ML17265A511
| ML17265A511 | |
| Person / Time | |
|---|---|
| Site: | Ginna  |
| Issue date: | 01/11/1999 |
| From: | MECREDY R C ROCHESTER GAS & ELECTRIC CORP. |
| To: | VISSING G S NRC (Affiliation Not Assigned), NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM) |
| References | |
| NUDOCS 9901200396 | |
| Download: ML17265A511 (14) | |
Text
~4%'i,CATEGORY1REGULAjYINFORMATION DISTRIBUTION SYSTEM(RIDS)~CCESSION NBR:9901200396 DOC.DATE:
99/01/11NOTARIZED:
NOFACIL:50-244 RobertEmmetGinnaNuclearPlant,Unit1,Rochester GAUTH.NAMEAUTHORAFFILIATION MECREDY,R.C.
Rochester GasSElectricCorp.RECIP.NAME RECIPIENT AFFILIATION VISSING,G.S.
DOCKET05000244
SUBJECT:
Requestsreliefper10CFR50.55a(a)(3)(ii)fromcertainrequirements ofSectionXXofASMEBPEVCodeforISIProgram.Reliefrequests37,38&39encl.DISTRXBUTION CODE:A047DCOPIESRECEIVED:LTR ENCLSIZE:TITLE:ORSubmittal:
Inservice/Testing/Relief fromASMECode-GL-89-04NOTES:License Expdateinaccordance with10CFR2,2.109(9/19/72)
.05000244E RECIPIENT IDCODE/NAME PD1-1LAVISSING,G.
INTERNAL:
AEOD/SPD/RAB NRR/DE/ECGB NUDOCS-ABSTRACT RES/DET/EIB EXTERNAL:
LITCOANDERSONNRCPDRCOPIESLTTRENCL1111111111111111RECIPIENT XDCODE/NAME PD1-1PDILECENTER0NRRDEMEBOGC/HDS3RES/DET/EMMEB NOACCOPIESLTTRENCL11111110111100,NOTETOALL"RIDS"RECIPIENTS:
PLEASEHELPUSTOREDUCEWASTETHTOHAVEYOURNAMEORORGANIZATION REMOVEDFROMDISTRIBUTION LISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION, CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION 415-2083TOTALNUMBEROFCOPIESREQUIRED:
LTTR14ENCL13 ANDROCHESTER GASANDElECTRICCORPORATION
~89EASTAVENUE,ROCHESTER, NYIdbf90001 AREACOOE71654'6-2700 ROBERTC.MECREDYVicePresident NucteorOperotioos Zanuary11,1999U.S.NuclearRegulatory Commission DocumentControlDeskAttn:GuyS.VissingProjectDirectorate I-1Washington, D.C.20555
Subject:
Inservice Inspection ProgramASMESectionXIRequiredExaminations forFirst10-YearIntervalforContainment (IWEandIWL)RequestsforReliefNo.37,38,39R.E.GinnaNuclearPowerPlantDocketNo.50/244
References:
EPRI"Containment Inspection ProgramGuide"GC-110698, September 1998,andselectedReliefRequests:
(1)Davis-Besse ReliefRequestE-1(2)Davis-Besse ReliefRequestE-6(3)Davis-Besse ReliefRequestE-7
DearMr.Vissing:
IntheFederalRegister, datedAugust8,1996(61FR41303),theNRCamendeditsregulations toincorporate byreference the1992EditionandAddendaofSubsections IWEandIWLofSectionXIoftheASMECode.Subsections IWEandIWLgivetherequirements forinservice inspection (ISI)ofClassMC(metallic containment) andClassCC(concrete containment).
Theserequirements arenowapplicable forR.E.GinnaNuclearPowerPlant.Thepurposeofthisletteristorequestreliefpursuantto10CFR50.55a(a)(3)(ii) fromcertainrequirements ofSectionXIoftheAmericanSocietyofMechanical Engineers (ASME)BoilerandPressureVesselCode.Rochester GasandElectricisaparticipant intheElectricPowerResearchInstitute (EPRI)projectforthepreparation ofaGenericIWE/IWLProgramandIndustryGuide.Thisprogramwasdescribed totheNRCinameetingonOctober23,1997,betweentheNRC,EPRI,andNEI,andseveralutilities.
Asaresultfromthesemeetingsaswellasthepublication oftheEPRI"Containment Inspection ProgramGuide"GC-110698, datedSeptember 1998,Rochester GasandElectricissubmitting three(3)reliefrequests.
