOC.DATE:
93/02/19NOTARIZED:
NODOCKET¹CIL:50-237
DresdenNuclearPowerStation,Unit2,Commonwealth
E0500023750-24/Dresden.NuclearPowerStation,Unit3,Commonwealth
E05000249AUTH.NAMEAUTHORAFFILIATION
FARRAR,DE
Commonwealth
EdisonCo.RECIP.NAME
RECIPIENT
AFFILIATION
DocumentControlBranch(Document
ControlDesk)SUBJECT:RespondstoNRCltrreviolations
notedininsprept50-237/92-28
650-249/92-28.Corrective
actions:Unit
2LPCIfusechangedouton930219.W/930219
ltr.'IDISTRIBUTION
CODE:IE01DCOPIESRECEIVED:LTR
ENCLSIZE:TITLE:General(50Dkt)-Insp
Rept/Notice
ofViolation
ResponseNOTES:License
Expdateinaccordance
with10CFR2,2.109(12/22/72).
05000237RECIPIENT
IDCODE/NAME
PD3-2PDINTERNAL:
ACRSAEOD/DEIB
AEOD/TTCNRRMORISSEAUiD
NRR/DOEA/OEAB
NRR/DRIL/RPEB10
NRR/PMAS/ILPB
2NUDOCS-ABSTRACT
OGC/HDS2RGN3FILE01EXTERNAL:
EG&G/BRYCEgJ.H.
INSICCOPIESLTTRENCL11221111111111111111111111RECIPIENT
IDCODE/NAME
STANGiJAEODAEOD/DSP/TPAB
DEDRONRR/DLPQ/LHFBPT
NRR/DREP/PEPB9H
NRR/PMAS/ILPB
1NRR/PMAS/ILRB12
OED:E~LE02NRCPDRCOPIESLTTRENCL1111111111111111111111NOTETOALL"RIDS"RECIPIENTS:
PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.504-2065)
TOELIMINATE
YOURNAMEFROMDISTRIBUTION
LISTSFORDOCUMENTS
YOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:
LTTR25ENCL25
eCommonwealth
Edison1400OpusPlaceDownersGrove,illinois60515February19,1993U.S.NuclearRegulatory
Commission
D.C.20555Attention:
DocumentControlDeskSubject:DresdenNuclearPowerStationUnits2and3ResponsetoNoticeofViolation
Inspection
Report50-237/92028;
50-249/92028
NRCDocketNumbers50-237and50-249Reference:
T.O.MartinlettertoL.O.Delseorge,
datedJanuary20,1993,transmitting
Inspection
Report50-237/92028;
50-249/92028
EnclosedisCommonwealth
EdisonCompany's
(CECo)responsetotheNoticeofViolation
(NOV)whichwastransmitted
withthereferenced
letter.TheNOVcitedtwoSeverityLevelIVviolations
requiring
awrittenresponse.
Theresponsetotheseviolations
isprovidedintheattachment.
Ifyourstaffhasanyquestions
orcommentsconcerning
thisletter,pleasereferthemtoDeniseSaccomando,
Compliance
Engineerat(708)663-7285.
Sincerely,
cZ~A~D.FarrarNuclearRegulatory
ServicesManagerAttachment
cc:A.B.Davis,RegionalAdministrator
-RegionIIIJ.Stand,ProjectManager-NRRM.N.Leach,SeniorResidentInspector
-Dresden9302250251
930219PDRADOCK05000237QPDRZNLD/2112/13
ATIACHMENTRESPONSETONOTICEOFVlOLATION
NRCINSPECTlON
REPORT50-237/92028,
50-249/92028
.Viln:2792021.22210CFR50,AppendixB,Criterion
V,requiresthatactivities
affecting
qualityshallbeprescribed
bydocumentinstructions,
procedures,
ordrawings,
ofatypeappropriate
tothecircumstances
andshallbeaccomplished
inaccordance
withtheseinstructions,
procedures,
ordrawings.
Procedure
DOP6900-07,Revision9,"125VdcGroundDetections",
requiredthattheprocedure
beimmediately
performed
atDCsystemgroundsabove60Vdc,andaB1WorkRequestbesubmitted
oncethegroundwaslocated.Furthermore,
theprocedure
required,
atgroundsabove115Vdc,initiation
ofa14daytimeclock(administrative
LimitingCondition
forOperation
(LCO))tolocateandremovethegroundandpreparation
ofaJustification
forContinued
Operation
(JCO)ifthegroundcouldnotbelocatedorisolatedwithin14days.Procedure
DAP07-05,Revision9,"Operating
LogsandRecords",
Paragraph
B.5,requiredthatwhenaLCOentryoccurs,theeventmustbeloggedintheLCOLog.Contrarytotheabove:1.OnSeptember
26,1992,whena125VdcsystemgroundwaspresentinUnit3,theLicenseefailedtoinitiateactionstolocateandremovetheground.Inaddition,
theLicenseefailedtoinitiateanadministrative
LCOanddocumenttheeventintheLCOLog.2.OnNovember3,1992,when125VdcgroundswerepresentinbothUnits2and3,anadministrative
LCOwasinitiated
andloggedintheLCOLogforUnit3only.TheLicenseecouldnotprovideevidencethatactionsweretakentoidentifyandremovethegroundsineitherunit.3.OnNovember12,1992,whena125VdcgroundwaspresentinUnit3,thelicenseefailedtoinitiateactionstolocateandremovetheground.ZNLD/2112/14
ATIACHMENTRESPONSETONOTICEOFVIOLATION
NRCINSPECTION
REPORT50-237/92028,
50-249/92028
.REAONFVILATION:DresdenStationconcurswithitem1oftheviolation
aswritten.DresdenStationprocedures
provideclearguidanceonrequiredactionsuponidentification
ofdcgrounds.Itisclearthatpersonnel
failedtomeetmanagement's
expectations.
