1.1 本规程涵盖了铀材料的溶解处理，适用于用于表征铀元素、同位素和杂质测定的这些材料的试验方法。列出了主要铀材料的溶解处理方法，包括铀分析或其他成分分析。 1.2 按照呈现顺序，处理方法如下: 程序标题 部分 硝酸溶解铀金属和氧化物 8.1 硝酸和残渣溶解铀氧化物 治疗 8.2 铀铝合金在盐酸中的溶解 带残留物处理 8.3 硝酸浸出铀废料和灰分 碳酸盐熔融法酸处理残渣 8.4 难熔铀的溶解- 包含材料依据 碳酸盐熔融 8.5 铀铝合金的溶解 铀废料、灰分和耐火材料 含铀材料 微波处理 8.6 1.3 以国际单位制表示的值应视为标准值。本标准不包括其他测量单位。 1.4 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前建立适当的安全、健康和环境实践，并确定监管限制的适用性。 第节中给出了具体危害说明 7. . 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《国际标准、指南和建议制定原则决定》中确立的国际公认标准化原则制定的。 =====意义和用途====== 4.1 必须符合ASTM规范的材料包括金属铀和氧化铀。 4.2 铀材料被用作核反应堆燃料。为此，这些材料必须符合规范中所述的铀含量、铀-235丰度和杂质含量的特定标准 C753型 和 C776年 对材料进行铀分析，以确定其含量是否符合规定。 4.3 铀合金、难熔铀材料以及含铀废料和灰是独特的铀材料，用户必须确定本规程的适用性。通常，这些独特的铀材料用各种酸混合物溶解，或通过与各种熔剂的融合而溶解。

1.1 This practice covers dissolution treatments for uranium materials that are applicable to the test methods used for characterizing these materials for uranium elemental, isotopic, and impurities determinations. Dissolution treatments for the major uranium materials assayed for uranium or analyzed for other components are listed. 1.2 The treatments, in order of presentation, are as follows: Procedure Title Section Dissolution of Uranium Metal and Oxide with Nitric Acid 8.1 Dissolution of Uranium Oxides with Nitric Acid and Residue Treatment 8.2 Dissolution of Uranium-Aluminum Alloys in Hydrochloric Acid with Residue Treatment 8.3 Dissolution of Uranium Scrap and Ash by Leaching with Nitric Acid and Treatment of Residue by Carbonate Fusion 8.4 Dissolution of Refractory Uranium-Containing Material by Carbonate Fusion 8.5 Dissolution of Uranium—Aluminum Alloys Uranium Scrap and Ash, and Refractory Uranium-Containing Materials by Microwave Treatment 8.6 1.3 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this 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. Specific hazards statements are given in Section 7 . 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 materials covered that must meet ASTM specifications are uranium metal and uranium oxide. 4.2 Uranium materials are used as nuclear reactor fuel. For this use, these materials must meet certain criteria for uranium content, uranium-235 enrichment, and impurity content, as described in Specifications C753 and C776 . The material is assayed for uranium to determine whether the content is as specified. 4.3 Uranium alloys, refractory uranium materials, and uranium containing scrap and ash are unique uranium materials for which the user must determine the applicability of this practice. In general, these unique uranium materials are dissolved with various acid mixtures or by fusion with various fluxes.