1.1 本规范涵盖六氟化铀（UF 6. )用于向浓缩工厂进料。包括超滤的规范 6. 来自未经辐照的天然铀和超滤 6. 从经过再处理并转化为超滤的辐照铀中提取 6. 用于浓缩和后续再利用。本规范的目标有两个:( 1. )确定商业天然铀的杂质和铀同位素限值 6. 原料，以及( 2. )定义再处理超滤的附加限制 6. （或任何再加工UF的混合物） 6. 和商用天然超滤 6. ). 对于此类UF 6. ，可能需要特殊规定，以确保不会对劳动力、工艺设备或环境产生额外危险。 1.2 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超滤 6. （例如，见TID-7016、DP-532、ORNL-NUREG-CSD-6和DOE O 474.1）。 1.3 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。 1.4 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 hexafluoride (UF 6 ) intended for feeding to an enrichment plant. Included are specifications for UF 6 derived from unirradiated natural uranium and UF 6 derived from irradiated uranium that has been reprocessed and converted to UF 6 for enrichment and subsequent reuse. The objectives of this specification are twofold: ( 1 ) to define the impurity and uranium isotope limits for Commercial Natural UF 6 feedstock, and ( 2 ) to define additional limits for Reprocessed UF 6 (or any mixture of Reprocessed UF 6 and Commercial Natural UF 6 ). For such UF 6 , special provisions may be needed to ensure that no extra hazard arises to the work force, process equipment, or the environment. 1.2 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 international, federal, state, and local regulations for processing, shipping, or in any other way using UF 6 (for example, see TID-7016, DP-532, ORNL-NUREG-CSD-6, and DOE O 474.1). 1.3 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. 1.4 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.