Investigation
oftheeventsindicated
thatpersonnel
failedtofollowestablished
stationprocedures.
Withtheissuanceoftheviolation
DresdenStationinitiated
aninvestigation
whichrevealedthatstationdidtakeappropriate
actionsonNovember3andNovember12thInregardtotheNovember3,1992,groundinvolving
Unit3(example2),actionwastakentoidentifyandremovetheground.TheUnit3Logentrystatesthatagroundcheckwasperformed
at1857hoursfora-155Vgroundonthe125Vdcsystem.Thegroundwasidentified
onbus3A-2circuitnumber16andWorkRequestD-13836waswrittenforinvestigation
andrepairofthecircuit.Electrical
Maintenance
identified
andreplacedabrokenterminalblock.Furthertestingrevealedthattheauxiliary
transformer
31fireprotection
circuitwasgrounded.
WorkRequest15077waswrittentoimplement
repairs.lnregardtotheNovember3,1992,groundinvolving
Unit2(example2),actionwastakentoidentifyandremovetheground.WorkRequestD-13806waswrittenforinvestigation
oftheground;however,thegroundclearedbeforeElectrical
Maintenance
personnel
couldbeginwork.TheUnit2groundwasnotdocumented
intheLCOLogsinceitneverreachedtherequired115volts,asspecified
inDOP6900-06,'125VdcGroundDetection".
InregardtotheNovember12,1992,groundinvolvinq
Unit3(example3),actionwastakentolocateandremovetheground.TheUnitOperatorloggedthe-115Vground,thegroundchecking,
andtheLCOintheUnitLogBook.Thegroundwaslocatedonbus3A-2.NoworkrequestwaswrittensinceWorkRequestsD-13836andD-15077werealreadyopentoinvestigate
thegroundonbus3A-2.OnNovember16,1992,WorkRequestD-14129waswrittentodocumenta-90VgroundontheUnit3125Vdcsystem.Electrical
Maintenance
personnel
investigated
andresolvedthegroundunderworkrequestsD-13836andD-15077.Thegroundwasmonitored
untilJanuary2,1993,andneverreturned.
RRECNANDIVEDForexample1,theidentified
groundhasclearedwithoutanyactionbystationpersonnel.
Operations
personnel
involvedintheSeptember
26,1992,eventwerecounseled
byOperations's
seniormanagement
withregardstotheimportance
ofprocedure
adherence.
ZNLD/2112/15
ATTACHMENT
RESPONSETONOTICEOFVIOLATION
NRCINSPECTION
REPORT50-237/92028,
50-249/92028
.QQQQEVETEDRTHEVNTheOperations
Managerhasdiscussed
failuretofollowestablished
procedures
withtheShiftEngineers.
Beginning
onFebruary10,1993,theShiftEngineers
tailgated
withtheirrespective
crewstheimportance
offollowing
procedures.
Theywereremindedthatadherence
toprocedures
isabasicexpectation
andisrequiredtoensuresafe,reliableoperations.
DATEFLLMPLIANEFullcompliance
wasachievedwhentheindividual
wascounseled.
ZNLO/2112/16
ATIACHMENTRESPONSETONOTICEOFVIOLATION
NRCINSPECT(ON
REPORT50-237/92028,
50-249/92028,
TION:242210CFR50,AppendixB,Criterion
XVI,requiresthatmeasuresshallbeestablished
toassurethatconditions
adversetoquality,suchasfailures,
malfunctions,
deficiencies,
deviations,
defective
materialandequipment,
andnonconformance
arepromptlyidentified
andcorrected.
Contrarytotheabove,inFebruaryandApril1992,thelicenseeidentified
oversized
fusesinvarioussafetyrelatedcircuitsincluding
theEmergency
DieselGenerator
excitersandLowPressureCoolantcircuitry.
AsofDecember,
1992,thiscondition
adversetoqualityhadnotbeencorrected.
REASNFRTHEVITINThefuseverification
programidentified
fusesthatwereinadequately
sized.Thesediscrepancies
werenotedonTechnical
ProblemReports(TPRs)andforwarded
toCorporate
Engineering
forresolution.
