ASTM D7219-08(2014)
(Specification)Standard Specification for Isotropic and Near-isotropic Nuclear Graphites
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.
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Designation:D7219 −08 (Reapproved 2014) An American 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, Liquid Fuels, and Lubricants and is the direct responsibility of graphitized together in one graphitization furnace.
Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
3.2.10 high purity nuclear graphite—nuclear graphite with
CurrenteditionapprovedMay1,2014.PublishedJuly2014.Originallyapproved
an Equivalent Boron Content less than 2 ppm.
in 2005. Last previous edition approved in 2008 as D7219–08. DOI: 10.1520/
D7219-08R14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
contact ASTM Customer Service at service@astm.org. 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 (2014)
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 P
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM 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.
Designation: D7219 − 08 D7219 − 08 (Reapproved 2014) An American 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. 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 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:
C559 Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles
C709 Terminology Relating to Manufactured Carbon and Graphite
C781 Practice for Testing Graphite and Boronated Graphite Materials for High-Temperature Gas-Cooled Nuclear Reactor
Components
C838 Test Method for Bulk Density of As-Manufactured Carbon and Graphite Shapes
C1233 Practice for Determining Equivalent Boron Contents of Nuclear Materials
D346 Practice for Collection and Preparation of Coke Samples for Laboratory Analysis
D2638 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 C709.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 baking/re-baking charge—number of billets in a baking/re-baking furnace run.
3.2.2 bulk density—mass of a unit volume of material including both permeable and impermeable voids.
3.2.3 extrusion forming lot—number of billets of the same size extruded in an uninterrupted sequence.
3.2.4 green batch—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.
1
This specification is under the jurisdiction of ASTM Committee D02 on Petroleum Products Products, Liquid Fuels, and Lubricants and is the direct responsibility of
Subcommittee D02.F0 on Manufactured Carbon and Graphite Products.
Current edition approved May 1, 2008May 1, 2014. Published July 2008July 2014. Originally approved in 2005. Last previous edition approved in 20052008 as
D7219D7219 – 08.-05. DOI: 10.1520/D7219-08.10.1520/D7219-08R14.
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. 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 (2014)
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, near-isotropic—High Purity 1.1-1.15 300 2 1.7 INHP
Isomolded, near-isotropic—Low Purity 1.1-1.15 1000 10 1.7 INLP
Extruded, isotropic—High Purity 1.0-1.1 300 2 1.7 EIHP
Extruded, isotropic—Low Purity 1.0-1.1 1000 10 1.7 EILP
E
...
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