ASTM D7219-08

Standard Specification for Isotropic and Near-isotropic Nuclear Graphites

SCOPE
1.1 This specification covers the classification, processing, and properties of nuclear grade graphite billets with dimensions sufficient to meet the designer’s requirements for fuel elements, moderator or reflector blocks, in a high temperature gas cooled reactor. The graphite classes specified here would be suitable for reactor core applications where neutron irradiation induced dimensional changes are a significant design consideration.
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. (See IEEE/ASTM SI 10.)
1.3 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.

General Information

• Status: Historical
• Publication Date: 30-Apr-2008
• ICS: 27.120.30 - Fissile materials and nuclear fuel technology
• Technical Committee: D02 - Petroleum Products, Liquid Fuels, and Lubricants
• Drafting Committee: D02.F0 - Manufactured Carbon and Graphite Products

Relations

• Replaces: ASTM D7219-05 - Standard Specification for Isotropic and Near-isotropic Nuclear Graphites
• Effective Date: 01-May-2008
• Replaced By: ASTM D7219-08(2014) - Standard Specification for Isotropic and Near-isotropic Nuclear Graphites
• Effective Date: 01-May-2014
• Referred By: ASTM D8093-19 - Standard Guide for Nondestructive Evaluation of Nuclear Grade Graphite
• Effective Date: 01-May-2008
• Referred By: ASTM D7301-21 - Standard Specification for Nuclear Graphite Suitable for Components Subjected to Low Neutron Irradiation Dose
• Effective Date: 01-May-2008
• Referred By: ASTM C1783-15 - Standard Guide for Development of Specifications for Fiber Reinforced Carbon-Carbon Composite Structures for Nuclear Applications
• Effective Date: 01-May-2008
• Referred By: ASTM C781-20 - Standard Practice for Testing Graphite Materials for Gas-Cooled Nuclear Reactor Components
• Effective Date: 01-May-2008
• Referred By: ASTM D8075-16(2021) - Standard Guide for Categorization of Microstructural and Microtextural Features Observed in Optical Micrographs of Graphite
• Effective Date: 01-May-2008
• Referred By: ASTM C1793-15 - Standard Guide for Development of Specifications for Fiber Reinforced Silicon Carbide-Silicon Carbide Composite Structures for Nuclear Applications
• Effective Date: 01-May-2008

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information
Designation:D7219 −08 AnAmerican National Standard
Standard Specification for
1
Isotropic and Near-isotropic Nuclear Graphites
This standard is issued under the fixed designation D7219; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope D2638Test Method for Real Density of Calcined Petroleum
Coke by Helium Pycnometer
1.1 This specification covers the classification, processing,
IEEE/ASTM SI 10American National Standard for Use of
and properties of nuclear grade graphite billets with dimen-
theInternationalSystemofUnits(SI):TheModernMetric
sions sufficient to meet the designer’s requirements for fuel
System
elements, moderator or reflector blocks, in a high temperature
gas cooled reactor. The graphite classes specified here would 2.2 ASME Standard:
NQA-1 Quality Assurance Program Requirements for
be suitable for reactor core applications where neutron irradia-
3
tion induced dimensional changes are a significant design Nuclear Facilities
consideration.
3. Terminology
1.2 The values stated in SI units are to be regarded as
3.1 Definitions—Definitionsrelatingtothisspecificationare
standard. No other units of measurement are included in this
standard. (See IEEE/ASTM SI 10.) given in Terminology C709.
1.3 This standard does not purport to address all of the 3.2 Definitions of Terms Specific to This Standard:
safety concerns, if any, associated with its use. It is the
3.2.1 baking/re-baking charge—number of billets in a
responsibility of the user of this standard to establish appro- baking/re-baking furnace run.
priate safety and health practices and determine the applica-
3.2.2 bulk density—mass of a unit volume of material
bility of regulatory limitations prior to use.
including both permeable and impermeable voids.
3.2.3 extrusion forming lot—number of billets of the same
2. Referenced Documents
size extruded in an uninterrupted sequence.
2
2.1 ASTM Standards:
3.2.4 green batch—massofcoke,recyclegreenmix,recycle
C559Test Method for Bulk Density by Physical Measure-
graphite, and pitch that is required to produce a forming lot.
ments of Manufactured Carbon and Graphite Articles
3.2.5 green mix—percentage of mix formulation, pitch and
C709Terminology Relating to Manufactured Carbon and
additives required for the forming lot, which is processed and
Graphite
ready to be formed.
C781Practice for Testing Graphite and Boronated Graphite
Materials for High-Temperature Gas-Cooled Nuclear Re-
3.2.6 graphite billet—extruded, molded, or iso-molded
actor Components graphite artifact with dimensions sufficient to meet the design-
C838Test Method for Bulk Density of As-Manufactured
er’s requirements for reactor components.
Carbon and Graphite Shapes
3.2.7 graphite grade—designation given to a material by a
C1233Practice for Determining Equivalent Boron Contents
manufacturer such that it is always reproduced to the same
of Nuclear Materials
specification and from the same raw materials and mix
D346 Practice for Collection and Preparation of Coke
formulation.
Samples for Laboratory Analysis
3.2.8 graphitization charge—number of billets of the same
grade in a graphitizing furnace run.
3.2.9 graphitizing furnace run—total number of billets
1
This specification is under the jurisdiction of ASTM Committee D02 on
Petroleum Products and Lubricants and is the direct responsibility of Subcommittee graphitized together in one graphitization furnace.
D02.F0 on Manufactured Carbon and Graphite Products.
3.2.10 high purity nuclear graphite—nuclear graphite with
CurrenteditionapprovedMay1,2008.PublishedJuly2008.Originallyapproved
an Equivalent Boron Content less than 2 ppm.
in 2005. Last previous edition approved in 2005 as D7219-05. DOI: 10.1520/
D7219-08.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
3
Standards volume information, refer to the standard’s Document Summary page on Available from American Society of Mechanical Engineers (ASME), ASME
the ASTM website. International Headquarters, Three Park Ave., New York, NY 10016-5990.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1

