TheProgeressontheSafetyAssessmentTechnologiesofPressurePipingInthispaper,thesafetyassessmenttechnologiesofpressurepipingwithdefectsarebrieflyintroducedandappraised.Onthebasistheproposalsonthestudyanddevelopmentofassessmenttechnologiesofpressurepipingwithdefectsareexpressed.:,,,,(),,,(),,;,,,,,,,,,,1,,,,,,,,111(NSC,NetSectionCollapse)85Kanninen[1],(),,,,MNRCMNRC=2RfR2t(2sinB-fsinA)Rf,(MPa);R,t(mm);A;B;fat,f=aöt,Kurihara[2],BCL(BattelleColumbusLaboratory)Wilkowski[3],NSC,:(1)(DPZP,DimensionlessPlasticZoneParameter),MPZ,ASMEIWB-3650Z,,MPZ=2Parccos[e-C(DPZP)]DPZP=2EJiP2DRf2D;E;Ji;Rf,;C,,,95%,C=314;(2)Mf,(RyRu),Mf=(Ry+Ru)(Ry+Ru),,Mf=110(3),,,,MV,Röt,,Röt,,MVRöt,M:M=(MPZMfMV)MNSCMNSC112[45]StuttgartMPA(MaterialPruefungsAnstalt),,,Ru,MM=IX3a(Ru-AwAq-Afpi)-(Y3+b)AwpiIX3,mm4;a,mm;b,mm;pi,MPa;Y3,mm;AwAqAf95,mm22J,J,J,J(JR),J=J1C:dJda=dJmat1daJ1C(Nömm);dJöda,dJmat1ödadaJ,,,J,JJeJp,Je,K21öE;Jp,,,,211J[6],,,LBB(LeakBeforeBreak):21111GE-EPRI[78](EPRI)KumarRam2berg-Osgood,aeff,JJ=f1(M2öE)+AR0E0a(1-HöP)h1(MöM0)n+121112Paris-Tada[9]ParisTada,Irwin,,,,,,MÁ,JJeJpJe=E(PR)(1+H)2(Áce)2Jp=RfRFj(H)Mp(H)Up0M(H)dÁp,,,,21113LBB-NRC[10](NRC)LBBParis-Tada,,,ÁpÁe,RÁ,JÁp=A(RöRf)n-1ÁeÁeHeff,Áe=Áe(Heff),Irwin,06,,,21114LBB-ENGBCL,,:(1)LBB-ENG21[1112]J,GE-EPRI,,(2H30),,(2H30),Paris-Ta2daJJ=K21E+Fj(H)4RtM0(H)Ácp0M(H)dÁcp(2H30)J=K21E+AR0E0G(H)H(H,n)[M4R0R2tM0(H)]n+1(2H30)(2)LBB-ENG22[1314],,te,le,,,ROLBB-ENG1,G(H)H(H,n),,RO212J,,:21211SC-TNPSC-TKP(SC-TNP1SC-TKP1)[1516]BCL(1987)GEöEPRI,GEöEPRIJJp,360h,SC-TNP1SC-TKP1,SC-TNP1SC-TKP1:SC-TNP1,,SC-TKP121212SC-TNP1SC-TKP1(SC-TNP2SC-TKP2)[17]BCLSC-TNP1SC-TKP1,,3DSC-TNP2SC-TKP2SC-TNP1SC-TKP1,:GEöEPRIh,(aöt=01875),LL,,J21213SC-ENG[18]BCL(,),:(1);(2)RO;(3),16,LBBENG2J,Je,Jp:Jp=M0ÁcpdM=AM0ÁcpdMÁcp=C^MnÁcp;M;n;C^,NSC,NSCKanninenKuriharaNSC,SC-ENG,SC-ENG1,SC-ENG2,SC-ENG2(SC-TNP,SC-TKP)3R6()[1920]R6(CEGB),,,(Kr=K1öK1c),(Lr=pöp0),R6,,(RöHöR6,Revi2sion3)[21],,ASMEIWB-3640IWB-36501990,R69,LBB,,R6,:,EPRI,;9LBB,LBB[Kr=f(Lr,T)]4ASMEÓIWB-3640IWB-3650[2223]ASMEÓ,IWB-3640C,IWB-3650H,,,R6,;,;,,Z,Z,[2427],,(1)BCLZ,ASMEÓ[18];(2)ASME-ÓIWB-3640IWB-3650,,[28]265,,,Wilkowski[18]WilkowskiNRCPIPES(NRCPIPESV.2.0a)44,28;16,SC-TNP1,(MEöC),281102,0114;BCLDPZPASMEIWB3640C,MEöC11181119,01170121;ASMEIWB-3650H,MEöC1187,0116DPZP,16MEöC1105,0113;SC-TNP1ASMEIWB3640C,MEöC11101116,01150119;ASMEIWB-3650H,MEöC2114,0129,DPZP,SC-TNP1;ASMEIWB-3650H,,SC-TNP2SC-TKP2SC-ENG,,,JRCTCTLC,,LRLRJLCSC-TNP1,JR,,SC-TNP16,,,,611,,J,,ASMEIWB-3640IWB-3650,,,,,,,,ASMEZU[29];[30],36612,,,,,,,,Hong,S.Y.