ASTM_C_761_-_11.pdf

Designation:C76111Standard Test Methods forChemical,Mass Spectrometric,Spectrochemical,Nuclear,and Radiochemical Analysis of Uranium Hexafluoride1This standard is issued under the fixed designation C761;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These test methods cover or give reference to proce-dures for subsampling and for chemical,mass spectrometric,spectrochemical,nuclear,and radiochemical analysis of ura-nium hexafluoride(UF6).Most of these test methods are inroutine use to determine conformance to UF6specifications inthe Enrichment and Conversion Facilities.1.2 The analytical procedures in this document appear in thefollowing order:NOTE1Subcommittee C26.05 will confer with C26.02 concerning therenumbered section in Test Methods C761 to determine how concernswith renumbering these sections are best addressed in subsequent publi-cations as analytical methods are replaced with stand-alone analyticalmethods.SectionsSubsampling of Uranium Hexafluoride7Gravimetric Determination of Uranium8 16Titrimetric Determination of Uranium17Preparation of High-Purity U3O818Isotopic Analysis19Determination of Hydrocarbons,Chlorocarbons,and PartiallySubstituted Halohydrocarbons2026Determination of Antimony27Determination of Bromine28Determination of Chlorine29 35Determination of Silicon and Phosphorus36 42Determination of Boron and Silicon43Determination of Ruthenium44Determination of Titanium and Vanadium45Spectrographic Determination of Metallic Impurities46Determination of Tungsten47Determination of Thorium and Rare Earths48Determination of Molybdenum49Atomic Absorption Determination of Metallic Impurities50 55Impurity Determination by Spark-Source Mass Spectrography56Determination of Boron-Equivalent Neutron Cross Section57Determination of Uranium-233 Abundance by Thermal IonizationMass Spectrometry58Determination of Uranium-232 by Alpha Spectrometry59 65Determination of Fission Product Activity66Determination of Plutonium by Ion Exchange and AlphaCounting67 71Determination of Plutonium by Extraction and Alpha Counting72 79Determination of Neptunium by Extraction and Alpha Counting80 87Atomic Absorption Determination of Chromium Soluble InUranium Hexafluoride88 94Atomic Absorption Determination of Chromium Insoluble InUranium Hexafluoride95 101Determination of Technetium-99 In Uranium Hexafluoride102 110Method for the Determiation of Gamma-Energy Emission Ratefrom Fission Products in Uranium Hexafluoride111Determination of Metallic Impurities by ICP-AES112 121Determination of Molybdenum,Niobium,Tantalum,Titanium,and Tungsten by ICP-AES122 1311.3 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.4 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of the user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.(For specificsafeguard and safety consideration statements,see Section 6.)2.Referenced Documents2.1 The following documents of the issue in effect on dateof material procurement form a part of this specification to theextent referenced herein:2.2 ASTM Standards:2C787 Specification for Uranium Hexafluoride for Enrich-mentC799 Test Methods for Chemical,Mass Spectrometric,Spectrochemical,Nuclear,and Radiochemical Analysis ofNuclear-Grade Uranyl Nitrate SolutionsC859 Terminology Relating to Nuclear MaterialsC996 Specification for Uranium Hexafluoride Enriched toLess Than 5%235UC1128 Guide for Preparation of Working Reference Materi-als for Use in Analysis of Nuclear Fuel Cycle Materials1These test methods are under the jurisdiction of ASTM Committee C26 onNuclear Fuel Cycle and are the direct responsibility of Subcommittee C26.05 onMethods of Test.Current edition approved May 15,2011.Published July 2011.Originallyapproved in 1973.Last previous edition approved in 2004 as C761 041.DOI:10.1520/C0761-11.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 C1219 Test Methods for Arsenic in Uranium Hexafluoride(Withdrawn 2015)3C1233 Practice for Determining Equivalent Boron Contentsof Nuclear MaterialsC1267 Test Method for Uranium by Iron(II)Reduction inPhosphoric Acid Followed by Chromium(VI)Titration inthe Presence of VanadiumC1287 Test Method for Determination of Impurities inNuclear Grade Uranium Compounds by InductivelyCoupled Plasma Mass Spect