ML17059B562

Rev 1 to Ssflaw Overlay Size.

ML17059B562
Person / Time
Site:	Nine Mile Point
Issue date:	05/16/1997
From:	TRENCH R MPR ASSOCIATES, INC.
To:
Shared Package
ML17059B563	List: ML17059B562 ML17059B568 ML18040A261
References
085-295-02, 085-295-02-R01, 85-295-2, 85-295-2-R1, S14-33M009, S14-33M9, NUDOCS 9705280089
Download: ML17059B562 (28)

Text

CALC$JgPp~gOILIMPRP.eu.of<~c4,oPlgMPRAssociates, inc.320KingStreetAlexandria, VA22314CALCULATION TITLEPAGEClientProjectTitleNiagaraMohawkPowerCorporation NMP-1RWCUWeld33-FW-22OverlayDesignSSFLAWOverlaySizePage1of8+r4~u~avmTaskNo.085-9708-295-0 Calculation No.085-295-02 Preparer/Date Checker/Date Reviewer/Date Rev.No.s./hachpg~~r~~c~~~s(ra/pp5//c/'5'Ps/c/ggf~Quf~(r.(q7QUALITYASSURANCE DOCUMENThisdocumenthasbeenprepared, checked,andreviewedinaccordance withtheQualityAssurance requirements of10CFR50AppendixB,asspecified intheMPRQualityAssurance Manual.9705280089 970519PDRADQCK05000220PPDR H'll c-A~gt4-EgHoolilMPRMPRAssociates, Inc.320NngStreetAlexandria, VA22314of(+RECORDOFREVISIONS Calcuiation No.085-2952RevisionPreparedByci~Description CheckedByPage2InitialIssueChangedtitleofAttachment

1.

gV tiiMXuCalculation No.085-295-02 PreparedByp~~4oP/gMPRAssociates, Inc.320KingStreetAlexandria, VA22314Page3CONTENTSSection1.02.0PURPOSESUMMARYOFRESULTS.~Pae3.0APPROACH4.0CALCULATION

5.0 OVERLAYLENGTHCALCULATION

6.0ATI'ACHMENTS 1SSFLAWProgramOutput2Examination ReportforWeld33-FW-22dated5/15/97 I

CAu5'll-3HOoRkm~Or~~MXRMPRAssociates, Inc.320KingStreetAlexandria, VA22314>oglgCalculation No.085-295-02 PreparedByPage41.0PURPOSEThepurposeofthiscalculation istodetermine thethickness ofanoverlaytobeinstalled atthelocationofWeld33-FW-22intheNMP-1RWCUpipingsystem.2.0SUMMARYTheoverlaysizeis:Thickness:

Length:0.25-inch minimum25-inchminimum,centeredonthenozzlesideedgeoftheweldcrown3.0APPROACHIn1988NMPCobtainedcomputerprogramSSFLAW,whichcalculates overlaysizesusingthemethodpresented inReference 1.Reference 2describes theprogram,itsdevelopment, anduse,andprovidesausermanualfortheprogram.Theprogramperformsthefollowing operations:

SSFLAWassumesthecrackextends360degreesaroundthepipeandpenetrates fullythroughtheoriginalpipewalLThecrackisassumedtostopattheoverlay.

st~=A41(

lXLMPRA.eMPRAssociates, Inc.320KingStreetAlexandria, VA22314Calculation No.085-295-02 PreparedByCheckedByPage5SSFLAWthenusesthestressesappliedtothesectiontodetermine theoverlaythickness neededtopreventplasticcollapseofthesection,including afactorofsafetyof2.77asrequiredbyNUREG-0313, Revision2.4.0CALCULATION 4.1PromSSFLAWInutsAppendixAtotheSSFLAWuser'smanual(Reference 2)describes theinputsrequiredtoruntheprogram.Therequiredinputsforoverlaysizingarelistedbelow,alongwiththevaluestobeusedinthepI'ograIn.

,e'eitIntnindnh.SSFLAWdefaultvalues fortheseparameters areused.Theprogramcalculates theseparameters forType304materialattheinputtemperature ofthesystem(discussed below).0eratinTemerature.PerReference 3,thedesignnozzletemperature is575'F.Pressure.

PerReference 3,thedesignpressureofthenozzleis1300psig.PieOutsideDiameterandWallThickness.

PerReference 3,theweldisinnominal6-inchpiping(6.625-inch actualOD)with0.38-inch minimumwallthickness.

~+~<I4-9Hoa~/LIMPRMPRAssociates, Inc.320KingStreetAlexandria, VA22314Calculation No.085-295-02 PreparedByPage6AliedStresses.

