Designation:C787−15StandardSpecificationforUraniumHexafluorideforEnrichment1ThisstandardisissuedunderthefixeddesignationC787;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisspecificationcoversuraniumhexafluoride(UF6)intendedforfeedingtoanenrichmentplant.IncludedarespecificationsforUF6derivedfromunirradiatednaturalura-niumandUF6derivedfromirradiateduraniumthathasbeenreprocessedandconvertedtoUF6forenrichmentandsubse-quentreuse.Theobjectivesofthisspecificationaretwofold:(1)TodefinetheimpurityanduraniumisotopelimitsforCommercialNaturalUF6feedstock;and(2)Todefineaddi-tionallimitsforReprocessedUF6(oranymixtureofRepro-cessedUF6andCommercialNaturalUF6).ForsuchUF6,specialprovisionsmaybeneededtoensurethatnoextrahazardarisestotheworkforce,processequipment,ortheenviron-ment.1.2Thescopeofthisspecificationdoesnotcomprehen-sivelycoverallprovisionsforpreventingcriticalityaccidentsorrequirementsforhealthandsafetyorforshipping.Obser-vanceofthisspecificationdoesnotrelievetheuseroftheobligationtoconformtoallinternational,federal,state,andlocalregulationsforprocessing,shipping,orinanyotherwayusingUF6(see,forexample,TID-7016,DP-532,ORNL-NUREG-CSD-6,andDOEO474.1).1.3ThevaluesstatedinSIunitsaretoberegardedasthestandard.Thevaluesgiveninparenthesesareforinformationonly.2.ReferencedDocuments2.1ASTMStandards:2C761TestMethodsforChemical,MassSpectrometric,Spectrochemical,Nuclear,andRadiochemicalAnalysisofUraniumHexafluorideC859TerminologyRelatingtoNuclearMaterialsC996SpecificationforUraniumHexafluorideEnrichedtoLessThan5%235UC1052PracticeforBulkSamplingofLiquidUraniumHexafluorideC1295TestMethodforGammaEnergyEmissionfromFissionandDecayProductsinUraniumHexafluorideandUranylNitrateSolutionC1703PracticeforSamplingofGaseousUraniumHexafluoride2.2ANSIStandard:N14.1PackagingofUran...
