ML17229B085

Requests Approval of Encl Relief Request 25 Which Proposes to Use Alternative Requirements of ASME Code Case N-613 in Lieu of Requirements of ASME Section Xi Figures IWB-2500-7(a) & IWB-2500-7(b).Action Requested by Aug 1999

ML17229B085
Person / Time
Site:	Saint Lucie
Issue date:	04/05/1999
From:	STALL J A FLORIDA POWER & LIGHT CO.
To:	NRC OFFICE OF INFORMATION RESOURCES MANAGEMENT (IRM)
References
L-99-78, NUDOCS 9904140227
Download: ML17229B085 (8)

Text

CATEGORYj.REGULAYINFORMATIONDISTRIBUTISYSTEM(RIDS)<~ACCESSIONNBR:9904140227DOC.DATE:99/04/05NOTARIZED:NOFACIL:50-389St.LuciePlant,Unit2,FloridaPowerRLightCo.AUTH.NAMEAUTHORAFFIL1ATIONSTALL,J.A.FloridaPower&LightCo.RECIP.NAMERECIPIENTAFFILIATIONRecordsManagementBranch(DocumentControlDesk)DOCKET05000389

SUBJECT:

Requestsapprovalofenclreliefrequest25whichproposestousealternativerequirementsofASMECodeCaseN-613inlieuofrequirementsofASME'ectionXIFiguresIWB-2500-7(a)&IWB-2500-7(b).ActionrequestedbyAug1999.DTSTRTBUTTONCODE:A047DCORTESRECETVED:LTRjENCLISTRE:TITLE:ORSubmittal:Inservice/Testing/RelieffromASMECode-GL-89-04NOTES:ATERECIPIENTIDCODE/NAMEPD2-3LAGLEAVES,WINTERNAL:ACRSNRR/DE/EMEBOGC/HDS3RES/DET/EMMEBEXTERNAL:LITCOANDERSONNRCPDRCOPIESLTTRENCL111111111011111'1RECIPIENTIDCODE/NAMEPD2-3PDZLCE~RENNE01OCS-ABSTRACTRES/DET/EIBNOACCOPIESLTTRENCL11l1;11'1111DNNOTETOALL"RZDS"RECIPIENTS:PLEASEHELPUSTOREDUCEWASTE.TOHAVEYOURNAMEORORGANIZATIONREMOVEDFROMDISTRIBUTIONLISTSORREDUCETHENUMBEROFCOPIESRECEIVEDBYYOUORYOURORGANIZATION,CONTACTTHEDOCUMENTCONTROLDESK(DCD)ONEXTENSION415-2083TOTALNUMBEROFCOPIESREQUIRED:LTTR13ENCL12 FloridaPower&LightCompany,6351S.OceanDrive,JensenBeach,FL34951,JI-"IRKApril5,1999L-99-7810CFR50.410CFR50.55aU.S.NuclearRegulatoryCommissionAttn:DocumentControlDeskWashington,DC20555St.LucieUnit2DocketNo.50-389In-Service-InspectionPlanSecondTen-YearInterval~RRi5R25Pursuantto10CFR50.55a(a)(3),'loridaPowerandLightCompany(FPL)requestsapprovaloftheenclosedReliefRequest25.ReliefRequest25proposestousethealternativerequirementsofASMECodeCaseN-613inlieuoftherequirementsofASMESectionXIFiguresIWB-2500-7(a)andIWB-2500-7(b).Inaddition,thereliefrequestproposestousethisCodeCaseinlieuoftherequirementsofASMESectionV,Article4fortheperformanceoftherequiredvolumetricexaminationsasspecifiedinTableIWB-2500-1CategoryB-Dofthe1989EditionofASMESectionXI.FPLhasdeterminedpursuantto10CFR50.55a(a)(3)thattheproposedalternativeswouldprovideanacceptablelevelofqualityandsafety,andthatcompliancewiththespecifiedrequirementswouldresultinhardshiporunusualdifficultywithoutacompensatingincreaseinthelevelofqualityandsafety.NRCactionisrequestedtobecompletebyAugust1999tosupportplanningforthespring2000Unit2refuelingoutage(SL2-12).Pleasecontactusifthereareanyquestionsaboutthissubmittal.Verytrulyyours,J.A.StallVicePresidentSt.LuciePlantEnclosureJAS/GRMcc:RegionalAdministrator,RegionII,USNRCSeniorResidentInspector,USNRC,St.LuciePlant'P904140227990405PDRADQCK0500038'PQ5',PDRanFPLGroupcompany