Designation:E2023−10(Reapproved2014)StandardPracticeforFabricationofNeutronRadiographicSensitivityIndicators1ThisstandardisissuedunderthefixeddesignationE2023;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThispracticecoversthefabricationofSensitivityIndi-cators(SI),whichcanbeusedtodeterminetherelativequalityofradiographicimagesproducedbydirect,thermalneutronradiographicexamination.1.2Thevaluesstatedininch-poundunitsareregardedtobestandard.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E543SpecificationforAgenciesPerformingNondestructiveTestingE545TestMethodforDeterminingImageQualityinDirectThermalNeutronRadiographicExaminationE748PracticesforThermalNeutronRadiographyofMate-rialsE1316TerminologyforNondestructiveExaminations3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthispractice,seeTerminologyE1316,SectionH.4.SummaryofPractice4.1TheSensitivityIndicator(SI)isusedforqualitativedeterminationofthesensitivityofdetailvisibleontheneutronradiograph.Itconsistsofastepwedgecontaininggapsandholesofknowndimensions.Visualinspectionoftheimageofthisdeviceprovidessubjectiveinformationregardingtotalradiographicsensitivitywithrespecttothestep-blockmaterial,aswellasoptionalsubjectivedata,regardingdetrimentallevelsofgammaexposure.4.2NeutronradiographypracticesarediscussedinPracticesE748.TheneutronradiographusedtodetermineimagequalityusingtheSIshallmeettherequirementsofMethodE545.5.SignificanceandUse5.1Theonlytrulyvalidimagequalityindicatorisamaterialorcomponent,equivalenttothepartbeingneutronradiographed,withaknownstandarddis...