Relief.,".3.'3b9'ttoi200396 9'staiiiPOaADOCKOSa002O48PDR
~~e~RequestsNumber37through39arebasedonthegenericreliefrequestscontained intheEPRI"Containment Inspection ProgramGuide".NRCapprovalofthesereliefrequestsisdocumented inthereferenced submittal.
MoredetailedcommentsareprovidedinAttachments 1,2and3tothisletter.ReliefRequestNumber37requestsrelieffromSectionXIoftheASMECode,1992Edition,1992Addenda,CodeItemsE5.10andE5.20,whichrequireavisualexamination ofmetalcontainment sealsandgaskets.Examination ofmostsealsandgasketsrequirethejointstobedisassembled.
Containment sealandgasketjointswillbeprovenadequatethroughtheperformance of10CFRAppendixJtesting.2.ReliefRequestNumber38requestsrelieffromSectionXIoftheASMECode,1992Edition,1992Addenda,Subarticles IWE-2420(b)andIWE-2420(c),
whichrequirerepairedareasbeexaminedduringthenextinspection period.Repairsrestorethecomponent toanacceptable condition forcontinued service.Successive examinations shouldnotberequiredforrepairedareas.3~ReliefRequestNumber39requestsrelieffromSectionXIoftheASMECode,1992Edition,1992Addenda,CodeItemE8.20,whichrequiresabolttorqueortensiontestforboltedconnections thathavenotbeendisassembled andreassembled duringtheinspection interval.
Theleaktightness ofboltedconnections willbeverifiedthroughtheperformance of10CFR50AppendixJtesting.ReliefRequests, justification, andtheproposedalternatives areincludedintheattachments tothisletter.ThesereliefrequestswillbeincludedintheInservice Inspection ProgramforR.E.GinnaNuclearPowerPlantfortheThirdIntervalProgram(whichendsDecember31,1999)andtheFourthIntervalProgram(whichbeginsJanuary1,2000).NRCapprovalofthesereliefrequestsisdesiredbeforetheendofJune,1999,toensuretheseprogramsareincompliance withNRCrequirements beforetheendoftheThirdInterval.
Vertrulyyours,RobertC.MeedAttachments
-3
~~'c:Mr.GuyS.Vissing(MailStop14B2)ProjectDirectorate I-1DivisionofReactorProjects-I/IIOfficeofNuclearReactorRegulation U.S.NuclearRegulatory Commission Washington, D.C.20555RegionalAdministrator, RegionIU.S.NuclearRegulatory Commission 475Allendale RoadKingofPrussia,PA19406U.S.NRCGinnaSeniorResidentInspector ATTACHMENT 1Rochester GasandElectricCorporation GinnaStationDocketNo.50/244First10-YearIntervalforContainment Inspection ProgramRequestforReliefNo.37Containment Inspection SealsandGasketsSystem/Component(s) forWhichReliefisRequested:
SealsandgasketsofClassMCpressureretaining components andmetalliclinersofClassCCcomponents, Examination CategoryE-D,ItemNumbersE5.10andE5.20ofIWE-2500, TableIWE-2500-1, ASMESectionXI,1992Edition,1992Addenda.Severalhundredsealsandgasketsareaffectedbythisreliefrequest.II.CodeRequirement:
IWE-2500, TableIWE-2500-1 requiressealsandgasketsonairlocks, hatches,andotherdevicestobevisuallyexamined, VT-3,onceeachintervaltoassurecontainment leak-tight integrity.
III.CodeRequirement fromWhichReliefisRequested:
Reliefisrequested fromperforming theCode-required visualexamination, VT-3,ontheaboveidentified metalcontainment sealsandgaskets.IV.BasisforRelief:10CFR50.55awasamendedintheFederalRegister(61FR41303)torequiretheuse.ofthe1992Edition,1992Addenda,ofSectionXIwhenperforming containment examinations.
Thepenetrations discussed belowcontainsealsandgaskets.Electrical Penetrations Electrical penetrations useaheaderplateattachedtoacontainment penetration nozzleflangewithredundant 0-ringsbetweentheheaderplateandflangeface.RequestforReliefNo.37Attachments Page1of10 Modulesthroughwhichelectrical conductors passareinstalled intheheaderplate.Onetype,manufactured byAmphenol, usessealsandgasketstoassureleaktightintegrity.
Asecondtype,manufactured byConax,usesasetofcompression fittings.
Replacement modulesfortheAmphenolpenetrations useacombination of0-ringsandcompression fittings.
