1.1 本规范涵盖成品烧结和研磨（U、Pu）O 2. 轻水反应堆用颗粒。它适用于（U，Pu）O 2. 钚添加量高达15的芯块 重量%（wt%，即0.15 g Pu/g（U+Pu+Am））。 1.2 根据本规范生产的颗粒有四个等级。 1.2.1 R级- 240 （Pu+Am）的Pu含量（即g 240 Pu/g（Pu+Am））至少为19%。 1.2.2 F级- 240 （Pu+Am）的Pu含量至少为7%，小于19%。 1.2.3 N1级- 240 （Pu+Am）的Pu含量小于7%。 1.2.4 N2级- 240 聚氨酯/ 239 Pu不超过0.10。 1.3 没有讨论或规定预防危急事件，也没有讨论健康和安全要求、避免危险或运输预防措施和控制。 遵守本规范并不免除用户了解并遵守与拥有、加工、运输或使用源核材料或特殊核材料有关的所有适用国际、联邦、州和地方法规的义务。美国政府文件的例子包括《联邦法规》第10篇第50部分生产和利用设施的国内许可；《联邦法规》第10篇第71部分放射性物质的包装和运输；和《联邦法规》第49篇第173部分“装运和包装的一般要求”。 1.4 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 以下安全隐患警告仅适用于技术要求部分第节 4. ，本规范: 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和健康实践，并确定监管限制的适用性。

1.1 This specification covers finished sintered and ground (U, Pu)O 2 pellets for use in light water reactors. It applies to (U, Pu)O 2 pellets containing plutonium additions up to 15 weight % (wt%; that is, 0.15 g Pu / g (U + Pu + Am)). 1.2 Pellets produced under this specification are available in four grades. 1.2.1 Grade R— 240 Pu content of (Pu + Am) (that is, g 240 Pu / g (Pu + Am)) is at least 19 %. 1.2.2 Grade F— 240 Pu content of (Pu + Am) is at least 7 % and less than 19 %. 1.2.3 Grade N1— 240 Pu content of (Pu + Am) is less than 7 %. 1.2.4 Grade N2— 240 Pu / 239 Pu does not exceed 0.10. 1.3 There is no discussion of or provision for preventing criticality incidents, nor are health and safety requirements, the avoidance of hazards, or shipping precautions and controls discussed. Observance of this specification does not relieve the user of the obligation to be aware of and conform to all applicable international, federal, state, and local regulations pertaining to possessing, processing, shipping, or using source or special nuclear material. Examples of U.S. government documents are Code of Federal Regulations Title 10, Part 50—Domestic Licensing of Production and Utilization Facilities; Code of Federal Regulations Title 10, Part 71—Packaging and Transportation of Radioactive Material; and Code of Federal Regulations Title 49, Part 173—General Requirements for Shipments and Packaging. 1.4 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.5 The following safety hazards caveat pertains only to the technical requirements portion, Section 4 , of this specification: 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 and health practices and determine the applicability of regulatory limitations prior to use.