Designation:C1453−00(Reapproved2011)StandardTestMethodfortheDeterminationofUraniumbyIgnitionandtheOxygentoUranium(O/U)AtomicRatioofNuclearGradeUraniumDioxidePowdersandPellets1ThisstandardisissuedunderthefixeddesignationC1453;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thistestmethodcoversthedeterminationofuraniumandtheoxygentouraniumatomicratioinnucleargradeuraniumdioxidepowderandpellets.1.2Thistestmethoddoesnotincludeprovisionsforpre-ventingcriticalityaccidentsorrequirementsforhealthandsafety.Observanceofthistestmethoddoesnotrelievetheuseroftheobligationtobeawareofandconformtoallinternational,national,orfederal,stateandlocalregulationspertainingtopossessing,shipping,processing,orusingsourceorspecialnuclearmaterial.1.3Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.1.4ThistestmethodalsoisapplicabletoUO3andU3O8powder.2.ReferencedDocuments2.1ASTMStandards:2C696TestMethodsforChemical,MassSpectrometric,andSpectrochemicalAnalysisofNuclear-GradeUraniumDi-oxidePowdersandPelletsC753SpecificationforNuclear-Grade,SinterableUraniumDioxidePowderC776SpecificationforSinteredUraniumDioxidePelletsC1267TestMethodforUraniumbyIron(II)ReductioninPhosphoricAcidFollowedbyChromium(VI)TitrationinthePresenceofVanadiumC1287TestMethodforDeterminationofImpuritiesinNuclearGradeUraniumCompoundsbyInductivelyCoupledPlasmaMassSpectrometry3.SummaryofTestMethod3.1AweighedportionofUO2isconvertedtoU3O8byrepeatedignitionat900°Cinair,toaconstantweight.Correctionsaremadefornonvolatileandvolatileimpuritiesincludingmoisture,basedonindependentdeterminationsde-scribedinTestMethodsC696andC1287.3,44....
