1、Designation:C120710Standard Test Method forNondestructive Assay of Plutonium in Scrap and Waste byPassive Neutron Coincidence Counting1This standard is issued under the fixed designation C1207;the number immediately following the designation indicates the year oforiginal adoption or,in the case of r
2、evision,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 This test method describes the nondestructive assay ofscrap or waste for plutonium content using passiv
3、e thermal-neutron coincidence counting.This test method provides rapidresults and can be applied to a variety of carefully sortedmaterials in containers as large as several thousand liters involume.The test method applies to measurements of238Pu,240Pu,and242Pu and has been used to assay items whose
4、totalplutonium content ranges from 10 mg to 6 kg(1).21.2 This test method requires knowledge of the relativeabundances of the Pu isotopes to determine the total Pu mass(Test Method C1030).1.3 This test method may not be applicable to the assay ofscrap or waste containing other spontaneously fissioni
5、ng nu-clides.1.3.1 This test method may give biased results for measure-ments of containers that include large amounts of hydrogenousmaterials.1.3.2 The techniques described in this test method havebeen applied to materials other than scrap and waste(2,3).1.4 This test method assumes the use of shif
6、t-register-basedcoincidence technology(4).1.5 Several other techniques that are often encountered inassociation with passive neutron coincidence counting existThese include neutron multiplicity counting(5,6,Test MethodC1500),add-a-source analysis for matrix correction(7),fluxprobes also for matrix c
7、ompensation,cosmic-ray rejection(8)to improve precision close to the detection limit,and alterna-tive data collection electronics such as list mode data acquisi-tion.Passive neutron coincidence counting may also be com-bined with certain active interrogation schemes as in TestMethods C1316 and C1493
8、.Discussions of these establishedtechniques are not included in this method.1.6 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
9、the applica-bility of regulatory limitations prior to use.2.Referenced Documents2.1 ASTM Standards:3C986 Guide for Developing Training Programs in theNuclear Fuel Cycle(Withdrawn 2001)4C1009 Guide for Establishing and Maintaining a QualityAssurance Program forAnalytical Laboratories Within theNuclea
10、r IndustryC1030 Test Method for Determination of Plutonium IsotopicComposition by Gamma-Ray SpectrometryC1068 Guide for Qualification of Measurement Methods bya Laboratory Within the Nuclear IndustryC1128 Guide for Preparation of Working Reference Materi-als for Use in Analysis of Nuclear Fuel Cycle
11、 MaterialsC1133 Test Method for Nondestructive Assay of SpecialNuclear Material in Low-Density Scrap and Waste bySegmented Passive Gamma-Ray ScanningC1210 Guide for Establishing a Measurement System Qual-ity Control Program for Analytical Chemistry Laborato-ries Within the Nuclear IndustryC1316 Test
12、 Method for Nondestructive Assay of NuclearMaterial in Scrap and Waste by Passive-Active NeutronCounting Using252Cf ShufflerC1458 Test Method for Nondestructive Assay of Plutonium,Tritium and241Am by Calorimetric AssayC1490 Guide for the Selection,Training and Qualification ofNondestructive Assay(ND
13、A)PersonnelC1493 Test Method for Non-Destructive Assay of NuclearMaterial in Waste by Passive and Active Neutron Count-ing Using a Differential Die-Away SystemC1500 Test Method for Nondestructive Assay of Plutonium1This practice is under the jurisdiction of ASTM Committee C26 on NuclearFuel Cycle an
14、d is the direct responsibility of Subcommittee C26.10 on NonDestructive Assay.Current edition approved June 1,2010.Published July 2010.Originally approvedin 1991.Last previous edition approved in 2003 as C1207 03.DOI:10.1520/C1207-10.2The boldface numbers in parentheses refer to the list of referenc
15、es at the end ofthis test method.3For 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.4The last approved version of thi
16、s historical standard is referenced onwww.astm.org.Copyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 by Passive Neutron Multiplicity CountingC1592 Guide for Nondestructive Assay MeasurementsC1673 Terminology of C26.10 Nondestructive Assay Meth-ods2.2 ANSI Standards:5ANSI 15.20 Guide to Calibrating Nondestructive AssaySystemsANSI 15.36 Nondestructive Assay Measurement Controland Assurance3.Terminology3.1 Refer to Terminology C1673 for de
