ML17261B092: Difference between revisions

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==DearMr.Johnson:==
==DearMr.Johnson:==
InresponsetotheNRC'sJuly9,1990requestforadditionalinformation,RG&Eisprovidingthefollowingresponsesinanexpeditiousmanner.RG&Edoesnotbelievethatgroundwaterisenteringtheannularaccessareaaroundcontainmentfrombeneathcontainment,assuspectedbyNRCinspectors,butfrombehindthesheetpilingthatformtheretainingwallintheeasternlyquadrantoftheintermediatebuildingsub-basement.Becausethisareaisclassifiedasaconfinedspace,andiscontaminated,theeffortnecessarytoconfirmthisinformationisdifficult.Nonetheless,thismajoreffortisunderway.PreliminaryresultsareexpectedbyJuly16,withdetailedresultsexpectedbyJuly20.RG&Ealsodoesnotexpectthatanydegradationofcontainmentstructuralmembersisoccurringatthistime.WehavemetallnecessarysurveillancetestingrequirementsneededtoconformtotheGinnaTechnicalSpecifications,includingmanyIntegratedLeakRateTests(ILRT)andtendonsurveillancetests(reviewedinSEPTopicIII-7.A).Resultsfromthe1989ILRTwereexcellentandthejust-completedtendontestingconfirmedthatalllift-offtestsmetacceptancecriteria,andallinspectedtendonwireswerein"as-new"condition.RG&Ewillreviewtheoriginalstructuraldesignrequirementsofthecontainmentandassesstheimpactoftherecentlydeterminedgroundwaterlevelonthedesign.Forstructuraldetailswhichareinaccessibleduetolocation(highradiationareaintheRHRroom,orencasedinrockorconcrete)absolutelydefinitiveconclusionsmaynotbepossible.However,5'00718030390'0711,PDRADOCK05000244QPDCourbestengineeringjudgmentwillbeusedtoprovidereasonable)04~g5~
InresponsetotheNRC'sJuly9,1990requestforadditionalinformation,RG&Eisprovidingthefollowingresponsesinanexpeditiousmanner.RG&Edoesnotbelievethatgroundwaterisenteringtheannularaccessareaaroundcontainmentfrombeneathcontainment,assuspectedbyNRCinspectors,butfrombehindthesheetpilingthatformtheretainingwallintheeasternlyquadrantoftheintermediatebuildingsub-basement.Becausethisareaisclassifiedasaconfinedspace,andiscontaminated,theeffortnecessarytoconfirmthisinformationisdifficult.Nonetheless,thismajoreffortisunderway.PreliminaryresultsareexpectedbyJuly16,withdetailedresultsexpectedbyJuly20.RG&Ealsodoesnotexpectthatanydegradationofcontainmentstructuralmembersisoccurringatthistime.WehavemetallnecessarysurveillancetestingrequirementsneededtoconformtotheGinnaTechnicalSpecifications,includingmanyIntegratedLeakRateTests(ILRT)andtendonsurveillancetests(reviewedinSEPTopicIII-7.A).Resultsfromthe1989ILRTwereexcellentandthejust-completedtendontestingconfirmedthatalllift-offtestsmetacceptancecriteria,andallinspectedtendonwireswerein"as-new"condition.RG&Ewillreviewtheoriginalstructuraldesignrequirementsofthecontainmentandassesstheimpactoftherecentlydeterminedgroundwaterlevelonthedesign.Forstructuraldetailswhichareinaccessibleduetolocation(highradiationareaintheRHRroom,orencasedinrockorconcrete)absolutelydefinitiveconclusionsmaynotbepossible.However,5'00718030390'0711,PDRADOCK05000244QPDCourbestengineeringjudgmentwillbeusedtoprovidereasonable)04~g5~
11J~'Iir assurancethattheproperstructuralfunctionscanbemet.Thisapproachisconsistentwithother,typesofsurveillancetests(e.g.MOVATS,testinginresponsetoGenericLetter89-10)whereaduplicationofpost-accidentfunctionscannotbeachieved,butgoodjudgmentisusedtoextrapolatetheabilitytomeetsafetyfunctionsbasedoncurrentavailabletestingmethodologies.Anyreasonablyavailableinformation,whetherNRCorindustrygenerated,willbeusedtohelpusperformsuchcorrelations.BecauseoftheuniquenatureoftheGinnacontainmentdesign,asdiscussedinourJuly,9telecon,RG&Eproposesthat.theNRCtechnicalreviewersandRG&Epersonneldiscussourfindingsandconclusionsatamutuallyacceptabletime,suchastheendoftheweekofJuly23,attheRG&Eoffices.Verytrulyyours,RobertC.MecredyDivisionManagerNuclearProductionGJW/112Attachmentxc:Mr.AllenR.Johnson(MailStop14D1)ProjectDirectorateI-3Washington,D.C.'0555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector  
11J~'Iir assurancethattheproperstructuralfunctionscanbemet.Thisapproachisconsistentwithother,typesofsurveillancetests(e.g.MOVATS,testinginresponsetoGenericLetter89-10)whereaduplicationofpost-accidentfunctionscannotbeachieved,butgoodjudgmentisusedtoextrapolatetheabilitytomeetsafetyfunctionsbasedoncurrentavailabletestingmethodologies.Anyreasonablyavailableinformation,whetherNRCorindustrygenerated,willbeusedtohelpusperformsuchcorrelations.BecauseoftheuniquenatureoftheGinnacontainmentdesign,asdiscussedinourJuly,9telecon,RG&Eproposesthat.theNRCtechnicalreviewersandRG&Epersonneldiscussourfindingsandconclusionsatamutuallyacceptabletime,suchastheendoftheweekofJuly23,attheRG&Eoffices.Verytrulyyours,RobertC.MecredyDivisionManagerNuclearProductionGJW/112Attachmentxc:Mr.AllenR.Johnson(MailStop14D1)ProjectDirectorateI-3Washington,D.C.'0555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector}}
}}

