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{{#Wiki_filter:FLORIDAPOWERIILIGHTCOMPANYFebruary22,1979PRN-LI-79-44Mr.JamesP.O'Reilly,Director,RegionIIOfficeofInspectionandEnforcementU.S.NuclearRegulatoryCommission101MariettaStreet,Suite3100Atlanta,Georgia30303
{{#Wiki_filter:FLORIDAPOWERIILIGHTCOMPANYFebruary22,1979PRN-LI-79-44 Mr.JamesP.O'Reilly,
: Director, RegionIIOfficeofInspection andEnforcement U.S.NuclearRegulatory Commission 101MariettaStreet,Suite3100Atlanta,Georgia30303


==DearMr.O'Reilly:==
==DearMr.O'Reilly:==
REPORTABLEOCCURRENCE335-79-1ST.LUCIEUNIT1DATEOFOCCURRENCE:JANUARY23,1979TECHNICALSPECIFICATION3.1.3.1CEDM¹43TheattachedLicenseeEventReportisbeingsubmittedinaccordancewithTechnicalSpecification6.9toprovide30-daynotificationofthesubjectoccurrence.Verytrulyyours,A.D.SchmidtVicePresidentPowerResourcesMAS/cpcAttachmentcc:Director,OfficeofInspectionandEnforcement(30)Director,OfficeofManagementInformationandProgramControl{3)HaroldF.Reis,EsquireFile933.1SLv90818o&+9Dll7PEOPI.E..SEfIVINGPEOPLE riJt)t",lie(4"W1A REPORTABLEOCCURRENCE335-79-1LICENSEEEVENTREPORTPAGETWOAdditionalEventDescritionandProbableConseuencesWhenthereactorwastrippedaspartoftheshutdownprocedure,thetwoCEA'sactedonbyCEDM843stopped.during.theirfallintothecoreatthe8inchwithdrawnposition.Attempts.to:movetheseCEA'svereunsuccessful,andtheCEA'sweredeclaredINOPERABLE.Whileinvestigatingthecause,severalattamptstomovetheCEA's,verealsounsuccessful.Followingvendorrecommendations,CEDM843motorh'ousingwasremovedandinspected.*Themotorhousinginspectionresultsindicatedthatitwasnottheca~useof.theoccurrence.WhiletheCEDMmotorhousingwasremoved,amanuallifting.@evicewasattachedtotheCEDMdriveshaft.Byapplyinganupwardforce(equaltoaprox-imately15%morethanwhattheCEDMliftingdevice,normallyapplies)andusingphysicalagitationtotheliftingdevicetheCEA'swerefreedandexercised.TheCEDMmotorhousingwasreplacedandtheCEA'sandCEDMvereoperationallytestedsatisfactorily.CEAdrop.timetestingwasperformedasrequiredbyT.S.4.1.3.4b.Also,droptimete'stingvasperformedundercoldconditions..Alldroptimeswerewellwithinlimitswithnosignificantdifferenceswhencomparedtoprevioustestresults.TheCEA,'sweredeclaredOPERABLEafterabout79hours.Thereverenoadverseconsequencesduetothisoccurrence.Throughoutthe'periodinwhichtheseCEA'swereinoperable,adequateshutdown.marginwasmaintained.Virtuallynoadditionalreactivityinthecorewaspro-.ducedduetotheseCEA'sbeing8incheswithdrawn.BoronconcentrationintheRCSwasmaintainedsufficientlyhighenoughtoprovideadequateshutdownmargineveniftheseCEA'sandthenexthighestreactivityworthdual-CEA'swerefullywithdrawnsimultaneously.Also,CEA861droppedvhileinsertingrodsduringthissamereactorshutdown.AppropriateACTIONwastaken.Nocauseforthisdropcouldbedetermined.
 
REPORTABLE OCCURRENCE 335-79-1ST.LUCIEUNIT1DATEOFOCCURRENCE:
JANUARY23,1979TECHNICAL SPECIFICATION 3.1.3.1CEDM¹43TheattachedLicenseeEventReportisbeingsubmitted inaccordance withTechnical Specification 6.9toprovide30-daynotification ofthesubjectoccurrence.
Verytrulyyours,A.D.SchmidtVicePresident PowerResources MAS/cpcAttachment cc:Director, OfficeofInspection andEnforcement (30)Director, OfficeofManagement Information andProgramControl{3)HaroldF.Reis,EsquireFile933.1SLv90818o&+9Dll7PEOPI.E..SEfIVINGPEOPLE riJt)t",lie(4"W1A REPORTABLE OCCURRENCE 335-79-1LICENSEEEVENTREPORTPAGETWOAdditional EventDescritionandProbableConseuencesWhenthereactorwastrippedaspartoftheshutdownprocedure, thetwoCEA'sactedonbyCEDM843stopped.during.theirfallintothecoreatthe8inchwithdrawn position.
Attempts.
to:movetheseCEA'svereunsuccessful, andtheCEA'sweredeclaredINOPERABLE.
Whileinvestigating thecause,severalattamptstomovetheCEA's,vere alsounsuccessful.
Following vendorrecommendations, CEDM843motorh'ousingwasremovedandinspected.*
Themotorhousinginspection resultsindicated thatitwasnottheca~useof.theoccurrence.
WhiletheCEDMmotorhousingwasremoved,amanuallifting.@evice wasattachedtotheCEDMdriveshaft.Byapplyinganupwardforce(equaltoaprox-imately15%morethanwhattheCEDMliftingdevice,normallyapplies)andusingphysicalagitation totheliftingdevicetheCEA'swerefreedandexercised.
TheCEDMmotorhousingwasreplacedandtheCEA'sandCEDMvereoperationally testedsatisfactorily.
CEAdrop.timetestingwasperformed asrequiredbyT.S.4.1.3.4b.
Also,droptimete'stingvasperformed undercoldconditions.
.Alldroptimeswerewellwithinlimitswithnosignificant differences whencomparedtoprevioustestresults.TheCEA,'sweredeclaredOPERABLEafterabout79hours.Thereverenoadverseconsequences duetothisoccurrence.
Throughout the'period inwhichtheseCEA'swereinoperable, adequateshutdown.marginwasmaintained.
Virtually noadditional reactivity inthecorewaspro-.ducedduetotheseCEA'sbeing8incheswithdrawn.
Boronconcentration intheRCSwasmaintained sufficiently highenoughtoprovideadequateshutdownmargineveniftheseCEA'sandthenexthighestreactivity worthdual-CEA's werefullywithdrawn simultaneously.
Also,CEA861droppedvhileinserting rodsduringthissamereactorshutdown.
Appropriate ACTIONwastaken.Nocauseforthisdropcouldbedetermined.
1}}
1}}

