ML091330236
| ML091330236 | |
| Person / Time | |
|---|---|
| Site: | North Anna  |
| Issue date: | 05/12/2009 |
| From: | Hartz L Dominion, Virginia Electric & Power Co (VEPCO) |
| To: | Document Control Desk, Office of Nuclear Reactor Regulation |
| References | |
| 08-595D | |
| Download: ML091330236 (8) | |
Text
10 CFR 50.55a VIRGINIA ELECTRIC AND POWER COMPANY RICHMOND, VIRGINIA 23261May12,2009 u.s.NuclearRegulatoryCommissionAttention:DocumentControlDeskWashington,D.C.20555SerialNo.NL&OS/ETSDocketNo.LicenseNo.
08-595D RO 50-338 NPF-4 VIRGINIA ELECTRICANDPOWER COMPANY (DOMINION)
NORTH ANNA POWER STATIONUNIT1 RESPONSETONRC COMMENTSONTHE FOURTH INTERVAL lSI PROGRAMInlettersdatedOctober17,2008(SerialNo.08-0595)andFebruary18,2009(SerialNo,09-595B),DominionsubmittedtheNorthAnnaPowerStationUnit1InserviceInspection(lSI)ProgramforthefourthlSIintervalapplicabletoClass1,2,and3components,componentsupports,andarevisiontoReliefRequestCS-001.Includedwiththeprogramwererequestsforalternativesorrelieffromspecificcoderequirementsin accordance with10CFR50.55a(a)(3)(i)and/or(ii)or10CFR50.55a(g)(5)(iii).InanApril30,2009phonecallwithDominion,theNRCstaffcommentedonthelSIprogramsubmittal.InresponsetothoseNRCstaffcomments,revisedlSIprogrampagesareincludedinthe attachment tothisletter.Pleasereplacetheoriginalpageswiththeattachedpages.Ifyouhaveanyquestionsorrequireadditionalinformation,pleasecontactMr.ThomasShaubat(804)273-2763.
Sincerely,LeslieHartzVicePresident-NuclearSupportServices Attachments:1ResponseCommentsontheFourthIntervallSIProgramandCS-0012.RevisedPagesCommitmentsmadeinthisletter:None cc:U.S.NuclearRegulatoryCommissionRegionIISamNunn AtlantaFederalCenter 61ForsythStreet,SWSuite23T85 Atlanta, Georgia 30303Mr.J.E.Reasor,Jr.OldDominionElectricCooperative Innsbrook Corporate Center4201DominionBlvd.Suite300GlenAllen,Virginia23060 NRC SeniorResidentInspectorNorthAnnaPowerStationMs.D.N.WrightNRCProject ManagerU.S.NuclearRegulatoryCommissionOneWhiteFlintNorthMaiIStop 0-8 H4A11555RockvillePikeRockville,Maryland20852Mr.J.F.Stang,Jr.NRCProject ManagerU.S.NuclearRegulatoryCommissionOneWhiteFlintNorthMaiIStop 0-8 G9A11555RockvillePikeRockville,Maryland20852SerialNo.08-5950DocketNo.50-338ResponsetoNRC CommentsonlSIProgramPage2of2 SerialNo.08-5950DocketNo.50-338 ATTACHMENT 1 FOURTH INTERVAL lSI PLAN RESPONSE TO COMMENTSONTHE FOURTH INTERVAL lSI PROGRAM VIRGINIA ELECTRICANDPOWER COMPANY NORTHANNAPOWER STATIONUNIT1 SerialNo.08-5950DocketNo.50-338ResponsetoNRCCommentsonlSIProgram FOURTH INTERVAL lSI PLAN RESPONSE TO REQUEST FOR INFORMATION FOR FOURTH INTERVAL lSI PROGRAMANDRELIEF REQUEST CS-001 NRC CommentsTheNRCstaffhasthefollowingcommentsrelatedtoNorthAnnaUnit1lSIFourthyearIntervalProgramsubmittalandReliefRequestCS-001,Revision1:1.TheoriginallSIfourth10-yearintervalprogramsubmittaldatedOctober7,2008,Abstract,Pageii,ThirdparagraphstatesthatIWP(inservicetestingofpumps)andIWV(InserviceTestingofValves)ProgramareseparateprogramsandarenotincludedaspartoflSIProgram.PleasenotethattheArticlesIWPandIWVarenotpartoftheapplicableASMESectionXI,2004Edition.2.TheoriginallSIfourth10-yearprogramsubmittaldatedOctober7,2008,Abstract,Pageviii,TablestatesthatReliefRequestCS-001-SurveillanceofsnubberswillbeinaccordancewithTRMandpreservicetestinginaccordancewithISTD.PleasenotethatISTDisnotpartofASMESectionXI,northeReliefRequestCS-001,Revision1datedFebruary18,2009.ISTDneedstobedeletedfromthelSI program.3.RevisedReliefRequestCS-001,Revision1,Page,2of8,VisualExamination,thirdparagraph,fourthlinestatesthathistorically,thenumberofunacceptablevisualsnubberinspectionsatNAPSUnit1isoneorlessandbasedonthesnubberpopulation,thecurrentinspectionintervalis48months(everyotherrefuelingoutage).Pleasenotethat48monthsarenotaguarantee,itdependsuponfuturevisualexamination.
