ASTM C781-20
Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components

Standard No.

ASTM C781-20

Release Date

2020

Published By

American Society for Testing and Materials (ASTM)

Latest

ASTM C781-20

Scope

1.1 This practice covers the application and limitations of test methods for measuring the properties of graphite materials. These properties may be used for the design and evaluation of 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 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. Specific aspects with respect to testing of irradiated materials are addressed. 1.3 This practice includes test methods that have been selected from ASTM standards and guides that are specific to the testing of materials listed in 1.2. Comments on individual test methods for graphite components are given in Section 8. The test methods are summarized in Table 1. 1.4 The values stated in SI units are to be regarded as standard. The values given in parentheses after SI units are provided for information only and are not considered standard. 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.6 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.

ASTM C781-20 Referenced Document

• ASTM C1039 Standard Test Methods for Apparent Porosity, Apparent Specific Gravity, and Bulk Density of Graphite Electrodes*， 2020-12-01 Update
• ASTM C1179 Standard Test Method for Oxidation Mass Loss of Manufactured Carbon and Graphite Materials in Air
• ASTM C1233 Standard Practice for Determining Equivalent Boron Contents of Nuclear Materials
• ASTM C1274 Standard Test Method for Advanced Ceramic Specific Surface Area by Physical Adsorption
• ASTM C559 Standard Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles
• ASTM C577 Standard Test Method for Permeability of Refractories
• ASTM C611 Standard Test Method for Electrical Resistivity of Manufactured Carbon and Graphite Articles at Room Temperature
• ASTM C625 Standard Practice for Reporting Irradiation Results on Graphite
• ASTM C651 Standard Test Method for Flexural Strength of Manufactured Carbon and Graphite Articles Using Four-Point Loading at Room Temperature
• ASTM C695 Standard Test Method for Compressive Strength of Carbon and Graphite
• ASTM C747 Standard Test Method for Moduli of Elasticity and Fundamental Frequencies of Carbon and Graphite Materials by Sonic Resonance
• ASTM C749 Standard Test Method for Tensile Stress-Strain of Carbon and Graphite
• ASTM C769 Standard Test Method for Sonic Velocity in Manufactured Carbon and Graphite Materials for Use in Obtaining an Approximate Young''s Modulus
• ASTM C816 Standard Test Method for Sulfur in Graphite by Combustion-Iodometric Titration Method
• ASTM C838 Standard Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes
• ASTM D1193 Standard Specification for Reagent Water
• ASTM D2854 Standard Test Method for Apparent Density of Activated Carbon
• ASTM D2862 Standard Test Method for Particle Size Distribution of Granular Activated Carbon
• ASTM D3104 Standard Test Method for Softening Point of Pitches (Mettler Softening Point Method)
• ASTM D346 Standard Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
• ASTM D4175 Standard Terminology Relating to Petroleum Products, Liquid Fuels, and Lubricants*， 2023-07-01 Update
• ASTM D4292 Standard Test Method for Determination of Vibrated Bulk Density of Calcined Petroleum Coke
• ASTM D5600 Standard Test Method for Trace Metals in Petroleum Coke by Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES)
• ASTM D7219 Standard Specification for Isotropic and Near-isotropic Nuclear Graphites
• ASTM D7542 Standard Test Method for Air Oxidation of Carbon and Graphite in the Kinetic Regime*， 2021-11-01 Update
• ASTM D7775 Standard Guide for Measurements on Small Graphite Specimens*， 2021-11-01 Update
• ASTM D7779 Standard Test Method for Determination of Fracture Toughness of Graphite at Ambient Temperature*， 2020-10-01 Update
• ASTM D7846 Standard Practice for Reporting Uniaxial Strength Data and Estimating Weibull Distribution Parameters for Advanced Graphites*， 2021-12-01 Update
• ASTM D7972 Standard Test Method for Flexural Strength of Manufactured Carbon and Graphite Articles Using Three-Point Loading at Room Temperature
• ASTM D8186 Standard Test Method for Measurement of Impurities in Graphite by Electrothermal Vaporization Inductively Coupled Plasma Optical Emission Spectrometry (ETV-ICP OES)
• ASTM E11 Standard Specification for Wire Cloth and Sieves for Testing Purposes
• ASTM E1269 Standard Test Method for Determining Specific Heat Capacity by Differential Scanning Calorimetry
• ASTM E132 Standard Test Method for Poisson''s Ratio at Room Temperature
• ASTM E1461 Standard Test Method for Thermal Diffusivity of Solids by the Flash Method
• ASTM E228 Standard Test Method for Linear Thermal Expansion of Solid Materials With a Vitreous Silica Dilatometer
• ASTM E261 Standard Practice for Determining Neutron Fluence, Fluence Rate, and Spectra by Radioactivation Techniques
• ASTM E2716 Standard Test Method for Determining Specific Heat Capacity by Modulated Temperature Differential Scanning Calorimetry*， 2023-01-01 Update
• ASTM E639 Standard Test Method for Measuring Total-Radiance Temperature of Heated Surfaces Using a Radiation Pyrometer

ASTM C781-20 history

• 2020 ASTM C781-20 Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
• 2019 ASTM C781-19 Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
• 2018 ASTM C781-18 Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
• 2008 ASTM C781-08(2014) Standard Practice for Testing Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor Components
• 2008 ASTM C781-08 Standard Practice for Testing Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor Components
• 2002 ASTM C781-02 Standard Practice for Testing Graphite and Boronated Graphite Components for High-Temperature Gas-Cooled Nuclear Reactors
• 1996 ASTM C781-96 Standard Practice for Testing Graphite and Boronated Graphite Components for High-Temperature Gas-Cooled Nuclear Reactors