Revision as of 13:52, 18 May 2018

Responds to 900709 Request for Addl Info Re Containment Integrity Insp.Util Will Provide Preliminary Results by 900716 Re Where Groundwater Entering Annular Access Area. Meeting Proposed for Wk of 900723
ML17261B092
Person / Time
Site: Ginna Constellation icon.png
Issue date: 07/11/1990
From: MECREDY R C
ROCHESTER GAS & ELECTRIC CORP.
To: JOHNSON A R
NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM), Office of Nuclear Reactor Regulation
References
TASK-03-07.A, TASK-3-7.A, TASK-RR TAC-67427, NUDOCS 9007180303
Download: ML17261B092 (4)


Text

ACCELERATEDDISTRIBUTIONDEMONSTRATIONSYSTEMREGULATORYINFORMATIONDISTRIBUTIONSYSTEM(RIDS)ACCESSIONNBR:9007180303DOC.DATE:90/07/11NOTARIZED:NOFACIL:50-244RobertEmmetGinnaNuclearPlant,Unit1,RochesterAUTH.NAMEAUTHORAFFILIATIONMECREDY,R.C.RochesterGas6ElectricCorp.RECIP.NAMERECIPIENTAFFILIATIONJOHNSON,A.R.ProjectDirectorateI-3

SUBJECT:

Respondsto900709requestforaddiinforecontainmentintegrityinsp.DISTRIBUTIONCODE:AOOIDCOPIESRECEIVED:LTR2ENCL0SIZE:TITLE:ORSubmittal:GeneralDistributionDOCKETG05000244tDNOTES:LicenseExpdateinaccordancewith10CFR2,2.109(9/19/72).05000244/RECIPIENTIDCODE/NAMEPD1-3LAJOHNSON,AINTERNAL:NRR/DET/ECMB9HNRR/DST8E2NRR/DST/SICB7ENUDOCS-ABSTRACTOGC/HDS2RES/DSIR/EIBEXTERNAL:LPDRNSICCOPIESLTTRENCLRECIPIENTIDCODE/NAMEPD1-3PDNRR/DOEA/OTSB11NRR/DST/SELB8DNRR/DST/SRXB8E-8@MEGFILE01NRCPDRCOPIESLTTRENCLDDDNOTETOALL"RIDS"RECIPIENTS:DDPLEASEHELPUSTOREDUCEWASTE!CONTACTTHEDOCUMENTCONTROLDESK,ROOMP1-37(EXT.20079)TOELIMINATEYOURNAMEFROMDISTRIBUTIONLISTSFORDOCUMENTSYOUDON'TNEED!TOTALNUMBEROFCOPIESREQUIRED:LTTR21ENCL eill/////I///I//I//////I////1/I////////ROCHESTERGASwf~ai~owiieI'iRORYANDELECTRICCORPORATIONo89EASTAVENUE,ROCHESTER,N.K14649.0001-July11,1990TCtfPHONEARKAcooKvie.546-2700U.S.NuclearRegulatoryCommissionDocumentControlDeskAttn:AllenR.JohnsonProjectDirectorateI-3Washington,D.C.20555