Dominion ResponseNRCComments1and2RevisedlSIProgrampagesareattachedtoaddressthespecificNRCcomments.NRCComment3Thephrase"thecurrentinspectionintervalis48months(everyotherrefuelingoutage)"wasincludedtoidentifythecurrentinspectionintervalforUnit1.Dominionagreesthatifadditionalfailuresareidentifiedduringfutureinspectionstheinspectionfrequencywillchangeaccordingly.Arevisedpageisattachedwiththephraseremovedtoavoid confusion.
Page1of1 SerialNo.08-5950DocketNo.50-338 ATTACHMENT 2 FOURTH INTERVAL lSI PLAN RESPONSE TO COMMENTSONTHE FOURTH INTERVAL lSI PROGRAM CORRECTED PAGES VIRGINIA ELECTRICANDPOWER COMPANY NORTH ANNA POWER STATION UNIT 1 ABSTRACT VIRGINIA ELECTRIC AND POWER COMPANY (DOMINION)
NORTH ANNA POWER STATIONUNIT1 INSERVICE INSPECTION PLAN FOURTH INSPECTION INTERVALMAY1,2009 THROUGHAPRIL30,2019 AsrequiredbytheCodeofFederal Regulations,Title10,Part50,Section50.55a(10CFR50.55a),theNAPS1InserviceInspection(ISnProgramshouldhavebeenupdatedtothe2001EditionofASMESectionXIwithaddendathroughthe2003Addenda..ThiswasthelatesteditionandaddendaofSectionXIincorporatedinto10CFR50.55aasofApril30,2008.
However,asallowedby10CFR 50.55a(g)(4)(iv),thefourthinserviceinspectionplanwaspreparedtothe requirementsofthe2004EditionofASMESectionXI.
This updated programisfortheNAPS1 fourthtenyear inspection interval scheduled to commence May1,2009 and be completedApril30,2019.
These dates reflect extension ofthefirst intervalby201 days documented in our lettertotheNRC dated 8/25/88, Serial No.88-486, and extension of the second intervalby127 days approvedperNRC Letter No.98-167, dated 3/6/98.In cases where the requirements of Section XI have been determinedtobe impractical, requests for relief have been developed per10CPR 50.55a(g)(5).
Alternatives, as allowedby10 CFR 50.55a(a)(3), to specific requirements of ASME SectionXIor10CPR 50.55a, that provide an acceptable level of quality and safety and provide a methodology more conducivetothe performance of an examinations have been proposed.Similarly, alternatives have been proposed when compliance with specified requirements would result in hardship or unusual difficulty without a compensation increaseinthelevel of qualityandsafety.
