【国外标准】 Standard Test Methods for Analysis of Sintered Gadolinium Oxide-Uranium Dioxide Pellets

4.1 The test methods in this method are designed to show whether a given material is in accordance with Specification C922.1.1 These test methods cover procedures for the analysis of sintered gadolinium oxide-uranium dioxide pellets to determine compliance with specifications.1.2 The analytical procedures appear in the following order:  SectionCarbon (Total) by Direct Combustion—Thermal Conductivity Method 2C1408 Test Method for Carbon (Total) in Uranium Oxide Powders and Pellets By Direct Combustion-Infrared Detection Method 3Chlorine and Fluorine by Pyrohydrolysis Ion-Selective Electrode Method 4C1502 Test Method for Determination of Total Chlorine and Fluorine in Uranium Dioxide and Gadolinium Oxide 3Gadolinia Content by Energy-Dispersive X-Ray Spectrometry 4C1456 Test Method for Determination of Uranium or Gadolinium (or both) in Gadolinium Oxide-Uranium Oxide Pellets or by X-Ray Fluorescence (XRF) 3Hydrogen by Inert Gas Fusion 4C1457 Test Method for Determination of Total Hydrogen Content of Uranium Oxide Powders and Pellets by Carrier Gas Extraction 3Isotopic Uranium Composition by Multiple-Filament Surface-Ionization Mass Spectrometric Method 2C1413 Test Method for Isotopic Analysis of Hydrolyzed Uranium Hexafluoride And Uranyl Nitrate Solutions By Thermal Ionization Mass Spectrometry 3C1347 Practice for Preparation and Dissolution of Uranium Materials for Analysis 3Nitrogen by Distillation—Nessler Reagent (Photometric) Method 7 to 17Oxygen-to-Metal Ratio of Sintered Gadolinium Oxide-Uranium Dioxide Pellets 4C1430 Test Method for Determination of Uranium, Oxygen to Uranium (O/U), and Oxygen to Metal (O/M) in Sintered Uranium Dioxide and Gadolinia-Uranium Dioxide Pellets by Atmospheric Equilibration 3Spectrochemical Determination of Trace Impurity Elements 4C1517 Test Method for Determination of Metallic Impurities in Uranium Metal or Compounds by DC-Arc Emission Spectroscopy 3Total Gas by Hot Vacuum Extraction 2Ceramographic Determination of Free Gd2O3 and Free UO2 to Estimate the Homogeneity of (U,Gd)O2 Pellets 18 to 25Ceramographic Determination of Average Grain Size by Linear Intercept after Chemical Etching 26 to 331.3 The values stated in SI units are to be regarded as the standard.1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use.1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.