1.1 本试验方法规定了一种测定氧化钚（PuO）松散和抽头体积密度的方法 2. )粉末。 1.2 当可用于测量的粉末数量有限时，本试验方法适用。替代试验方法，如试验方法 B527 或 D7481 ，可在足够数量时使用。 1.3 本试验方法包含解释性注释，不属于该方法强制性要求的一部分。 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 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、健康和环境实践，并确定监管限制的适用性。 第节给出了一些具体的危害说明 7. 关于危险。 1.6 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。 ====意义和用途====== 5.1 本试验方法旨在测定PuO的松散或抽头堆积密度或两者 2. 核工业中的粉末或化合物。当用于进行测量的可用材料数量因核安全或核库存实验室规模限制等原因而受到限制时，可使用该仪器。 5.2 只要进行了适当的验证，本试验方法可适用于核工业中的其他金属粉末。 5.3 应谨慎使用使用本试验方法获得的松装密度值，因为它们可能会因各种因素而发生很大变化，例如试样的初始分散状态、量筒中试样的高径比、粉末的干燥度、，以及操作员之间的变化（例如，样品倒入气缸的速度）。 5.4 抽头体积密度测试的数据可用于估计装有固定质量粉末的小型容器所需的体积。 5.5 本试验方法可用于测定试验方法中所述的卡尔压缩指数 D6393 .

1.1 This test method specifies a method for the determination of loose and tapped bulk density of plutonium oxide (PuO 2 ) powder. 1.2 This test method is applicable when limited quantities of powder are available for performance of the measurements. Alternative test methods, such as Test Methods B527 or D7481 , may be used when sufficient quantities are available. 1.3 This test method contains notes that are explanatory and are not part of the mandatory requirements of the method. 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 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. Some specific hazards statements are given in Section 7 on Hazards. 1.6 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 ====== 5.1 This test method is intended for determination of loose or tapped bulk density or both for PuO 2 powders or compounds in the nuclear industry. It is intended for use when the quantity of available material for performing the measurements is limited because of reasons such as nuclear safety or laboratory scale limits on nuclear inventory. 5.2 This test method can be applied to other metal powders in the nuclear industry provided that appropriate validation has been performed. 5.3 Values of loose bulk density obtained using this test method should be used with caution since they can vary considerably depending on factors such as the initial state of dispersion of the test specimen, height-to-diameter ratio of the specimen in the graduated cylinder, the dryness of the powder, and operator-to-operator variation (for example, the speed with which the sample is poured into the cylinder). 5.4 The data from the tapped bulk density test can be used to estimate the needed volume of small containers holding a fixed mass of powder that has been compacted. 5.5 This test method may be useful for the determination of the Carr Compressibility Index as described in Test Method D6393 .