---------------------- Page: 1 ----------------------
D7219−08
TABLE 1 ASTM Standard Classes of Nuclear Graphite
Purity
B C
A CTE Isotropy Ratio Bulk Density,
Class B D Class Designation
3
Ash Content, Boron Equivalent,
(α /α ) g/cm (min)
AG WG
ppm (max) ppm (max)
Isomolded, isotropic—High Purity 1.0-1.1 300 2 1.7 IIHP
Isomolded, isotropic—Low Purity 1.0-1.1 1000 10 1.7 IILP
Isomolded, ne
...

This document is not anASTM standard and is intended only to provide the user of anASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
An American National Standard
Designation:D7219–05 Designation: D 7219 – 08
Standard Specification for
1
Isotropic and Near-isotropic Nuclear Graphites
This standard is issued under the fixed designation D 7219; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (´) indicates an editorial change since the last revision or reapproval.
1. Scope
1.1 This specification covers the classification, processing, and properties of nuclear grade graphite billets with dimensions
sufficient to meet the designer’s requirements for fuel elements, moderator or reflector blocks, in a high temperature gas cooled
reactor. The graphite classes specified here would be suitable for reactor core applications where neutron irradiation induced
dimensional changes are a significant design consideration.
1.2
1.2 The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard.
(See IEEE/ASTM SI 10.)
1.3 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
2
2.1 ASTM Standards: ASTM Standards:
C 559 Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles
C 709 Terminology Relating to Manufactured Carbon and Graphite
C 781 Practice for Testing Graphite and Boronated Graphite Components for High-Temperature Gas-Cooled Nuclear Reactors
C 838 Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes
C 1233 Practice for Determining Equivalent Boron Contents of Nuclear Materials
D 346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
D 2638Test Method for Real Density of Calcined Petroleum Coke by Helium Pycnometer Test Method for Real Density of
Calcined Petroleum Coke by Helium Pycnometer
IEEE/ASTM SI 10 American National Standard for Use of the International System of Units (SI): The Modern Metric System
2.2 ASME Standard:
3
NQA-1 Quality Assurance Program Requirements for Nuclear Facilities
3. Terminology
3.1 Definitions—Definitions relating to this specification are given in Terminology C 709.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 apparent porosity—ratio of the volume of open pores to the exterior volume expressed as a percentage.
3.2.2baking/re-baking charge—the number —number of billets in a baking/re-baking furnace run.
3.2.33.2.2 bulk density—the mass —mass of a unit volume of material including both permeable and impermeable voids.
3.2.43.2.3 extrusion forming lot—the number —number of billets of the same size extruded in an uninterrupted sequence.
3.2.53.2.4 green batch—the mass of coke, recycle green mix, recycle graphite, and pitch that is required to produce a forming
lot. —mass of coke, recycle green mix, recycle graphite, and pitch that is required to produce a forming lot.
3.2.5 green mix—percentage of mix formulation, pitch and additives required for the forming lot, which is processed and ready
to be formed.
3.2.6 graphite billet—an extruded,—extruded, molded, or iso-molded graphite artifact with dimensions sufficient to meet the
designer’s requirements for reactor components.
1
This specification is under the jurisdiction ofASTM Committee D02 on Petroleum Products and Lubricants and is the direct responsibility of Subcommittee D02.F0 on
Manufactured Carbon and Graphite Products.
Current edition approved Nov. 1, 2005. Published December 2005.
Current edition approved May 1, 2008. Published July 2008. Originally approved in 2005. Last previous edition approved in 2005 as D 7219-05.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at [e-mail]. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
3
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Three Park Ave., New York, NY 10016-5990.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1

---------------------- Page: 1 ----------------------
D7219–08
3.2.7 graphite grade—the designation—designation given to a material by a man
...