ASTM C791 - 12

    Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide

    Active Standard ASTM C791 | Developed by Subcommittee: C26.03

    Book of Standards Volume: 12.01


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    Significance and Use

    Boron carbide is used as a control material in nuclear reactors. In order to be suitable for this purpose, the material must meet certain criteria for assay, isotopic composition, and impurity content. These methods are designed to show whether or not a given material meets the specifications for these items as described in Specifications C750 and C751.

    An assay is performed to determine whether the material has the specified boron content.

    Determination of the isotopic content of the boron is made to establish whether the content is in compliance with the purchasers specifications.

    Impurity content is determined to ensure that the maximum concentration limit of certain impurity elements is not exceeded.

    1. Scope

    1.1 These test methods cover procedures for the chemical, mass spectrometric, and spectrochemical analysis of nuclear-grade boron carbide powder and pellets to determine compliance with specifications.

    1.2 The analytical procedures appear in the following order:

    Sections
    Total Carbon by Combustion in an Inductive Furnace and Infrared Measurement 7-16
    Total Boron by Titrimetry and ICP OES17-27
    Isotopic Composition by Mass Spectrometry28-32
    Pyrohydrolysis33-40
    Chloride by Constant-Current Coulometry41-49
    Chloride and Fluoride by Ion-Selective Electrode50-58
    Water by Constant-Voltage Coulometry and Weight Loss on Drying59-62
    Metallic Impurities63 and 64
    Soluble Boron by Titrimetry and ICP OES65-79
    Free Carbon by a Coulometric Method80-89


    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

    C750 Specification for Nuclear-Grade Boron Carbide Powder

    C751 Specification for Nuclear-Grade Boron Carbide Pellets

    D1193 Specification for Reagent Water


    ICS Code

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

    UNSPSC Code

    UNSPSC Code 26142100(Nuclear reactor equipment)


    DOI: 10.1520/C0791-12

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