Stressesarecalculated inReference 4asfollows:AppliedTensileStress;AppliedBendingStress:0.4ksi12.0ksiNotethattheabovestressesincludesecondary stressesduetothermalexpansion.

TreatingthermalstressesasprimarystressesisrequiredbyNUREG-0313, Revision2foroverlaysfabricated fromSMAWweldmetal.PertheSSFLAWusermanual,pressurestressiscalculated separately bytheprogramandsoisnottobeincludedintheinputstresses.

Notethatthefollowing parameters arespeciQedforinputintoProgramSSFLAWbutarenotneededfortheoverlaysizingcalculation method:'eldTypeResidualStressStateHawOrientation, LengthandDepthServiceIntervalReference SourceforAllowable HawSizeTherefore, forProgramSSFLAWrunsmadeinthiscalculation, theinputvaluesfortheseparameters areselectedasdefaultvalues.PromSSFLAWResultsAttachment 1presentstheprintoutfromProgramSSFLAWrunfortheaboveinputs.Theresultsshowthatanoverlaythickness of0.25-inch minimumisacceptable fortheappliedstresses.

ProgramSSFLAWwasdeveloped andusedinaccordance withtheMPRAssociates QualityAssurance Program.

e.~~s'i<seed~iiiMPud'+lcMPHAssociates, Inc.320KingStreetAlexandria, VA22314Calculation No.085-29542 PreparedByCheckedByPage75.0OVERLAYLENGTHCALCULATION CodeCaseN-504(Reference 5)providesthefoHowinginstruction fordetermining thelengthoftheoverlayrequiredbeyondeachedgeoftheobservedflaws:Length=0.75(R)(t)whereR=outerradiusandt=nominalwallthickness ofpipe.Accordingly, therequiredoverlaylengthbeyondeachendoftheobservedflawsforthis6-inchOD,schedule80pipeis:Length=0.75(6.625"/2)(0.432")=0.9"PerReference 6(Attachment 2),theobservedlengthoftheindication is0531-inch (equalto7/16-inch plus3/32-inch).

Therequiredlengthisthen:0.531"+2(0.9")=2.33"Use2.5-inchminimumlengthcenteredonthenozzlesideedgeoftheweldcrown.

rlP 5Asi<-%MowtsiMPRMPRAssociates, Inc.320KingStreetAlexandria, VA22314ggp/+Calculation No.085-295-02 PreparedBy6-CheckedByPage

85.0REFERENCES

"Evaluation ofFlawsinAustenitic SteelPiping,"SectionXITaskGroupforPipingFlawEvaluation (ASMECode),JournalOfPressureVesselTechnology, Volume108,No.3,August1986.2.MPRReportMPR-1037, Revision1,"SSFLAW-AComputerProgramtoEvaluateCracksinStainless SteelPiping(Version1.1),"April1988.3.Southwestern Engineering CompanyDrawing77528,Rev.17,"Regenerative Clean-upHeat4Exchanger" (forRWCUHXND-03).4.MPRCalculation 085-295-01, "NMP-1RWCUWeld33-FW-22OverlayDesign,StressesforInputtoProgramSSFLAW,"Revision0.5.ASMEBoilerAndPressureVesselCodeCaseN-504,datedApril30,1992.6.NMPCRadiographic Examination ReportforWeld33-FW-22dated5/15/97.PncludedasIAttachment 2.]

C.4m5J4-ggHora1MPRMPRAssociates, Inc.320KingStreetAlexandria, VA22314/DOP/$Calculation No.085-295-02 PreparedByMcs~CheckedByPage1ATTACHMENT 1SSFLAWProgramOutput I

ÃQeu0DOCNOO$S'.ZtS'-ozOft$SSFLAWVersion1.1(April5,1988)ATI'ACHMENT OFOverlaySizingCalculation Results33-FW-22WeldOverlaySizingDate:5/16/97PipeMaterial:

Type304Stainless SteelSm=16.67ksiSy=18.50ksiPipeGeometry:

OutsideDiameter=

WallThickness=

6.625in0.380inSystemOperating Conditions:

Pressure=

1300.0psigTemperature=

575.0FTensileStress(ksi)BendingStress(ksi)PressureStress(ksi)NormalConditions 0.4012.005.02FaultedConditions 0.4012.005.02RequiredWeldOverlayDimensions:

OverlaThickness=

0.233inverlayLength=1.

WMPR5'I4-39<o/2MPRAssociates, Inc.320KingStreetAlexandria, VA22314Calculation No.085-295-02 PreparedByCheckedByPage1ATTACHMENT 2Radiographic Examination ReportforWeld33-FiV-22 dated5/15/97

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