If you are an ASTM Compass Subscriber and this document is part of your subscription, you can access it for free at ASTM Compass
    ASTM C791 - 19

    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

      Format Pages Price  
    PDF 28 $78.00   ADD TO CART
    Hardcopy (shipping and handling) 28 $78.00   ADD TO CART
    Standard + Redline PDF Bundle 56 $92.00   ADD TO CART

    Significance and Use

    4.1 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.

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

    4.1.2 Determination of the isotopic content of the boron and the free carbon content is made to establish whether the content is in compliance with the purchaser’s specifications.

    4.1.3 Impurity content is determined to ensure that the maximum concentration limit of certain impurities (chloride, fluoride, water, metallic impurities, soluble boron) 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 values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.

    1.3 The analytical procedures appear in the following order:



    Total Carbon by Combustion in an Inductive Furnace and
        Infrared Measurement

    8 – 17

    Total Boron by Titrimetry and ICP OES

    18 – 28

    Isotopic Composition by Mass Spectrometry

    29 – 33


    34 – 41

    Chloride by Constant-Current Coulometry

    42 – 50

    Chloride and Fluoride by Ion-Selective Electrode

    51 – 59

    Water by Constant-Voltage Coulometry and Weight Loss on

    60 – 63

    Metallic Impurities by DCArc OES and wet chemical methods

    64 and 65

    Soluble Boron by Titrimetry and ICP OES

    66 – 80

    Free Carbon by a Coulometric Method

    81 – 90

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

    1.5 This 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.

    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

    C859 Terminology Relating to Nuclear Materials

    C1128 Guide for Preparation of Working Reference Materials for Use in Analysis of Nuclear Fuel Cycle Materials

    D1193 Specification for Reagent Water

    E969 Specification for Glass Volumetric (Transfer) Pipets

    ICS Code

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

    UNSPSC Code

    UNSPSC Code 26142100(Nuclear reactor equipment)

    Referencing This Standard
    Link Here
    Link to Active (This link will always route to the current Active version of the standard.)

    DOI: 10.1520/C0791-19

    Citation Format

    ASTM C791-19, Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide, ASTM International, West Conshohocken, PA, 2019, www.astm.org

    Back to Top