ASTM WK51247

    New Test Method for The Determination of Nitrogen (Total) Content in Mixed Oxide ((U, Pu)O2) Sintered Pellets, or Pu Oxide Powder by the Inert Gas Fusion Technique Followed by Thermal Conductivity Measurement

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    Developed by Subcommittee: C26.05 | Committee C26 | Contact Staff Manager


    1. Scope

    1.1This Test Method is for the determination of nitrogen content in nuclear-grade sintered mixed oxide (MOX) fuel pellets or plutonium oxide (PuO2) powder. The method utilizes a gas diffusion apparatus that detects nitrogen released by heating the mixed oxide pellets or PuO2 powder at a temperature greater than 1770oC. 1.2 The values stated in SI units are to be regarded as standard. Units of measurement in parentheses are included for information only. 1.3 This standard may involve hazardous material, operations, and equipment. This standard does not purport to address all of the safety concerns associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and to determine the applicability of regulatory limitations prior to use.


    plutonium oxide; uranium oxide; mixed oxide; MOX; nitrogen content; impurity content


    MOX is used as a nuclear-reactor fuel. This test method is designed to determine whether the nitrogen content of the MOX pellets or powder meet the requirements of the fuel specification or other applicable requirements. It is an alternative to the method in Test Method C698 (Nessler reagent).

    The title and scope are in draft form and are under development within this ASTM Committee.

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    Work Item Status

    Date Initiated:

    Technical Contact:
    Kattathu Mathew

    Draft Under Development