Eachpenetration ispressurized withdrynitrogentomaintainandmonitorintegrity andtopreventtheintrusion ofmoistureintothepenetration.
Thesesealsandgasketscannotbeinspected withoutdisassembly ofthepenetration togainaccesstothesealsandgaskets.B.Containment Personnel andEquipment HatchesThePersonnel andEquipment Hatchesutilizeaninnerandouterdoorwithgasketsurfacestoensurealeaktightintegrity.
Thesehatchesalsocontainothergasketsandsealssuchasthehandwheel shaftseals,electrical penetrations, blankflanges,andequalizing pressureconnections whichrequiredisassembly togainaccesstothegasketsandseals.Sealandgasketjointsreceivea10CFR50AppendixJtest.Asnotedin10CFR50AppendixJ,thepurposeofTypeBtestsistomeasureleakageofcontainment orpenetrations whosedesignincorporates resilient seals,gaskets,sealantcompounds, andelectrical penetrations fittedwithflexiblemetalsealassemblies.
Examination ofsealsandgasketsrequirethejoints,whichareprovenadequatethroughAppendixJtesting,bedisassembled.
Forelectrical penetrations, thiswouldinvolveapre-maintenance AppendixJtest,de-termination ofcablesatelectrical penetrations ifenoughcableslackisnotavailable, disassembly ofthejoint,removalandexamination ofthesealsandgaskets,reassembly ofthejoint,re-termination ofthecablesifnecessary, postmaintenance testingofthecables,andapostmaintenance AppendixJtestofthepenetration.
TheworkrequiredfortheContainment Hatcheswouldbesimilarexceptforthede-termination, re-termination, andtestingofcables.Thisimposestheriskthatequipment couldbedamaged.The1992Edition,1993Addenda,ofSectionXIrecognizes thatdisassembly ofjointstoperformtheseexaminations isnotwarranted.
Note1inExamination CategoryE-Dwasmodifiedinthe1995,EditionofSectionXItostatethatsealorgasketconnections neednotbedisassembled solelyforperformance ofexaminations.
However,withoutdisassembly, mostofthesurfaceofthesealsandgasketswouldbeinaccessible.
RequestforReliefNo.37Attachments Page2of10 Forthosepenetrations thatareroutinely disassembled, aTypeBtestisrequireduponfinalassemblyandpriortostart-up.
SincetheTypeBtestwillassuretheleaktightintegrity ofprimarycontainment, theperformance ofthevisualexamination wouldnotprovideanincreaseinthelevelofsafetyorquality.Sealsandgasketsarenotpartofthecontainment pressureboundaryundercurrentCoderules(NE-1220(b)).Theairlocksandhatchescontaining thesematerials aretestedinaccordance with10CFR50,AppendixJ.Ifincreased leakageisidentified duringtheseAppendixJtests,thecauseofleakagewouldbeinvestigated.
Ifincreased leakagewereduetodegradation ofthesealorgasketmaterial, corrective measureswouldbeappliedandthecomponent retested.
Repairorreplacement ofsealsandgasketsisnotsubjecttoCode(1992Edition,1992Addenda)rulesinaccordance withParagraph IWA-4111(b)(5) ofASMESectionXI.Thevisualexamination ofsealsandgasketsinaccordance withIWE-2500, TableIWE-2500-1 isaburdenwithoutanycompensating increaseinthelevelofsafetyorquality.Reliefisrequested inaccordance with10CFR50.55a(a)(3)(ii).
Compliance withtheoriginalrequirements ofthissectionwouldresultinhardshiporunusualdifficulty withoutacompensating increaseinthelevelofqualityandsafety.,Testingthesealandgasketjointsinaccordance with10CFR50,AppendixJwillprovideadequateassurance oftheleak-'tight integrity ofthesealsandgaskets.V.Alternate Examinations:
Theleaktestingofsealandgasketjointswillbeinaccordance with10CFR50,AppendixJ.Noadditional alternative examinations tothevisualexamination, VT-3,ofthesealsandgasketswillbeperformed.
VI.Justification fortheGrantingofRelief:ThisReliefRequestissimilartoReliefRequestE-1submitted byDavis-Besse asoneoftheEPRI"Containment Inspection ProgramGuide"PilotPlantReliefRequests.
