Designation:C1408−16StandardTestMethodforCarbon(Total)inUraniumOxidePowdersandPelletsByDirectCombustion-InfraredDetectionMethod1ThisstandardisissuedunderthefixeddesignationC1408;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofcarboninnuclear-gradeuraniumoxidepowdersandpelletstodeterminecompliancewithspecifications.1.2Gadoliniumoxide(Gd2O3)andgadoliniumoxide-uraniumoxidepowdersandpelletsmayalsobeanalyzedusingthistestmethod.1.3Thistestmethodcoversthedeterminationof5to500µgofresidualcarbon.1.4Thistestmethoddescribesaninductionfurnacecarriergascombustionsystemequippedwithaninfrareddetector.Itmayalsobeappliedtoasimilarinstrumentequippedwithathermalconductivitydetector.1.5ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.1.5.1Thepreferredsystemofunitsismicrogramscarbonpergramofsample(µg/gsample)ormicrogramscarbonpergramofuranium(µg/gU).1.6Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.2.ReferencedDocuments2.1ASTMStandards:2C753SpecificationforNuclear-Grade,SinterableUraniumDioxidePowderC776SpecificationforSinteredUraniumDioxidePelletsC859TerminologyRelatingtoNuclearMaterialsC888SpecificationforNuclear-GradeGadoliniumOxide(Gd2O3)PowderC922SpecificationforSinteredGadoliniumOxide-UraniumDioxidePellets2.2NISTStandard:3NISTSRM101GStandardReferenceMaterials—StainlessSteel3.Terminology3.1Definitions—Exceptasotherwisedefinedherein,defini-tionsoftermsaregiveninTerminologyC859.3.2DefinitionsofTermsSpecifictoThisStandard:3.2.1accelerator—anigniterandafluxwhichpromotesbothcombustiona...