tSt.LucieUnit2DocketNo.50-389L-99-78EnclosurePage1St.LucieUnit2SECONDINSPECTIONINTERVALRELIEFREQUESTNUMBER25A.COMPONENTIDENTIFICATION'lass:1ReactorPressureVesselPressure-retainingNozzle-to-VesselweldsexaminedatSt.LucieUnit2.B.EXAMINATIONREQUIREMENT:RulesforInserviceInspectionofNuclearPowerPlantComponents,SectionXI,1989Edition,ExaminationCategoryB-DFullPenetrationWeldsofNozzlesinVessels.CodeItemB3.90,FigureIWB-2500-7(a)8(b).ASMESectionV,1989Edition,Article4,Paragraphs;T-441.3.2.5AngleBeamScanning,T-3.2.6ScanningforReflectorsOrientedParalleltotheWeld,andT-441.3.2.7ScanningforReflectorsOrientedTransversetotheWeld.C.RELIEFREQUESTED:Pursuantto10CFR50.55a(a)(3)0i,FPLrequeststousethealternativerequirementsofCodeCaseN-613inlieuoftherequirementsofASMESectionXIFiguresIWB-2500-7(a)andIWB-2500-7(b).WealsorequesttousethisCodeCaseinlieuoftherequirementsofASMESectionV,Article4fortheperformanceoftherequiredvolumetricexaminationsasspecifiedinTableIWB-2500-1CategoryB-Dofthe1989EditionofASMESectionXI.Theseexaminationswillbeperformedduringthesecondinspectioninterval.D.BASISFORRELIEF'PLiscurrentlyrequiredtoperformInserviceExaminationsofselectedweldsinaccordancewiththerequirementsof10CFR50.55a,planttechnicalspecifications,andthe1989EditionoftheAmericanSocietyofMechanicalEngineersBoilerandPressureVesselCode,SectionXI,RulesforInseiviceInspectionofNuclearPowerPlantComponents.ThisCodeeditioninvokestheexaminationvolumerequirementsofFiguresIWB-2500-7(a)andIWB-2500-7(b).ThisCodeeditionalsoinvokestheexaminationrequirementsofAppendixI,ArticleI-2000whichreferencesASMESectionV,Article4thatessentiallyprescribestwenty(20)yearoldexaminationmethodology.TheexaminationvolumefortheReactorvesselNozzle-to-vesselweidsextendsfarbeyondthewelditself,andisunnecessarilylarge.Thisextendsthetimeforexaminationsignificantly,andresultsinnonetincreaseinsafety,astheareabeingexaminedissimplyabasemetalregionwhichisnotpronetoin-servicecrackingandhasbeenextensivelyexaminedbeforethevesselwasputintoserviceandduringthefirstin-serviceexamination..ThisCodeCasealsode-emphasizestherequirementtodetectflawsperpendiculartotheweld-basemetalinterfaceonthegroundsthattheyneveroccurasaresultoftheweldingprocess.Furthermore,thelikelihoodofinservicecrackingwiththisorientationintheseregionsisveryIow,havingneverbeenobserved.