ThisReliefRequestwillminimizeGinnaoperating andmaintenance costwithoutdecreasing thelevelofqualityandsafety.RequestforReliefNo.37Attachments Page3of10 VII.Implementation Schedule:
Reliefisrequested forthefirstinspection intervalfortheIWEContainment Inspection Program(1996-2008).NotethatthisintervaloverlapstheThirdandFourth10-YearIntervalinspections oftheGinnaInservice Inspection Program.RequestforReliefNo.37Attachments Page4of10 ATTACHMENT 2Rochester GasandElectricCorporation GinnaStationDocketNo.50/244First10-YearIntervalforContainment Inspection ProgramRequestforReliefNo.38Containment Inspection Successive Examinations afterRepairSystem/Component(s) forWhichReliefisRequested:
AllClassMC,Paragraphs IWE-2420(b) andIWE-2420(c) successive examination requirements forcomponents foundacceptable forcontinued service.II.CodeRequirement:
Paragraphs IWE-2420(b) andIWE-2420(c) ofthe1992Edition,1992AddendaofASMESectionXIrequiresthatwhencomponent examination resultsrequireevaluation offlaws,evaluation ofareasofdegradation, orrepairsinaccordance withArticleIWE-3000, andthecomponent isfoundtobeacceptable forcontinued service,theareascontaining suchflaws,degradation, orrepairsshallbereexamined duringthenextinspection periodlistedinthescheduleoftheinspection programofParagraph IWE-2411orParagraph IWE-2412,inaccordance withTableIWE-2500-1, Examination CategoryE-C.III.CodeRequirement fromWhichReliefisRequested:
Reliefisrequested fromtherequirements ofParagraphs IWE-2420(b)andIWE-2420(c) toperformsuccessive examination ofrepairs.IV.BasisforRelief:10CFR50.55awasamendedintheFederalRegister(61FR41303)torequiretheuseofthe1992Edition,1992Addenda,ofSectionXIwhenperforming containment examinations.
Thepurposeofarepairistorestorethecomponent toanacceptable condition forcontinued serviceinaccordance withtheacceptance standards ofArticleIWE-3000.
Paragraph IWA-4150requirestheownertoconductanevaluation ofthesuitability oftherepairincluding consideration ofthecauseoffailure.RequestforReliefNo.38Attachments Page5of10 Iftherepairhasrestoredthecomponent toanacceptable condition, itisoverlyconservative torequiresuccessive examinations.
Otherparagraphs oftheASMECoderecognize thisrequirement as'overly conservative.
Iftherepairwasnotsuitable, thentherepairdoesnotmeetcoderequirements andthecomponent isnotacceptable forcontinued service.NeitherParagraph IWB-2420(b),
Paragraph IWC-2420(b),
norParagraph IWD-2420(b) requiresarepairtobesubjecttosuccessive examination requirements.
Furthermore, iftherepairareaissubjecttoaccelerated degradation, itwouldstillrequireaugmented examination inaccordance withTableIWE-2500-1, Examination CategoryE-C.Thesuccessive examination ofrepairsinaccordance withParagraphs IWE-2420(b) andIWE-2420(c) constitutes aburdenwithoutacompensating increaseinqualityorsafety.Intheirresolution topubliccommentg3.3,theNRCstated:"ThepurposeofIWE-2420(b) istomanagecomponents foundtobeacceptable forcontinued service(meaningnorepairorreplacement atthistime)asanExamination CategoryE-Ccomponent...
Ifthecomponent hadbeenrepairedorreplaced, thenthemorefrequentexamination wouldnotbe'needed."
Reliefisrequested inaccordance with10CFR50.55a(a)(3)
(ii).Compliance withtheoriginalrequirements ofthissectionwouldresultinhardshiporunusualdifficulty withoutacompensating increaseinthelevelofqualityandsafety.Therequirement toperformsuccessive examinations following repairshasbeenremovedinthe1997AddendaofASMESectionXI.ThisaddendahasbeenapprovedbytheASMEMainCommittee andhasbeenpublished.
V.Alternate Examinations:
Successive examinations inaccordance withParagraphs IWE-2420(b)andIWE-2420(c) arenotrequiredfor'epairs madeinaccordance withArticleIWA-4000.
VI.Justification fortheGrantingofRelief:ThisReliefRequestissimilartoReliefRequestE-6submitted byDavis-Besse asoneoftheEPRI"Containment Inspection ProgramGuide"PilotPlantReliefRequests.
