Designation:E2003−10(Reapproved2014)StandardPracticeforFabricationoftheNeutronRadiographicBeamPurityIndicators1ThisstandardisissuedunderthefixeddesignationE2003;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1ThispracticecoversthematerialandfabricationofaBeamPurityIndicator(BPI),whichcanbeusedtodeterminetherelativequalityofradiographicimagesproducedbydirect,thermalneutronradiographicexamination.1.2ThevaluesstatedinSIunitsareregardedtobestandard.1.3Thisstandarddoesnotpurporttoaddressthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappropriatesafetyandhealthpracticesanddeterminetheapplicabilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2E543SpecificationforAgenciesPerformingNondestructiveTestingE545TestMethodforDeterminingImageQualityinDirectThermalNeutronRadiographicExaminationE748PracticesforThermalNeutronRadiographyofMate-rialsE1316TerminologyforNondestructiveExaminations3.Terminology3.1Definitions—Fordefinitionsoftermsusedinthispractice,seeTerminologyE1316,SectionH.4.SummaryofPractice4.1TheBPIisusedforquantitativedeterminationofthermalneutronradiographicquality.Itconsistsofapolytet-rafluoroethyleneblockcontainingtwoboronnitridedisks,twoleaddisksandtwocadmiumwires.Akeyfeatureofthedeviceistheabilitytomakevisualanalysisofitsimageforsubjectivequalityinformation.Densitometricmeasurementsoftheimageofthedevicepermitquantitativedeterminationofradiographiccontrast,low-energyphotoncontribution,pairproductioncontribution,imageunsharpness,andinformationregardingfilmandprocessingquality.4.2NeutronradiographypracticesarediscussedinPracticeE748.5.SignificanceandUse5.1TheBPIisdesignedtoyieldquantitativeinformationconcerningneutronbeamandimagesystemparametersthatcontributetofilmexpo...
