1.1 本规范涵盖了铀氧化物，包括加工副产品或废料（粉末、颗粒或碎片），其拟溶解到符合规范要求的硝酸铀酰溶液中 C788 转换为核级UO之前 2. 带有a的粉末 235 U含量小于5 %. 本规范规定了在加工成核级铀之前要溶解的此类氧化铀粉末的杂质和铀同位素限值 2. 如规范所定义 C753 . 1.2 本规范为核工业提供了此类氧化铀粉末的通用标准。它认识到了转化过程的多样性，以及这些粉末随后要经历的过程（例如，通过溶剂萃取）。 因此，预计有必要通过买方和卖方之间的协议纳入补充规范限制。 1.3 本规范的范围并不全面涵盖预防危急事故、健康和安全或装运的所有规定。遵守本规范并不免除用户遵守所有国际、国家、州和地方有关加工、运输或任何其他使用铀粉方式的法规的义务（见 2.2 和 2.3 ). 1.4 单位- 以国际单位制表示的数值应视为标准值。本标准不包括其他计量单位。 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。

1.1 This specification covers uranium oxides, including processed byproducts or scrap material (powder, pellets, or pieces), that are intended for dissolution into uranyl nitrate solution meeting the requirements of Specification C788 prior to conversion into nuclear grade UO 2 powder with a 235 U content of less than 5 %. This specification defines the impurity and uranium isotope limits for such urania powders that are to be dissolved prior to processing to nuclear grade UO 2 as defined in Specification C753 . 1.2 This specification provides the nuclear industry with a general standard for such uranium oxide powders. It recognizes the diversity of conversion processes and the processes to which such powders are subsequently to be subjected (for instance, by solvent extraction). It is therefore anticipated that it may be necessary to include supplementary specification limits by agreement between the buyer and seller. 1.3 The scope of this specification does not comprehensively cover all provisions for preventing criticality accidents, for health and safety, or for shipping. Observance of this specification does not relieve the user of the obligation to conform to all international, national, state and local regulations for processing, shipping, or any other way of using urania powders (see 2.2 and 2.3 ). 1.4 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 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.