This document provides an overview and summary of the NAPS-1 lSI Program for Subsections IWA, IWB, IWC,IWDandIWF.The boundaries of the lSI Program, component classifications,andthe employment of exemptions in IWB-1220, IWC-1220, IWD-1220, and IWF-1230 are shownonthe lSI Classification Boundary Drawings (CBMs).The graphic codes, symbols and text usedonthe CBMs are detailed on 11715-CBM-L&S-4, Legends and Symbols Drawing.The Inservice Inspection Schedule for Components and Component Supportsandthe Inservice Inspection Plan for System Pressure Tests are provided in separate volumestothe lSI Program.System Pressure Tests are performed in accordance with the System Pressure Test Implementing Schedule.The lWE (RequirementsforClassMCandCC Components) and IWL (RequirementsforClassCC Concrete Components)
Programs are separateandarenot included as part of the lSI Program.Steam generator inspections will continuetobe performed under Plant Technical SpecificationsNAPSVII4-ISIPlan 11 Revision QA North Anna Power Station Unit 1, Interval 4 lSI Correspondence (Continued)
Component Support Relief Requests CS-OO1-Surveillance ofsnubberswillbein accordance PendingwithTechnical RequirementsManualand preservicetestinginaccordancewithASMEOMPart4.
Miscellaneous Documents (ReservedforLaterUse.)
Partial Coverage Relief Requests (ReservedforLaterUse.)
Risk Informed Application (ReservedforLaterUse.)
NAPS VII4-ISIPlan viii Revision 0 Thereare326smallboresnubbersand12largeboresnubbers(greaterthan50KIPS)installedinNorthAnnaUnit1.AllthesnubbersatNAPSUnit1arehydraulicsnubbers.SnubbermaintenanceandrepairarecontrolledatNAPSbywrittenmaintenanceproceduresthatarebasedonmanufacturers'recommendationsandindustrygoodpractices.TheseproceduralrequirementsaresimilartotherequirementsofOMPart4,paragraph1.5.6.'Changingsnubbermaintenanceproceduresrequiresreviewandapprovalofthesnubberengineer.Designengineeringapprovalisrequiredforanychangesthatcouldaffectthesnubbersabilitytomeetthefunctional(operability)testacceptancecriteriaoraffectthesnubbersabilitytosupportthedesignload.Followingmaintenanceandrepair,snubbersarerequiredtobefunctionallytestedtodemonstratethattheymeettheacceptancecriteria.Snubbersthataremodifiedorreplacedduetovisualorfunctionaltesting deficiencies aresubjecttotherequirementsofIWA-4000andmustbeevaluatedforsuitabilityasrequiredbyOMPart4,paragraph1.5.7.Replacementsnubbersarefunctionallytestedpriortoinstallationandvisuallyinspectedfollowinginstallationinaccordancewiththesnubbervisualinspectioncriteria.VISUALINSPECTIONSForvisualinspections,theTRMstatesthatsnubbersarecategorizedasaccessibleorinaccessibleduringreactoroperationandmaybeexaminedindependently.ThisisthesamerequirementasOMPart4,paragraph1.6.TheTRMdoesnotaddresssnubberpreserviceexaminations.However,snubbersarerotatedfromserviceinaccordancewithCodeCaseN-508-3(approvedbyReg.Guide1.147)andfollowingreplacementavisualexaminationisrequiredtobeperformedinaccordancewithmaintenanceproceduresandthepostmaintenancetestingprogram.Thisvisualexaminationissimilartothepreserviceexaminationrequirements describedinOMPart4,paragraph2.1.1.AdditionalpreserviceoperabilitytestingproposedbyVirginiaElectricandPowerCompany(Dominion)isdescribedlaterinthissection.Repair/ReplacementsactivitieswillbeperformedasrequiredbyCodeCaseN-508-3andIWA-4000.Replacementsnubbersarefunctionallytestedpriortoinstallationtodemonstratethattheymeetengineeringacceptancecriteria.TheintervalsforsnubbervisualinspectionsareconductedinaccordancewiththeTRMvisualexaminationtablewhichmeetsGenericLetter90-09.Theinspectionintervalisbasedonthesnubberpopulationandthenumberofunacceptablesnubbers.Historically,thenumberofunacceptablevisualsnubbersinspectionsatNAPSUnit1isoneorless.TheOMPart4,paragraph2.3.2.2basestheinspectionfrequencyonthenumberofunacceptablesnubbersbutdoesnottakeintoconsiderationthesnubberPage2of8