1、Designation:C107510Standard Practices forSampling Uranium-Ore Concentrate1This standard is issued under the fixed designation C1075;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 ind
2、icates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.1.Scope1.1 These practices are intended to provide the nuclearindustry with procedures for obtaining representative bulksamples from uranium-ore concentrates(UOC)(see Specific
3、a-tion C967).1.2 These practices also provide for obtaining a series ofrepresentative secondary samples from the original bulksample for the determination of moisture and other testpurposes,and for the preparation of pulverized analyticalsamples(see Test Methods C1022).1.3 These practices consist of
4、 a number of alternativeprocedures for sampling and sample preparation which havebeen shown to be satisfactory through long experience in thenuclear industry.These procedures are described in the follow-ing order.StageProcedureSectionPrimary SamplingOne-stage falling stream4Two-stage falling stream5
5、Auger6Secondary SamplingStraight-path(reciprocating)7Rotating(Vezin)8,9Sample Preparation10Concurrent-drying11 13Natural moisture14 16Calcination17,18Sample Packaging19Wax sealing20Vacuum sealing211.3.1 The primary and secondary sampling stages can beorganized in the following way:1.3.2 It is possib
6、le to combine the various elements of thesestages in different ways to give satisfactory results dependingon the agreed requirements of the contracting parties.For agiven stage,however,each procedure must be regarded as awhole.It is highly inadvisable to mix elements belonging todifferent procedures
7、.1.4 These procedures do not include requirements forhealth,safety,and accountability.The observance of thesepractices does not relieve the user of the obligation to be awareof and to conform to all applicable international,federal,state,and local regulations pertaining to processing,shipping,orusin
8、g uranium-ore concentrates.(Guidance is provided in CFR10,Chapter 1.)1.5 The values stated in SI units are to be regarded as thestandard.The values given in parentheses are for informationonly.1.6 This standard does not purport to address all of thesafety problems,if any,associated with its use.It i
9、s 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.2.Referenced Documents2.1 ASTM Standards:2C967 Specification for Uranium Ore ConcentrateC1022 Test Methods for Chemical and A
10、tomic AbsorptionAnalysis of Uranium-Ore Concentrate2.2 Other Document:CFR 10 Nuclear Materials Licensing Code of FederalRegulations,Chapter 133.General Requirements3.1 Material Requirements:3.1.1 The uranium-ore concentrates shall be free-flowingand of a particle size not to exceed 6 mm(0.25 in.)or
11、suchother limit agreed upon between contracting parties.1These practices are under the jurisdiction ofASTM Committee C26 on NuclearFuel Cycle and are the direct responsibility of Subcommittee C26.02 on Fuel andFertile Material Specifications.Current edition approved Jan.1,2010.Published February 201
12、0.Originallyapproved in 1986.Last previous edition approved in 2004 as C1075 93(2004).DOI:10.1520/C1075-10.2For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Sevice at serviceastm.org.For Annual Book of ASTMStandardsvolume information,refer to the standards Do
13、cument Summary page onthe ASTM website.3Available from U.S.Government Printing Office Superintendent of Documents,732 N.Capitol St.,NW,Mail Stop:SDE,Washington,DC 20401,http:/www.access.gpo.gov.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United Stat
14、es1 3.1.2 The average moisture content shall not exceed 5.0%weight of the uranium-ore concentrates.3.1.3 The material shall be shipped to the sampling plant in200-L(55-gal)standard steel drums that are fitted with steellids and equipped with suitable gasket,sealing rings,andsealing bungs(if applicab
15、le)to ensure weatherproofing.Thedrums shall be constructed so that the top of the drum is fullyopen when the lid is removed.3.1.4 The number of drums in a sampling lot shall notexceed 90 and the gross weight shall not exceed 45 metric tons(100 000 lb).3.1.5 Aminimum number of drums in a sampling lot
16、 may beestablished depending upon the sampling procedure used.3.2 Sampling Equipment Requirements:3.2.1 Care shall be taken in the design and operation of thesampling and all associated equipment to minimize the ex-changes of air between the atmosphere and the samplingsystem.For obvious safety reasons dust-carrying internal airmust be prevented from escaping the system.This is achievedby means of dust collectors.The latter,however,shall bedesigned and operated in such a way that a minimum amount
