ML18037A079: Difference between revisions

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{{#Wiki_filter:ACCELERATEDDISTIUBUTIONDEMONST$QTIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)'ACCESSIONNBR:9112260334DOC.DATE:91/11/12NOTARIZED:NOFACIL:50-237DresdenNuclearPowerStation,Unit2,CommonwealthE50-249DresdenNuclearPowerStation,Unit3,CommonwealthEAUTH.NAME,AUTHORAFFILIATIONEENIGENBURG,E.CommonwealthEdisonCo.RECIP.NAMERECIPIENTAFFILIATIONDAVIS,A.B.=Region3(Post820201)
 
==SUBJECT:==
Listsresultsofsecondarycontainmentleakratetestperformedonreactorbldg.TestdemonstratedthatUnit3matlinterlockouterdoorhasadequatesealingtomaintainsecondarycontainment-integrity.DISTRIBUTIONCODE:IEOIDCOPIESRECEIVED:LTR(ENCL8SIZE:TITLE:General(50Dkt)-InspRept/NoticeofViolationResponseDOCKET0500023705000249NOTES:LicenseExpdateinaccordancewith10CFR2,2.109(12/22/72).05000237RECIPIENT1DCODE/NAMEPD3-2PDINTERNAL:ACRSAEOD/DEIIBDEDRONRRMORISSEAU,DI'I!'?ii/DLPQ/LPEB10NRR/DREP/PEPB9HNPR/PMAS/ILRB12PGFI02EXTERNAL:EGFrG/BRYCE,J.H.N&ICCOPIESLTTRECL1RECIPIENTIDCODE/NAMESIEGEL,B.AEODAEOD/DSP/TPABNRRHARBUCK~C~NRR/DLPQ/LHFBPTNRR/DOEA/OEABNRR/DST/DIRSE2NUDOCS-ABSTRACTOGC/HDS2RGN3FILE01NRCPDRCOPIESLTTRENCLNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUI!!'.".ROFCOPIESREQUIRED:LTTR24ENCL
 
Commo~althEdisonDresdenN~rPowerStationR.R.g1Morris,Illinois60450Telephone815/942-2920November12,1991EDELTR:091-700PRIPltIyyP0>eMr.A.BertDavisRegionalAdministratorDirectorateofRegulatoryOperationsRegionIIIU.S.NuclearRegulatoryCommission799RooseveltRoadGlenEllyn,Illinois60137FJlf~+
 
==Subject:==
SecondaryContainmentLeakRateTestingDresdenNuclearPowerStationCommonwealthEdisonCompanyDocketNos.50-237and50-249
 
==DearMr.DavisAspartoftheDresdenUnit3pre-outageworkaSecondaryContainmentLeakRateTest(SCLRT)wasperformedontheUnit2/3ReactorBuilding.TheSCLRTwasperformedinaccordancewithDresdenUnit3TechnicalSpecification4.7.C.l.a.,==
whichrequiresthatpriortorefueling,SecondaryContainmentintegritymustbedemonstratedbymaintaining)/=0.25inchesofwatervacuumintheReactorBuildingwithonetrainoftheStandbyGasTreatmentsystemoperatingataflowof</=4000cubicfeetperminute(CFM)undercalmwindconditions(</=5milesperhour).OnSeptember07,1991,theSCLRTwasperformedinaccordancewithDresdenTechnicalStaffSurveillance(DTS)Procedure1600-22.Theresultsofthetestarelistedbelow.'2RXBLDGTRACKWAYINNERU2RXBLDGTRACKWAYOUTERU3RXBLDGMAT'LINTER-LOCKINNERU3RXBLDGMAT'LINTER-LOCKOUTERQQQKLQMXXQHSCLRTRESULT,INCHESOFMhXEMK.CLOSEDCLOSEDOPENCLOSEDCLOSEDCLOSEDCLOSEDOPENCLOSEDCLOSEDCLOSEDCLOSED-0.273-0.191-0.268ZEDE91/447/For
'
Asshownintheabovetable,theresultwithallinterlockdoorsclosedwas0.273inchesofwaternegativepressureinsecondarycontainmentwithrespecttoatmosphere,whichsatisfiedtheTechnicalSpecification4.7.C.l.a.requirement.ThisSCLRTalsodemonstratedthattheUnit2ReactorBuildingtrackwayinterlockouterdoorhasadequatesealingtomaintainsecondarycontainmentintegrity.Additionally,thistestdemonstratedthattheUnit3materialinterlockouterdoordoesnothaveadequatesealingtomaintainsecondarycontainmentintegrity.DresdenAdministrativeProcedure(DAP)13-14,Unit3ReactorBuildingMaterialInterlockAccessControl,isapostedprocedureandprovidesadequatecontrolofthisinterlock.ThisreportisbeingsubmittedinaccordancewithSection6.6.C.3.h.oftheUnit2andUnit3TechnicalSpecifications.PleasedirectanyrequestsforfurtherinformationregardingthistopictoM.Blakemore,TechnicalStaffSystemsEngineer,atextension2421.SincerelyE.D.EenigenburgStationManagerDresdenNuclearPowerStationcc~M.StraitS.LawsonG.SmithJ.KotowskiL.GernerM.BlakemoreFile/NRCFile/NumericalZEDE91/447
 
