1、Designation:C78803(Reapproved 2015)Standard Specification forNuclear-Grade Uranyl Nitrate Solution or Crystals1This standard is issued under the fixed designation C788;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last
2、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 This specification applies to nuclear-grade aqueousuranyl nitrate solution or crystals not exceeding 5%235Uintended for subseque
3、nt manufacture into either UF6(for feedto an enrichment plant)or direct conversion to uranium oxide(for use in reactors).1.2 This specification is intended to provide the nuclearindustry with a general standard for aqueous uranyl nitratesolution or crystals.It recognizes the diversity of manufactur-
4、ing methods and the processes to which it is subsequently to besubjected.It is therefore anticipated that it may be necessary toinclude supplementary specification limits by agreement be-tween purchaser and manufacturer.Different limits are appro-priate depending on whether or not the uranyl nitrate
5、 is to beconverted to UF6for subsequent processing.1.3 The purpose of this specification is:(a)to define theimpurity and uranium isotope limits for commercial standarduranyl nitrate,and(b)to define additional limits for repro-cessed uranyl nitrate(or any mixture of reprocessed andcommercial standard
6、 uranyl nitrate).For such uranyl nitrates,special provisions may need to be made to ensure that no extrahazard arises to the employees,the process equipment,or theenvironment.1.4 The scope of this specification does not comprehen-sively cover all provisions for preventing criticality accidents,for h
7、ealth and safety,or for shipping.Observance of thisstandard does not relieve the user of the obligation to conformto all international,federal,state and local regulations forprocessing,shipping,or any other way of using the uranylnitrate.An example of a U.S.Government Document is theCode of Federal
8、Regulations,Title 10,Part 50(latest edition).1.5 The values stated in SI units are to be regarded asstandard.No other units of measurement are included in thisstandard.1.6 This standard does not purport to address all of thesafety concerns,if any,associated with its use.It is theresponsibility of th
9、e user of this standard to establish appro-priate safety and health practices and determine the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C787 Specification for Uranium Hexafluoride for Enrich-mentC799 Test Methods for Chemical,Mass Spectrometric
10、,Spectrochemical,Nuclear,and Radiochemical Analysis ofNuclear-Grade Uranyl Nitrate SolutionsC859 Terminology Relating to Nuclear MaterialsC996 Specification for Uranium Hexafluoride Enriched toLess Than 5%235UC1233 Practice for Determining Equivalent Boron Contentsof Nuclear MaterialsC1295 Test Meth
11、od for Gamma Energy Emission fromFission and Decay Products in Uranium Hexafluoride andUranyl Nitrate Solution2.2 ANSI Standard:3ANSI/ASME NQA-1 Quality Assurance,Requirements forNuclear Facility Applications2.3 U.S.Government Document:4Code of Federal Regulations,Title 10,(Energy),Part 50,Domestic
12、Licensing of Production and Utilization Facili-ties3.Terminology3.1 Definitions of Terms Specific to This Standard:3.1.1 Terms shall be defined in accordance with Terminol-ogy C859,except for the following:3.1.1.1 commercial standard uranyl nitraterefers to ura-nyl nitrate made from unirradiated ura
13、nium.However,it isrecognized that some contamination with reprocessed uranium1This specification is under the jurisdiction of ASTM Committee C26 onNuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.02 on Fueland Fertile Material Specifications.Current edition approved June 1,201
14、5.Published June 2015.Originallyapproved in 1976.Last previous edition approved in 2009 as C788 03(2009).DOI:10.1520/C0788-03R15.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,r
15、efer to the standards Document Summary page onthe ASTM website.3Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.4Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washin
16、gton,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 may occur during routine processing;this is acceptable,pro-vided that the product meets the specification for commercialstandard uranyl nitrate as defined in 4.2.3.1.1.2 reprocessed uranyl nitraterefers to any uranylnitrate made from uranium that has been exposed in a neutronirradiation facility and subsequently chemically separated fromthe fission