Revision as of 18:32, 29 June 2018

Forwards LER 79-001/03L-0
ML17206A669
Person / Time
Site: Saint Lucie NextEra Energy icon.png
Issue date: 02/22/1979
From: SCHMIDT A D
FLORIDA POWER & LIGHT CO.
To: OREILLY J P
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION II)
Shared Package
ML17206A670 List:
References
NUDOCS 7903130325
Download: ML17206A669 (4)


Text

FLORIDAPOWERIILIGHTCOMPANYFebruary22,1979PRN-LI-79-44 Mr.JamesP.O'Reilly,

Director, RegionIIOfficeofInspection andEnforcement U.S.NuclearRegulatory Commission 101MariettaStreet,Suite3100Atlanta,Georgia30303

DearMr.O'Reilly:

REPORTABLE OCCURRENCE 335-79-1ST.LUCIEUNIT1DATEOFOCCURRENCE:

JANUARY23,1979TECHNICAL SPECIFICATION 3.1.3.1CEDM¹43TheattachedLicenseeEventReportisbeingsubmitted inaccordance withTechnical Specification 6.9toprovide30-daynotification ofthesubjectoccurrence.

Verytrulyyours,A.D.SchmidtVicePresident PowerResources MAS/cpcAttachment cc:Director, OfficeofInspection andEnforcement (30)Director, OfficeofManagement Information andProgramControl{3)HaroldF.Reis,EsquireFile933.1SLv90818o&+9Dll7PEOPI.E..SEfIVINGPEOPLE riJt)t",lie(4"W1A REPORTABLE OCCURRENCE 335-79-1LICENSEEEVENTREPORTPAGETWOAdditional EventDescritionandProbableConseuencesWhenthereactorwastrippedaspartoftheshutdownprocedure, thetwoCEA'sactedonbyCEDM843stopped.during.theirfallintothecoreatthe8inchwithdrawn position.

Attempts.

to:movetheseCEA'svereunsuccessful, andtheCEA'sweredeclaredINOPERABLE.

Whileinvestigating thecause,severalattamptstomovetheCEA's,vere alsounsuccessful.

Following vendorrecommendations, CEDM843motorh'ousingwasremovedandinspected.*

Themotorhousinginspection resultsindicated thatitwasnottheca~useof.theoccurrence.

WhiletheCEDMmotorhousingwasremoved,amanuallifting.@evice wasattachedtotheCEDMdriveshaft.Byapplyinganupwardforce(equaltoaprox-imately15%morethanwhattheCEDMliftingdevice,normallyapplies)andusingphysicalagitation totheliftingdevicetheCEA'swerefreedandexercised.

TheCEDMmotorhousingwasreplacedandtheCEA'sandCEDMvereoperationally testedsatisfactorily.

CEAdrop.timetestingwasperformed asrequiredbyT.S.4.1.3.4b.

Also,droptimete'stingvasperformed undercoldconditions.

.Alldroptimeswerewellwithinlimitswithnosignificant differences whencomparedtoprevioustestresults.TheCEA,'sweredeclaredOPERABLEafterabout79hours.Thereverenoadverseconsequences duetothisoccurrence.

Throughout the'period inwhichtheseCEA'swereinoperable, adequateshutdown.marginwasmaintained.

Virtually noadditional reactivity inthecorewaspro-.ducedduetotheseCEA'sbeing8incheswithdrawn.

Boronconcentration intheRCSwasmaintained sufficiently highenoughtoprovideadequateshutdownmargineveniftheseCEA'sandthenexthighestreactivity worthdual-CEA's werefullywithdrawn simultaneously.

Also,CEA861droppedvhileinserting rodsduringthissamereactorshutdown.

Appropriate ACTIONwastaken.Nocauseforthisdropcouldbedetermined.

1