Subject:

ContainmentIntegrityInspectionR.E.GinnaNuclearPowerPlantDocketNo.50-244

Reference:

July9,1990NRCRequestforAdditionalInformation,(TACNo.67427),i

DearMr.Johnson:

InresponsetotheNRC'sJuly9,1990requestforadditionalinformation,RG&Eisprovidingthefollowingresponsesinanexpeditiousmanner.RG&Edoesnotbelievethatgroundwaterisenteringtheannularaccessareaaroundcontainmentfrombeneathcontainment,assuspectedbyNRCinspectors,butfrombehindthesheetpilingthatformtheretainingwallintheeasternlyquadrantoftheintermediatebuildingsub-basement.Becausethisareaisclassifiedasaconfinedspace,andiscontaminated,theeffortnecessarytoconfirmthisinformationisdifficult.Nonetheless,thismajoreffortisunderway.PreliminaryresultsareexpectedbyJuly16,withdetailedresultsexpectedbyJuly20.RG&Ealsodoesnotexpectthatanydegradationofcontainmentstructuralmembersisoccurringatthistime.WehavemetallnecessarysurveillancetestingrequirementsneededtoconformtotheGinnaTechnicalSpecifications,includingmanyIntegratedLeakRateTests(ILRT)andtendonsurveillancetests(reviewedinSEPTopicIII-7.A).Resultsfromthe1989ILRTwereexcellentandthejust-completedtendontestingconfirmedthatalllift-offtestsmetacceptancecriteria,andallinspectedtendonwireswerein"as-new"condition.RG&Ewillreviewtheoriginalstructuraldesignrequirementsofthecontainmentandassesstheimpactoftherecentlydeterminedgroundwaterlevelonthedesign.Forstructuraldetailswhichareinaccessibleduetolocation(highradiationareaintheRHRroom,orencasedinrockorconcrete)absolutelydefinitiveconclusionsmaynotbepossible.However,5'00718030390'0711,PDRADOCK05000244QPDCourbestengineeringjudgmentwillbeusedtoprovidereasonable)04~g5~

11J~'Iir assurancethattheproperstructuralfunctionscanbemet.Thisapproachisconsistentwithother,typesofsurveillancetests(e.g.MOVATS,testinginresponsetoGenericLetter89-10)whereaduplicationofpost-accidentfunctionscannotbeachieved,butgoodjudgmentisusedtoextrapolatetheabilitytomeetsafetyfunctionsbasedoncurrentavailabletestingmethodologies.Anyreasonablyavailableinformation,whetherNRCorindustrygenerated,willbeusedtohelpusperformsuchcorrelations.BecauseoftheuniquenatureoftheGinnacontainmentdesign,asdiscussedinourJuly,9telecon,RG&Eproposesthat.theNRCtechnicalreviewersandRG&Epersonneldiscussourfindingsandconclusionsatamutuallyacceptabletime,suchastheendoftheweekofJuly23,attheRG&Eoffices.Verytrulyyours,RobertC.MecredyDivisionManagerNuclearProductionGJW/112Attachmentxc:Mr.AllenR.Johnson(MailStop14D1)ProjectDirectorateI-3Washington,D.C.'0555U.S.NuclearRegulatoryCommissionRegionI475AllendaleRoadKingofPrussia,PA19406GinnaSeniorResidentInspector