ASTM_C_922_-_14.pdf

Designation:C92214Standard Specification forSintered Gadolinium Oxide-Uranium Dioxide Pellets1This standard is issued under the fixed designation C922;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.INTRODUCTIONThis specification is intended to provide the nuclear industry with a general specification forgadolinium oxide-uranium dioxide pellets.It recognizes the diversity of manufacturing methods bywhich gadolinium oxide-uranium dioxide pellets are produced and the many special requirements forchemical and physical characterization that may be imposed by the operating conditions to which thepellets will be subjected in specific reactor systems.Therefore,it is anticipated that the purchaser maysupplement this specification with additional requirements for specific applications.1.Scope1.1 This specification is for finished sintered gadoliniumoxide-uranium dioxide pellets for use in light-water reactors.Itapplies to gadolinium oxide-uranium dioxide pellets contain-ing uranium of any235U concentration and any concentrationof gadolinium oxide.1.2 This specification recognizes the presence of repro-cessed uranium in the fuel cycle and consequently definesisotopic limits for gadolinium oxide-uranium dioxide pelletsmade from commercial grade UO2.Such commercial gradeUO2is defined so that,regarding fuel design and manufacture,the product is essentially equivalent to that made from unirra-diated uranium.UO2falling outside these limits cannot neces-sarily be regarded as equivalent and may thus need specialprovisions at the fuel fabrication plant or in the fuel design.1.3 This specification does not include(1)provisions forpreventing criticality accidents or(2)requirements for healthand safety.Observance of this specification does not relieve theuser of the obligation to be aware of and conform to allinternational,federal,state,and local regulations pertaining topossessing,shipping,processing,or using source or specialnuclear material.Examples of U.S.Governmental documentsare Code of Federal Regulations(Latest Edition),Title 10,Part50,Title 10,Part 71,and Title 49,Part 173.1.4 The following precautionary caveat pertains only to thetechnical requirements portion,Section 4,of this specification:This standard does not purport to address all of the safetyconcerns,if any,associated with its use.It is the responsibilityof the user of this standard to establish appropriate safety andhealth practices and determine the applicability of regulatorylimitations prior to use.2.Referenced Documents2.1 ASTM Standards:2C753 Specification for Nuclear-Grade,Sinterable UraniumDioxide PowderC859 Terminology Relating to Nuclear MaterialsC888 Specification for Nuclear-Grade Gadolinium Oxide(Gd2O3)PowderC968 Test Methods for Analysis of Sintered GadoliniumOxide-Uranium Dioxide PelletsC996 Specification for Uranium Hexafluoride Enriched toLess Than 5%235UE105 Practice for Probability Sampling of Materials2.2 ANSI Standard:3ANSI/ASME NQA-1 Quality Assurance Requirements forNuclear Facility Applications2.3 U.S.Government Documents:4Code of Federal Regulations(Latest Edition),Title 10,Part50,Domestic Licensing of Production and UtilizationFacilitiesCode of Federal Regulations,Title 10,Part 71,Packagingand Transportation of Radioactive Material1This 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 Jan.1,2014.Published February 2014.Originallyapproved in 1983.Last previous edition approved in 2008 as C922 08.DOI:10.1520/C0922-14.2For 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.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,Washington,DC 20401,http:/www.gpo.gov/fdsys/browse/collectionCfr.action?collectionCode-CFR.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 Code of Federal Regulations,Title 49,Part 173,ShippersGeneral Requirements for Shipments and PackagingsRegulatory Guide 1.126,An Acceptable Model and RelatedStatistical Methods for the Analysis of Fuel Densification,current version53.Terminology3.1 DefinitionsFor definitions of terms,refer to Terminol-ogy C859.4.Technical Requirements4.1 Major ConstituentsGadolinium oxide-uranium diox-ide pellets shall be fabricated using major constituents thatmeet the requirements of Specif