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ASTM International - ASTM C781-08

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

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Organization: ASTM International
Publication Date: 1 September 2008
Status: inactive
Page Count: 10
ICS Code (Reactor engineering): 27.120.10
significance And Use:

Property data obtained with the recommended test methods identified herein may be used for research and development, design, manufacturing control, specifications, performance evaluation, and... View More

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.

TABLE 1 Summary of Test Methods for Graphite Components

Note-Designations under preparation will be added when approved.

Fuel, Removable Reflector,
and Core Support Elements;
Pebble Bed Reflector,
Key and Sleeves;
and Dowel Pins
Permanent Side
Reflector Elements
and Dowel Pins
Core Support Pedestals
and Dowels
Fabrication
As Manufactured Bulk Density

C838

C838

C838

Mechanical Properties
Compressive Strength

C695

C695

C695

Tensile Properties

C749A

C749A

C749A

Poisson's Ratio

E132B

E132B

E132B

Flexural Strength

C651A

C651A

C651A

Fracture Toughness

B

B

B

Modulus of Elasticity

C747

C747

C747

Physical Properties
Bulk Density-Machined Specimens

C559

C559

C559

Surface Area (BET)

C1274

C1274

C1274

Permeability

C577A,B

C577A,B

C577A,B

Apparent Porosity

C1039

C1039

C1039

Spectroscopic Analysis

B

B

B

Electrical Resistivity

C611

C611

C611

Thermal Properties
Linear Thermal Expansion

E228A

Thermal Conductivity

E1461A

E1461A

E1461A

Chemical Properties
Oxidative Mass Loss

C1179B

C1179B

C1179B

Sulfur Concentration

C816

C816

C816

Ash Content

C561A

C561A

C561A

Equivalent Boron Content

C1233A

C1233A

C

A Modification of this test method is required. See Section 8 for details.

B New test methods are required. See Section 8 for details.

C There is no identified need for determining this property.

TABLE 2 Summary of Test Methods for Boronated Graphite Components

Note-Designations under preparation will be added when approved.

CompactsNeutron
Shield
Material
Control
Rod
Burnable
Poison
Reserve
Shutdown
Bulk Density

C838

C838

C838

D4292

Linear Thermal Expansion

A

E228A

E228A

B

Particle Size

C

C

C

D2862

Mechanical Strength:
Compressive Strength

C695A

C695A

C695A

B

Impact Performance

B

B

B

C

Chemical Properties:
Sulfur Concentration

C

C

C

C

Hafnium Concentration

C

C

C

C

Relative Oxidation Rate

C

C

C

C

Boron Analysis:
Total Boron

C

C

C

C

Boron as Oxide

C

C

C

C

B

4C Particle Size

D2862D

D2862D

D2862D

D2862D

A Modification of this test method is required. See Section 10 for details.

B There is no identified need for determining this property.

C New test methods are required. See Section 10 for details.

D Additional test methods are required. See Section 10 for details.

Document History

June 1, 2020
Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
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...
November 1, 2019
Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
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...
October 1, 2018
Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
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...
May 1, 2014
Standard Practice for Testing Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor Components
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...
ASTM C781-08
September 1, 2008
Standard Practice for Testing Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor Components
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...
December 10, 2002
Standard Practice for Testing Graphite and Boronated Graphite Components for High-Temperature Gas-Cooled Nuclear Reactors
1.1 This practice covers the test methods for measuring those properties of graphite and boronated graphite materials that may be used for the design and evaluation of high-temperature gas-cooled...
January 1, 1996
Standard Practice for Testing Graphite and Boronated Graphite Components for High-Temperature Gas-Cooled Nuclear Reactors
1.1 This practice covers the test methods for measuring those properties of graphite and boronated graphite materials that may be used for the design and evaluation of high-temperature gas-cooled...
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