[31],,Paris,,NabilG.Awadalla[32],,,Nilson,F[33],Rahman,S.Puls,M.P.LBB[3435],[36],[37]613,,BattelleColumbusLabo2ratoryNRCPIPE[38],J,;BMW(BoilerMaintenanceWorksta-tion)[39],Stuttgart(MPA),ELBA[40],;ESR()[41],[42];,[43],[44]11Kanninen,M.F.,andOthers.MechanicalFracturePredictionsforSensitizedStainlessSteelPipingwithCircumferentialCracks.FinalReport,EPRINP-192,September197621Kurihara,R.,Ueda,S.,andSturm,D..EstimationoftheDuctileUnstableFractureofPipewithCir2cumferentialSurfaceCrackSubjectedtoBending.NuclearEngineeringandDesign,Vol.106,PP.265273,198831G.M.Wilkowski,J.Ahmad,et.al.DegradedPiping-PhaseÊ.NUREGöCR-4082,BMI-2120,Vol.5.U.S.NuclearRegulatoryCommission.198641Kussmaul,K.,Diem,D.,Blind,D.,Eisele,U.,Stadtmuller,W..InfluenceofMaterialCharacteris2ticsonCrackInitiationAssessmentofAusteniticPip2ing.SMiRT-13Conference,PortoAlehre,Brazil:August199551Julisch,P.,Sturm,D.,Wiedermann,W..Exclu2sionofRuptureforWeldedPipingofPowerStationsbyComponentTestsandFailureApproaches.Nucle2arEngineeringandDesign.1995,158:19120161Brust,F.W..ApproximateMethodsforFractureAnalysesofThrough-WallCrackedPipes.NUREGöCR-4853,BMI-2145,U.S.NuclearRegulatoryCommission.Feb.198771Kumar,V.,German,M.,andShih,C..AnEngi2neeringApproachforElastic-PlasticFractureAnal2ysis.EPRIReportNP-1931,ElectricPowerRe2searchInstitute,PaloAlto,CA,July198181Kumar,V.,German,M.,andWilkening,W.,46Andrews,W..AdvanceinElastic-PlasticFractureAnalyses.EPRIFinalReportNP-3067,ElectricPowerResearchInstitute,PaloAlto,CA,August198491Paris,P.C.,andTada,H..TheApplicationofFractureProofDesignMethodsUsingTearingInsta2bilityTheorytoNuclearPipingPostulatingCircum2ferentialThrough-WallCracks.NUREGöCR-3464,September1983101Klecker,R.,Brust,F.,andWilkowski,G.M..NRCLeak-Before-Break(LBBNRC)AnalysisMethodforCircumferentiallyThrough-WallCrackedPipesunderAxialPlusBendingLoads.NUREGöCR-4572,May1986111Gilles,P.,andBrust,F..ApproximateFractureMethodforPipes-PartÉ:Theory.NuclearEngi2neeringandDesign.127:1-27.1991121Gilles,P.,Chao,K.S.,Brust,F..ApproximateFractureMethodforPipes-PartÊ:Applicatons.NuclearEngineeringandDesegn.127:13-31.1991131Rahman,S.,Brust,F.,Nakagaki,M.,Gilles,P..AnApproximateMethodforEstimatingEner2gyReleaseRatesofThrough-WallCrackedPipeWeldments.FatigueFracture,andRisk,PVP215,SanDiego,California:1991141RahmanS,BrustF,.AnEstimationMethodforEvaluatingEnergyReleaseRatesofCircumferentialThrough-WallCrackedPipeWelds.EngineeringFractureMechanics.43(3):417-430.1992151Kumar,V.,German,M.D..Elastic-PlasticFractureAnalysisofThrough-Wal