ASTM C781 - 08(2014)

    Standard Practice for Testing Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor Components

    Active Standard ASTM C781 | Developed by Subcommittee: D02.F0

    Book of Standards Volume: 05.05


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    Significance and Use

    4.1 Property data obtained with the recommended test methods identified herein may be used for research and development, design, manufacturing control, specifications, performance evaluation, and regulatory statutes pertaining to high temperature gas-cooled reactors.

    4.2 The test methods are applicable primarily to specimens in the non-irradiated and non-oxidized state. Many are also applicable to specimens in the irradiated or oxidized state, or both, provided the specimens meet all requirements of the test method. The user is cautioned to consider the instructions given in the test methods.

    4.3 Additional test methods are in preparation and will be incorporated. The user is cautioned to employ the latest revision.

    1. Scope

    1.1 This practice covers the test methods for measuring the properties of graphite and boronated graphite materials. These properties may be used for the design and evaluation of high-temperature gas-cooled reactor components.

    1.2 The test methods referenced herein are applicable to materials used for replaceable and permanent components as defined in Section 7 and Section 9, and includes fuel elements; removable reflector elements and blocks; permanent side reflector elements and blocks; core support pedestals and elements; control rod, reserve shutdown, and burnable poison compacts; and neutron shield material.

    1.3 This practice includes test methods that have been selected from existing ASTM standards, ASTM standards that have been modified, and new ASTM standards that are specific to the testing of materials listed in 1.2. Comments on individual test methods for graphite and boronated graphite components are given in Sections 8 and 10, respectively. The test methods are summarized in Tables 1 and 2.

    1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses are for information only.

    1.5 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

    C559 Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles

    C561 Test Method for Ash in a Graphite Sample

    C577 Test Method for Permeability of Refractories

    C611 Test Method for Electrical Resistivity of Manufactured Carbon and Graphite Articles at Room Temperature

    C625 Practice for Reporting Irradiation Results on Graphite

    C651 Test Method for Flexural Strength of Manufactured Carbon and Graphite Articles Using Four-Point Loading at Room Temperature

    C695 Test Method for Compressive Strength of Carbon and Graphite

    C709 Terminology Relating to Manufactured Carbon and Graphite

    C747 Test Method for Moduli of Elasticity and Fundamental Frequencies of Carbon and Graphite Materials by Sonic Resonance

    C749 Test Method for Tensile Stress-Strain of Carbon and Graphite

    C769 Test Method for Sonic Velocity in Manufactured Carbon and Graphite Materials for Use in Obtaining Youngs Modulus

    C816 Test Method for Sulfur in Graphite by Combustion-Iodometric Titration Method

    C838 Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes

    C1039 Test Methods for Apparent Porosity, Apparent Specific Gravity, and Bulk Density of Graphite Electrodes

    C1179 Test Method for Oxidation Mass Loss of Manufactured Carbon and Graphite Materials in Air

    C1233 Practice for Determining Equivalent Boron Contents of Nuclear Materials

    C1274 Test Method for Advanced Ceramic Specific Surface Area by Physical Adsorption

    D346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis

    D1193 Specification for Reagent Water

    D2854 Test Method for Apparent Density of Activated Carbon

    D2862 Test Method for Particle Size Distribution of Granular Activated Carbon

    D3104 Test Method for Softening Point of Pitches (Mettler Softening Point Method)

    D4292 Test Method for Determination of Vibrated Bulk Density of Calcined Petroleum Coke

    D5600 Test Method for Trace Metals in Petroleum Coke by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)

    D7219 Specification for Isotropic and Near-isotropic Nuclear Graphites

    E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves

    E132 Test Method for Poissons Ratio at Room Temperature

    E228 Test Method for Linear Thermal Expansion of Solid Materials With a Push-Rod Dilatometer

    E261 Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques

    E639 Test Method for Measuring Total-Radiance Temperature of Heated Surfaces Using a Radiation Pyrometer

    E1461 Test Method for Thermal Diffusivity by the Flash Method


    ICS Code

    ICS Number Code 27.120.10 (Reactor engineering)

    UNSPSC Code

    UNSPSC Code 11101507(Graphite)


    Referencing This Standard

    DOI: 10.1520/C0781-08R14

    ASTM International is a member of CrossRef.

    Citation Format

    ASTM C781-08(2014), Standard Practice for Testing Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor Components, ASTM International, West Conshohocken, PA, 2014, www.astm.org

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