Designation: C1030 − 26Standard Test Method forDetermination of Plutonium Isotopic Composition byGamma-Ray Spectrometry 1This standard is issued under the f i xed designation C1030; 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 This test method is applicable to the determination ofisotopic abundances in isotopically homogeneous plutonium-bearing materials. This test method may be applicable to otherplutonium-bearing materials, some of which may requiremodif i cations to the described test method.1.2 The procedure is applicable to items containing pluto-nium masses ranging from a few tens of milligrams up to themaximum plutonium mass allowed by criticality limits.1.3 Measurable gamma ray emissions from plutonium coverthe energy range from approximately 30 keV to above800 keV. K-X-ray emissions from plutonium and its daughtersare found in the region around 100 keV. This test method hasbeen applied to all portions of this broad spectrum of emis-sions.1.4 The isotopic abundance of the242 Pu isotope is notdirectly determined because it has no useful gamma-raysignature. Isotopic correlation techniques may be used toestimate its relative abundance Refs (1) and (2). 21.5 This test method has been demonstrated in routine usefor isotopic abundances ranging from 99 % to <50 %239 Pu.This test method has also been employed for isotopic abun-dances outside this range.1.6 The values stated in SI units and the non-SI unit ofkiloelectronvolt are to be regarded as standard. No other unitsof measurement are included in this standard.1.7 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, health, and environmental practices and deter-mine the applicability of regulatory limitations prior to use.1.8 This international standard was developed in accor-dance with internationally recognized principles on standard-ization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recom-mendations issued by the World Trade Organization TechnicalBarriers to Trade (TBT) Committee.2. Referenced Documents2.1 ASTM Standards: 3C697 Test Methods for Chemical, Mass Spectrometric, andSpectrochemical Analysis of Nuclear-Grade PlutoniumDioxide Powders and PelletsC698 Test Methods for Chemical, Mass Spectrometric, andSpectrochemical Analysis of Nuclear-Grade Mixed Ox-ides ((U, Pu)O 2 )C982 Guide for Selecting Components for Energy-Dispersive X-Ray Fluorescence (XRF) Systems (With-drawn 2008) 4C1207 Test Method for Nondestructive Assay of Plutoniumin Scrap and Waste by Passive Neutron CoincidenceCountingC1316 Test Method for Nondestructive Assay of NuclearMaterial in Scrap and Waste by Passive-Active NeutronCounting Using252 Cf Shuffler (Withdrawn 2026) 4C1458 Test Method for Nondestructive Assay of Plutonium,Tritium and241 Am by Calorimetric AssayC1493 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 Plutoniumby Passive Neutron Multiplicity Counting (Withdrawn2026) 4E181 Guide for Detector Calibration and Analysis of Radio-nuclides in Radiation Metrology for Reactor DosimetryE267 Test Method for Uranium and Plutonium Concentra-tions and Isotopic Abundances1 This test method is under the jurisdiction ofASTM Committee C26 on NuclearFuel Cycle and is the direct responsibility of Subcommittee C26.10 on NonDestructive Assay.Current edition approved June 1, 2026. Published August 2026. Originallyapproved in 1984. Last previous edition approved in 2018 as C1030 – 10 (2018).DOI: 10.1520/C1030-26.2 The boldface numbers in parentheses refer to the list of references at the end ofthis standard.3 For referenced ASTM standards, visit the ASTM website, www.astm.org, orcontact ASTM Customer Service at www.astm.org/contact. For Annual Book ofASTM Standards volume information, refer to the standard’s Document Summarypage on the ASTM website.4 The last approved version of this historical standard is referenced onwww.astm.org.Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United StatesThis international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for theDevelopment of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.1
