Designation:E185−15´1StandardPracticeforDesignofSurveillanceProgramsforLight-WaterModeratedNuclearPowerReactorVessels1ThisstandardisissuedunderthefixeddesignationE185;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ParagraphX1.8wascorrectededitoriallyinOctober2015.1.Scope1.1Thispracticecoversproceduresfordesigningasurveil-lanceprogramformonitoringtheradiation-inducedchangesinthemechanicalpropertiesofferriticmaterialsinlight-watermoderatednuclearpowerreactorvessels.Newadvancedlight-watersmallmodularreactordesignswithanominaldesignoutputof300MWeorlesshavenotbeenspecificallyconsid-eredinthispractice.Thispracticeincludestheminimumrequirementsforthedesignofasurveillanceprogram,selec-tionofvesselmaterialtobeincluded,andtheinitialscheduleforevaluationofmaterials.1.2Thispracticewasdevelopedforalllight-watermoder-atednuclearpowerreactorvesselsforwhichthepredictedmaximumfastneutronfluence(E>1MeV)exceeds1×1021neutrons/m2(1×1017n/cm2)attheinsidesurfaceoftheferriticsteelreactorvessel.1.3Thispracticedoesnotprovidespecificproceduresformonitoringtheradiationinducedchangesinpropertiesbeyondthedesignlife.PracticeE2215addresseschangestothewithdrawalscheduleduringandbeyondthedesignlife.1.4ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.NOTE1—Theincreasedcomplexityoftherequirementsforalight-watermoderatednuclearpowerreactorvesselsurveillanceprogramhasnecessitatedtheseparationoftherequirementsintothreerelatedstan-dards.PracticeE185describestheminimumrequirementsfordesignofasurveillanceprogram.PracticeE2215describestheproceduresfortestingandevaluationofsurveillancecapsulesremovedfromareactorvessel.GuideE636providesguidanceforconductingadditionalmechanicaltests.AsummaryofthemanymajorrevisionstoPracticeE185sinceitso...