tSt.LucieUnit2DocketNo.50-389L-99-78EnclosurePage2St.LucieUnit2SECONDINSPECTIONINTERVALRELIEFREQUESTNUMBER25E.TheimplementationofCodeCaseN-613isalsoexpectedtoreduceon-vesselexaminationtimebyasmuchas12hours,whichtranslatestosignificantcostsavingsandreducedpersonnelradiationexposure.ALTERNATIVEEXAMINATIONS')PerformexaminationsinaccordancewithCodeCaseN-6132)ConductMechanizedUltrasonicExaminationsof100%ofallweldstotheextentpracticalusingPerformanceDemonstrationInitiative(PDI)ASMESectionXI,AppendixVillqualifiedproceduresandpersonnel.ThiswillbeaccomplishedinaccordancewithCodeCaseN-622(reliefrequestNo.22).3)PeriodicSystemPressureTestsperCategoryB-P,TableIWB-2500-1F.IMPLEMENTATIONSCHEDULE:SecondInserviceInspectionIntervalG.ATTACHMENTSTOTHERELIEF:CodeCaseN-613 CASEN-6'13~~CASESOFASMEBOILERANDPRESSUREVESSELCODEApprovalDate:July30,1998SeeNumericindexforexpirationandanyreaffirmationdates.CaseN-613UltrasonicExaminationofFullPenetrationNozzlesinVessels,ExaminationCategoryB-D,ItemNo's.B3.10andB3.90,ReactorVessel-To-NozzleWelds,Fig.IWB-2500-7(a),(b),and(c)SectionXI,Division1Inquiry:Whatalternativestotheexaminationre-quirementsofSectionXI,AppendixIandSectionV,Article4arepermissiblewhenperformingultrasonicexaminationofreactorvessel-to-nozzlewelds?Reply:ItistheopinionoftheCommitteethatultra-sonicexaminationofCategoryB-Dnozzlesmaybeconductedusingtechniquesdesignedfordetectionandsizingofsurfaceandsubsurfacetlawswithintheex-aminationvolume(A-B-C-D-E-F-G-H),orientedinaplanenormaltothevesselinsidesurfaceandparalleltotheweldforFigs,Iand2,andorientedinaplanenormaltothenozzle.insidesurfaceandparalleltotheweldforFig.3.1051SUPP.2-NC CASE(continued)N-613~~CASESOFASMEBOILERANDPRESSUREVESSELCODEtl+rt,tzanozzlewallthicknessrs~shell(orhead)thicknessr/nozzleinsidecornerradius0rs/2IIII1/2in.IIpXHIfs/2miix.CDII41/2in.IIIIIGFEts////(IIIIIIIIIIIIf/ir/-'/2in.aIII/////M//rnz~'xam.vol.A-B-C-D-E-F-G-HCladdingwherepresentMrCornerflawEXAMINATIONREGION(Note(1)IShell(orhead)adjoiningregionAttachmentweldregionNozzlecylinderregionNozzleinsidecornerregionEXAMINATIONVOLUME(Note(2)lC-D-E-FB-C-F-GA-B-G-HM-N PNOTES:(1)ExaminationregionsareidentifiedforthepurposeofdifferentiatingtheacceptancestandardsinIWB.3512.(2)Examinationvolumesmaybedeterminedeitherbydirectmeasurementsonthecomponentorbymeasurementsbasedondesigndrawings.FIG.1NOZZLEINSHELLORHEAD(ExantlnationZonesinBarrelTypeNozzlesJoinedbyFullPenetrationCornerWe(ds)SUPP.2-NC1052 I~~CASE(continued)N-6't3CASESOFASMEBOILERANDPRESSUREVESSELCODE4t,!2~nozzlewallthicknessts~shell{orhead)thicknessr~/mnozzleinsidecornerradiusABCD////III\r,IIIIIIIIIr/1r/-1/2in.p8III/////IIIcIM//1/2inCladding/2in'herepresentExam.vol.A-B-C-D-E-F-G-HMCornerflawEXAMINATIONREGION{Note{1))Shell{orhead)adjoiningregionAttachmentweldregionNozzlecylinderregionNozzleinsidecornerregionEXAMINATIONVOLUME{Note{2))C-D-E-FB-C-F-GA G-HM-N PNOTES:{1)ExaminationregionsareidentifiedforthepurposeofdifferentiatingtheacceptancestandardsinIWB-3512.{2)Examinationvolumesmaybedeterminedeitherbydirectmeasurementsonthecomponentorbymeasurementsbasedondesigndrawings.FIG.2NOZZLEINSHELLORHEAD(ExantinationZonesinFlangeTypeNozzlesJoinedbyFullPenetrationButtWelds)1053SUPP.2-NC CASE(continued)CASESOFASMEBOILERANDPRESSUREVESSELCODEIIIIIIIIIIIIIIIIIIr%Irt~nozzlewallthicknesstsashelliorhead)thicknessr/~nozzleinsidecornerradius'/2ina+8CD/2Ill.////III\IIiIiIIIIir/i//IIr-/zin.I//p/e//I/Exam.vol.A C-D-E-F-G-HCladdingwherepresentMrCornerflawEXAMINATIONREGIONNotel1)ShellIorhead)adjoiningregionAttachmentweldregionNozzlecylinderregionNozzleinsidecornerregionEXAMINATIONVOLUMENote(2))C-D-E-F-G8-C-GA G-HM-N PNOTES:I1)ExaminationregionsareidentifiedforthepurposeofdifferentiatingtheacceptancestandardsinIW8-3512.I2)Examinationvolumesmaybedeterminedeitherbydirectmeasurementsonthecomponentorbymeasurementsbasedondesigndrawings.FIG.3NOZZLEINSHELLORHEAD(ExaminationZonesinSet-OnTypeNozzlesJoinedbyFullPenetrationCornerWelds)SUPP.2-NC1054