1.1 这些试验方法包括烧结氧化钆二氧化铀颗粒的分析程序，以确定是否符合规范。 1.2 分析程序按以下顺序出现: 部分 直接燃烧导热法测定碳（总量） 2. C1408 用直接燃烧红外检测法测定氧化铀粉末和颗粒中碳（总量）的试验方法 3. 热水解离子选择电极法测定氯和氟 4. C1502 测定二氧化铀和氧化钆中总氯和氟的试验方法 3. 能量色散X射线光谱法测定钆含量 4. C1456 测定氧化钆中铀或钆（或两者）的试验方法- 氧化铀颗粒或X射线荧光（XRF） 3. 惰性气体熔化氢气 4. C1457 用载气萃取法测定氧化铀粉末和芯块中总氢含量的试验方法 3. 多丝表面电离质谱法测定铀同位素组成 2. C1413 用热电离质谱法对水解六氟化铀和硝酸铀酰溶液进行同位素分析的试验方法 3. C1347 分析用铀材料的制备和溶解实施规程 3. 蒸馏-纳氏试剂（光度法）法测定氮 7. 到 17 烧结氧化钆二氧化铀芯块的氧金属比 4. C1430 测定烧结二氧化铀和钆中铀、氧铀比和氧金属比的试验方法- 大气平衡法测定二氧化铀芯块 3. 痕量杂质元素的光谱化学测定 4. C1517 用直流电弧发射光谱法测定铀金属或化合物中金属杂质的试验方法 3. 热真空抽气总气体 2. 游离钆的陶瓷学测定 2. O 3. 和自由UO 2. 估计（U，Gd）O的均匀性 2. 颗粒 18 到 25 化学蚀刻后通过线性截距测定平均晶粒尺寸的陶瓷学方法 26 到 33 1.3 以国际单位制表示的数值应视为标准。 1.4 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.5 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。 ====意义和用途====== 4.1 本方法中的测试方法旨在显示给定材料是否符合规范 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: Section Carbon (Total) by Direct Combustion—Thermal Conductivity Method 2 C1408 Test Method for Carbon (Total) in Uranium Oxide Powders and Pellets By Direct Combustion-Infrared Detection Method 3 Chlorine and Fluorine by Pyrohydrolysis Ion-Selective Electrode Method 4 C1502 Test Method for Determination of Total Chlorine and Fluorine in Uranium Dioxide and Gadolinium Oxide 3 Gadolinia Content by Energy-Dispersive X-Ray Spectrometry 4 C1456 Test Method for Determination of Uranium or Gadolinium (or both) in Gadolinium Oxide-Uranium Oxide Pellets or by X-Ray Fluorescence (XRF) 3 Hydrogen by Inert Gas Fusion 4 C1457 Test Method for Determination of Total Hydrogen Content of Uranium Oxide Powders and Pellets by Carrier Gas Extraction 3 Isotopic Uranium Composition by Multiple-Filament Surface-Ionization Mass Spectrometric Method 2 C1413 Test Method for Isotopic Analysis of Hydrolyzed Uranium Hexafluoride And Uranyl Nitrate Solutions By Thermal Ionization Mass Spectrometry 3 C1347 Practice for Preparation and Dissolution of Uranium Materials for Analysis 3 Nitrogen by Distillation—Nessler Reagent (Photometric) Method 7 to 17 Oxygen-to-Metal Ratio of Sintered Gadolinium Oxide-Uranium Dioxide Pellets 4 C1430 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 3 Spectrochemical Determination of Trace Impurity Elements 4 C1517 Test Method for Determination of Metallic Impurities in Uranium Metal or Compounds by DC-Arc Emission Spectroscopy 3 Total Gas by Hot Vacuum Extraction 2 Ceramographic Determination of Free Gd 2 O 3 and Free UO 2 to Estimate the Homogeneity of (U,Gd)O 2 Pellets 18 to 25 Ceramographic Determination of Average Grain Size by Linear Intercept after Chemical Etching 26 to 33 1.3 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. ====== Significance And Use ====== 4.1 The test methods in this method are designed to show whether a given material is in accordance with Specification C922 .