1.1 本规范涵盖核级六氟化铀（UF 6. )通过浓缩工厂进行处理或通过将高浓缩铀与其他铀混合以获得任何类型的铀而生产的铀 235 U浓度低于5 % 这是为了制造燃料。本规范的目标有两个: (1) 确定浓缩商业级超滤膜的杂质和铀同位素限值 6. 因此，就燃料的设计和制造而言，它基本上等同于由天然超滤膜制成的浓缩铀 6. 和 (2) 定义浓缩后处理超滤的限制 6. 如果重新处理UF，则为预期值 6. 在不稀释的情况下用商用天然超滤进行浓缩 6. . 对于此类UF 6. ，可能需要特殊规定（此处未定义），以确保燃料性能并保护劳动力、工艺设备和环境。 1.2 本规范旨在为核工业提供浓缩超滤的标准 6. 用于烧结UO的生产 2. 燃料制造用粉末。除本规范外，有关各方可同意其他适当条件。 1.3 本规范的范围并不全面涵盖预防临界事故的所有规定或健康安全或运输要求。遵守本规范并不免除用户遵守所有适用的国际、联邦、州和地方法规的义务，以处理、运输或以任何其他方式使用UF 6. （例如，见TID-7016、DP-532和DOE O474.1）。 1.4 以国际单位制表示的数值应视为标准值。国际单位制后括号中给出的值仅供参考，不被视为标准值。 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 nuclear grade uranium hexafluoride (UF 6 ) that either has been processed through an enrichment plant or has been produced by the blending of Highly Enriched Uranium with other uranium to obtain uranium of any 235 U concentration below 5 % and that is intended for fuel fabrication. The objectives of this specification are twofold: (1) to define the impurity and uranium isotope limits for Enriched Commercial Grade UF 6 so that, with respect to fuel design and manufacture, it is essentially equivalent to enriched uranium made from natural UF 6 , and (2) to define limits for Enriched Reprocessed UF 6 to be expected if Reprocessed UF 6 is to be enriched without dilution with Commercial Natural UF 6 . For such UF 6 , special provisions, not defined herein, may be needed to ensure fuel performance and to protect the work force, process equipment, and the environment. 1.2 This specification is intended to provide the nuclear industry with a standard for enriched UF 6 that is to be used in the production of sinterable UO 2 powder for fuel fabrication. In addition to this specification, the parties concerned may agree to other appropriate conditions. 1.3 The scope of this specification does not comprehensively cover all provisions for preventing criticality accidents or requirements for health and safety or for shipping. Observance of this specification does not relieve the user of the obligation to conform to all applicable international, federal, state, and local regulations for processing, shipping, or in any other way using UF 6 (see, for example, TID-7016, DP-532, and DOE O474.1). 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered 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.