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    ASTM C1168 - 08

    Standard Practice for Preparation and Dissolution of Plutonium Materials for Analysis

    Active Standard ASTM C1168 | Developed by Subcommittee: C26.05

    Book of Standards Volume: 12.01

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    Significance and Use

    The materials covered are plutonium metal, plutonium oxide, and uranium-plutonium mixed oxide, including those that must meet ASTM product specifications.

    Plutonium and uranium mixtures are used as nuclear reactor fuels. For use as a nuclear reactor fuel, the material must meet certain criteria for combined uranium and pluto-
    nium content, effective fissile content, and impurity content as described in Specifications C 757, C 833, and C 1008. The material is assayed for plutonium and uranium to determine if the content is correct as specified by the purchaser.

    The materials not covered are unique plutonium materials, including alloys, compounds, and scrap materials. The user must determine the applicability of this practice to these other materials. In general, these unique plutonium materials are dissolved with various acid mixtures or by fusion with various fluxes. Many plutonium salts are soluble in hydrochloric acid.

    1. Scope

    1.1 This practice is a compilation of dissolution techniques for plutonium materials that are applicable to the test methods used for characterizing these materials. Dissolution treatments for the major plutonium materials assayed for plutonium or analyzed for other components are listed. Aliquants of the dissolved samples are dispensed on a weight basis when one of the analyses must be highly reliable, such as plutonium assay; otherwise they are dispensed on a volume basis.

    1.2 The treatments, in order of presentation, are as follows:

    Procedure TitleSection
    Dissolution of Plutonium Metal with Hydrochloric Acid9.1
    Dissolution of Plutonium Metal with Sulfuric Acid9.2
    Dissolution of Plutonium Oxide and Uranium-Plutonium Mixed
    Oxide by the Sealed-Reflux Technique
    Dissolution of Plutonium Oxide and Uranium-Plutonium Mixed
    Oxides by Sodium Bisulfate Fusion
    Dissolution of Uranium-Plutonium Mixed Oxides and Low-Fired
    Plutonium Oxide in Beakers

    1.3 The values stated in SI units are to be regarded as standard.

    1.4 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.

    2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

    ASTM Standards

    C757 Specification for Nuclear-Grade Plutonium Dioxide Powder, Sinterable

    C833 Specification for Sintered (Uranium-Plutonium) Dioxide Pellets

    C859 Terminology Relating to Nuclear Materials

    C1008 Specification for Sintered (Uranium-Plutonium) Dioxide Pellets--Fast Reactor Fuel

    ICS Code

    ICS Number Code 27.120.30 (Fissile materials and nuclear fuel technology)

    UNSPSC Code

    UNSPSC Code 12141735(Plutonium Pu)

    Referencing This Standard

    DOI: 10.1520/C1168-08

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM C1168-08, Standard Practice for Preparation and Dissolution of Plutonium Materials for Analysis, ASTM International, West Conshohocken, PA, 2008,

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