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Standard Test Method for Determination of Total Hydrogen Content of Uranium Oxide Powders and Pellets by Carrier Gas Extraction 用载气提取法测定氧化铀粉末和颗粒中总氢含量的标准试验方法
发布日期: 2018-02-01
1.1 本试验方法适用于测定核级氧化铀粉末和芯块中的氢,以确定是否符合规范。氧化钆(Gd 2. O 3. )氧化钆、氧化铀粉末和颗粒也可使用本试验方法进行分析。 1.2 本标准描述了测量铀氧化物中总氢含量的程序。总氢含量来自吸收水、结晶水、氢碳化物和其他可能作为燃料杂质存在的氢化化合物。 1.3 本试验方法涵盖0.05至200μg残余氢的测定。 1.4 本试验方法描述了配备导热检测器的电极炉载气燃烧系统。 1.5 首选的单位制是每克样品的氢微克(μg/g样品)或每克铀的氢微克(μg/g U)。 1.6 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。 1.7 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。 有关具体的危险说明,请参阅第节 9 . 1.8 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 二氧化铀被用作核反应堆燃料。氧化钆用作二氧化铀的添加剂。为了适用于此目的,这些材料必须满足某些杂质含量标准。本试验方法旨在确定氢含量是否符合规范 C753 , C776 , C888 和 C922 .
1.1 This test method applies to the determination of hydrogen in nuclear-grade uranium oxide powders and pellets to determine compliance with specifications. Gadolinium oxide (Gd 2 O 3 ) and gadolinium oxide-uranium oxide powders and pellets may also be analyzed using this test method. 1.2 This standard describes a procedure for measuring the total hydrogen content of uranium oxides. The total hydrogen content results from absorbed water, water of crystallization, hydro-carbides and other hydrogenated compounds which may exist as fuel's impurities. 1.3 This test method covers the determination of 0.05 to 200 μg of residual hydrogen. 1.4 This test method describes an electrode furnace carrier gas combustion system equipped with a thermal conductivity detector. 1.5 The preferred system of units is micrograms hydrogen per gram of sample (μg/g sample) or micrograms hydrogen per gram of uranium (μg/g U). 1.6 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 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. For specific hazard statements, see Section 9 . 1.8 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 Uranium dioxide is used as a nuclear-reactor fuel. Gadolinium oxide is used as an additive to uranium dioxide. In order to be suitable for this purpose, these materials must meet certain criteria for impurity content. This test method is designed to determine whether the hydrogen content meets Specifications C753 , C776 , C888 , and C922 .
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归口单位: C26.05
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