TheEngineering
evaluation
ofthefuseintheUnit2LowPressureCoolantInjection
(LPCI)circuitry
statesthat,"thecurrently
installed
20Afuse,BussmannTypeMIN,inPanel902-32,providesadequateprotection
forthecircuit,"
andthatthe"existing
installed
20Afuseprotectsthecircuit."
Theevaluation
alsoindicated
thatthefusemaynotcoordinate
withtheupstream30Acircuitbreaker.Nosafetysignificance
oroperability
concernswereattributed
tothispotential
lackoffusecoordination.
Engineering
did,however,recommend
replacement
ofthefuse.Whentheevaluation
arrivedatDresden,thefusecoordinator
prioritized
replacement
oftheLPCIfusecommensurate
withitslackofsafetysignificance
andoperability
concerns.
Nospecificduedatewasassignedforthefusereplacement.
Engineering's
operability
assessment
ofthefusesintheUnit2dieselgenerator
excitation
cabinetsrecommended
nocompensatory
actionstoensureoperability
(i.e.thesystemisoperablewiththecurrently
installed
fuses).Two30Afusesandone40Afusewereinstalled
intheUnit2excitation
cabinet,insteadofthe25Afusespresented
inthesystemdrawing.Theevaluation
againincludedarecommendation
toreplacethesubjectfuses.Itstatedthatduringanabnormalfaultcondition,
thefusesmaynotprotecttheprimarywindingsofcontroltransformers.
Therecommendation
wasbasedonguidancefromGEBulletinGET-30396,
"HowtoSelectanApplyPowerFuses,TypesEJ-1andEJ0-1."AnActionDueDateforfusereplacement
ofFebruary28,1993,wasassignedbyEngineering.
Thereasoning
behindtheassignedduedatewasbasedupontheengineering
judgmentthatanyexpectedfaultcondition
thata25Afusecouldprotectagainstwouldalsobeprotected
bya30Aor40Afuse.ZNLD/2112/17
ATTACHMENT
RESPONSETONOTICEOFVIOLATION
NRCINSPECTION
REPORT50-237/92028,
50-249/92028
Sinceidentification
ofthedieselfusediscrepancy
inApril,1992,DresdenStationhastakennumerousactionstoaddressEngineering's
fusereplacement
recommendation.
Mostsignificant
oftheseactionswasamoredetailedengineering
calculation
thatsupported
continued
operation
withthecurrently
installed
dieselgenerator
fuses.Thiscalculation
statesthat"GE25A,30A,and40Afuses,TypeEJ0-1,willclearthefaultbeforeanydamageisdonetotheprimarywindtngsofthetransformer
orthecircuit."
Thisevaluation
confirmed
Engineering's
previousoperability
assessment
andtheengineering
judgmentofthefusecoordinator.
DresdenStationbelievesthattheLPCIfuseswerenotreplacedpriortotheinspection
periodbecausenosafetyoroperability
concernexistswiththecurrently
installed
fuse.Forthedieselgenerator
fuses,numerousactionsweretakentoreplaceandprocurethefusesandfuseclipspriortotheassignedActionDueDateofFebruary28,1993.Dresdendoesacknowledge,
however,thatEngineering's
recommendations
shouldhavebeendispositioned
inamoretimelymanner.Dresdenidentified
theneedforadditional
administrative
controlsforfusesidentified
forreplacement
underthefuseupgradeprogram,Examination
ofthecurrentDresdenAdministrative
Procedure
(DAP)11-27,"ControlandMaintenance
ofFusesandtheFuseList,"indicated
thatitdidnotprovidedirection
fordispositioning
ofTPRsissuedpriortoOctober,1992.CRRETIVETEPTELTDTheUnit2LPCIfusewaschangedoutonFebruary19,1993.TheUnit3LPCIsystemhasalsobeeninspected.
TheUnit3LPCIfusehasthecorrectamperage,
butisaMIN-typefuseratherthantherecommended
KTN-typefuse.Whilenooperability
concernshavebeenraised,DresdenwillstillreplacetheUnit3LPCIfusethenexttimeLPCIisout-of-service.
Forgoodengineering
practice,
theone40Adieselgenerator
fuseonUnit2willbereplacedwitha30AfusebyApril30,1993.ADocumentChangeRequestwassubmitted
onFebruary19,1993toupdatetheamperageonallrelateddrawingsto30amps.Toaugmentadministrative
controlsuntilDAP11-27isrevised,theModification
Implementation
Sup'ervisor
hasissuedamemorandum
tothefusecoordinator
incorporating
direction
forfusereplacements
identified
inTechnical
ProblemReportsissuedpriortoOctober,1992.ZNLD/2112/18
ATlACHMENTRESPONSETONOTICEOFVIOLATION
NRCINSPECTION
REPORT50-237/92028,
50-249/92028
.RRECTIVETEPENTAVIDERVILATION:DAP11-27,willberevisedbyMarch31,1993,toincorporate
theinterimdirections
described
intheabovememorandum.
DATEOFFULLMPFullcompliance
wasachievedwiththeissuanceamemorandum
tothefusecoordinator
incorporating
direction
forfusereplacements
identified
inTechnical
ProblemReportsissuedpriortoOctober,1992.ZNLD/2112/19