}}

Revision as of 08:09, 20 April 2018

Lists Results of Secondary Containment Leak Rate Test Performed on Reactor Bldg.Test Demonstrated That Unit 3 Matl Interlock Outer Door Has Adequate Sealing to Maintain Secondary Containment Integrity
ML18037A079
Person / Time
Site: Dresden  Constellation icon.png
Issue date: 11/12/1991
From: EENIGENBURG E
COMMONWEALTH EDISON CO.
To: DAVIS A B
NRC OFFICE OF INSPECTION & ENFORCEMENT (IE REGION III)
References
EDE-LTR-91-700, NUDOCS 9112260334
Download: ML18037A079 (6)


Text

ACCELERATEDDISTIUBUTIONDEMONST$QTIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)'ACCESSIONNBR:9112260334DOC.DATE:91/11/12NOTARIZED:NOFACIL:50-237DresdenNuclearPowerStation,Unit2,CommonwealthE50-249DresdenNuclearPowerStation,Unit3,CommonwealthEAUTH.NAME,AUTHORAFFILIATIONEENIGENBURG,E.CommonwealthEdisonCo.RECIP.NAMERECIPIENTAFFILIATIONDAVIS,A.B.=Region3(Post820201)

SUBJECT:

Listsresultsofsecondarycontainmentleakratetestperformedonreactorbldg.TestdemonstratedthatUnit3matlinterlockouterdoorhasadequatesealingtomaintainsecondarycontainment-integrity.DISTRIBUTIONCODE:IEOIDCOPIESRECEIVED:LTR(ENCL8SIZE:TITLE:General(50Dkt)-InspRept/NoticeofViolationResponseDOCKET0500023705000249NOTES:LicenseExpdateinaccordancewith10CFR2,2.109(12/22/72).05000237RECIPIENT1DCODE/NAMEPD3-2PDINTERNAL:ACRSAEOD/DEIIBDEDRONRRMORISSEAU,DI'I!'?ii/DLPQ/LPEB10NRR/DREP/PEPB9HNPR/PMAS/ILRB12PGFI02EXTERNAL:EGFrG/BRYCE,J.H.N&ICCOPIESLTTRECL1RECIPIENTIDCODE/NAMESIEGEL,B.AEODAEOD/DSP/TPABNRRHARBUCK~C~NRR/DLPQ/LHFBPTNRR/DOEA/OEABNRR/DST/DIRSE2NUDOCS-ABSTRACTOGC/HDS2RGN3FILE01NRCPDRCOPIESLTTRENCLNOTETOALL"RIDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMPl-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUI!!'.".ROFCOPIESREQUIRED:LTTR24ENCL

Commo~althEdisonDresdenN~rPowerStationR.R.g1Morris,Illinois60450Telephone815/942-2920November12,1991EDELTR:091-700PRIPltIyyP0>eMr.A.BertDavisRegionalAdministratorDirectorateofRegulatoryOperationsRegionIIIU.S.NuclearRegulatoryCommission799RooseveltRoadGlenEllyn,Illinois60137FJlf~+

Subject:

SecondaryContainmentLeakRateTestingDresdenNuclearPowerStationCommonwealthEdisonCompanyDocketNos.50-237and50-249

DearMr.DavisAspartoftheDresdenUnit3pre-outageworkaSecondaryContainmentLeakRateTest(SCLRT)wasperformedontheUnit2/3ReactorBuilding.TheSCLRTwasperformedinaccordancewithDresdenUnit3TechnicalSpecification4.7.C.l.a.,

whichrequiresthatpriortorefueling,SecondaryContainmentintegritymustbedemonstratedbymaintaining)/=0.25inchesofwatervacuumintheReactorBuildingwithonetrainoftheStandbyGasTreatmentsystemoperatingataflowof</=4000cubicfeetperminute(CFM)undercalmwindconditions(</=5milesperhour).OnSeptember07,1991,theSCLRTwasperformedinaccordancewithDresdenTechnicalStaffSurveillance(DTS)Procedure1600-22.Theresultsofthetestarelistedbelow.'2RXBLDGTRACKWAYINNERU2RXBLDGTRACKWAYOUTERU3RXBLDGMAT'LINTER-LOCKINNERU3RXBLDGMAT'LINTER-LOCKOUTERQQQKLQMXXQHSCLRTRESULT,INCHESOFMhXEMK.CLOSEDCLOSEDOPENCLOSEDCLOSEDCLOSEDCLOSEDOPENCLOSEDCLOSEDCLOSEDCLOSED-0.273-0.191-0.268ZEDE91/447/For

'

Asshownintheabovetable,theresultwithallinterlockdoorsclosedwas0.273inchesofwaternegativepressureinsecondarycontainmentwithrespecttoatmosphere,whichsatisfiedtheTechnicalSpecification4.7.C.l.a.requirement.ThisSCLRTalsodemonstratedthattheUnit2ReactorBuildingtrackwayinterlockouterdoorhasadequatesealingtomaintainsecondarycontainmentintegrity.Additionally,thistestdemonstratedthattheUnit3materialinterlockouterdoordoesnothaveadequatesealingtomaintainsecondarycontainmentintegrity.DresdenAdministrativeProcedure(DAP)13-14,Unit3ReactorBuildingMaterialInterlockAccessControl,isapostedprocedureandprovidesadequatecontrolofthisinterlock.ThisreportisbeingsubmittedinaccordancewithSection6.6.C.3.h.oftheUnit2andUnit3TechnicalSpecifications.PleasedirectanyrequestsforfurtherinformationregardingthistopictoM.Blakemore,TechnicalStaffSystemsEngineer,atextension2421.SincerelyE.D.EenigenburgStationManagerDresdenNuclearPowerStationcc~M.StraitS.LawsonG.SmithJ.KotowskiL.GernerM.BlakemoreFile/NRCFile/NumericalZEDE91/447