ThisReliefRequestwillminimizeGinnaoperating andmaintenance costwithoutdecreasing thelevelofqualityandsafety.RequestforReliefNo.38Attachments Page6of10 VII.Implementation Schedule:
Reliefisrequested forthefirstinspection intervalfortheIWEContainment Inspection Program(1996-2008).NotethatthisintervaloverlapstheThirdandFourth10-YearIntervalinspections oftheGinnaInservice Inspection Program.RequestforReliefNo.38Attachments Page7of10 ATTACHMENT 3Rochester GasandElectricCorporation GinnaStationDocketNo.50/244First.10-YearIntervalforContainment Inspection ProgramRequestforReliefNo.39Containment Inspection BoltTorqueorTensionTestingI.System/Component(s) forWhichReliefisRequested:
ClassMCpressureretaining bolting.II.CodeRequirement:
ASMESectionXI,1992Editionwiththe1992Addenda,TableIWE-2500-1, Examination CategoryE-G,PressureRetaining Bolting,ItemE8.20.Bolttorqueortensiontestingisrequiredonboltedconnections thathavenotbeendisassembled andreassembled duringtheinspection interval.
III.CodeRequirement fromWhichReliefisRequested:
Reliefisrequested fromASMESectionXI1992Editionwiththe1992AddendaTableIWE-2500-1 Examination CategoryE-G,PressureRetaining Bolting,ItemE8.20.Bolttorqueortensiontestingisrequiredonboltedconnections thathavenotbeendisassembled andreassembled duringtheinspection interval.
IV.BasisforRelief:10CFR50.55a wasamendedintheFederalRegister(61FR41303)torequiretheuseofthe1992Edition,1992Addenda,ofSectionXIwhenperforming containment examinations.
Bolttorqueortensiontestingisrequiredonboltedconnections thathavenotbeendisassembled andreassembled duringtheinspection interval.
Determination ofthetorqueortensionvaluewouldrequirethattheboltingbeun-torquedandthenre-torqued orre-tensioned.
Theperformance oftheTypeBtestitselfprovesthatthebolttorqueortensionremainsadequatetoprovidealeakratethatiswithinacceptable limits.Thetorqueortensionvalueofboltingonlybecomesanissueiftheleakrateisexcessive.
Onceaboltistorquedor.tensioned, itisnotsubjecttodynamicloadingthatcouldcauseittoexperience significant change.RequestforReliefNo.39Attachments Page8of10 Verification oftorqueortensionvaluesonboltedjointsthatareprovenadequatethroughAppendixJtestingandvisualinspection isadequatetodemonstrate thatdesignfunctionismet.TorqueortensiontestingisnotrequiredonanyotherASMESectionXI,Class1,2,or3boltedconnections ortheirsupportsaspartoftheinservice inspection program.Also,allpenetrations atR.E.GinnaNuclearPowerPlantareseatedwithpressure(notunseated).
Reliefisrequested inaccordance with10CFR50.55a(a)(3)
(ii).Compliance withtheoriginalrequirements ofthissectionwouldresultinhardshiporunusualdifficulty withoutacompensating increaseinthelevelofqualityandsafety.V.Alternate Examinations:
Thefollowing examinations andtestsrequiredbySubsection IWEensurethestructural integrity andtheleak-tightness ofClassMCpressureretaining bolting,and,therefore, noadditional alternative examinations areproposed:
(1)Exposedsurfacesofboltedconnections shallbevisuallyexaminedinaccordance withrequirements ofTableIWE-2500-1, Examination CategoryE-G,PressureRetaining Bolting,ItemNo.E8.10,and(2)Boltedconnections shallmeetthepressuretestrequirements ofTableIWE-2500-1, Examination CategoryE-P,AllPressureRetaining Components, ItemE9.40,and(3)Ageneralvisualexamination oftheentirecontainment onceeachinspection periodshallbeconducted inaccordance with10CFR50.55a(b)(2)(x)(E).
VI.Justification fortheGrantingofRelief:ThisReliefRequestissimilartoReliefRequestE-7submitted byDavis-Besse asoneoftheEPRI"Containment Inspection ProgramGuide"PilotPlantReliefRequests.
ThisReliefRequestwillminimizeGinnaoperating andmaintenance costwithoutdecreasing thelevelofqualityandsafety.RequestforReliefNo.39Attachments Page9of10 VII.Implementation Schedule:
Reliefisrequested forthefirstinspection intervalfortheIWEContainment Inspection Program(1996-2008).NotethatthisintervaloverlapstheThirdandFourth10-YearIntervalinspections oftheGinnaInservice Inspection Program.RequestforReliefNo.39Attachments Page10of10