ASTM C 1742 : 2017 : REDLINE

1.1This is a quantitative test method applicable to determining the mass percent of uranium isotopes in uranium hexafluoride (UF₆) samples with  ²³⁵U concentrations between 0.1 and 5.0 mass %.

1.2This test method may be applicable for the entire range of  ²³⁵U concentrations for which adequate standards are available.2

1.3This test method is for analysis by a gas magnetic sector mass spectrometer with a single collector using interpolation to determine the isotopic concentration of an unknown sample between two characterized UF₆ standards.

1.4This test method is to replace the existing test method currently published in Test Methods C761 and is used in the nuclear fuel cycle for UF₆ isotopic analyses.

1.5The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.

1.6This 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.

1.7This 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.