ASTM C1344-97(2013)

5.1 Uranium hexafluoride is a basic material used to prepare nuclear reactor fuel. To be suitable for this purpose, the material must meet the criteria for isotopic composition. This test method is designed to determine whether the material meets the requirements described in Specifications C787 and C996.

5.2 ASTM Committee C-26 Safeguards Statement:

1.1 This test method covers the isotopic analysis of uranium hexafluoride (UF₆) and may be used for the entire range of ²³⁵U isotopic compositions for which standards are available.

1.2 This test method is applicable to the determination of the isotopic relationship between two UF_{1.3 The sensitivity with which differences between two materials can be detected depends on the measuring system used, but ratio-measuring devices can generally read ratio-of-mol ratio differences as small as 0.0001.}

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 and health practices and determine the applicability of regulatory limitations prior to use.