【国外标准】 Standard Test Method for Determination of Loose and Tapped Bulk Densities of Small Quantities of Plutonium Oxide

5.1 This test method is intended for determination of loose or tapped bulk density or both for PuO2 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 D6393.1.1 This test method specifies a method for the determination of loose and tapped bulk density of plutonium oxide (PuO2) 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.