ASTM C784-20
(Specification)Standard Specification for Nuclear-Grade Aluminum Oxide-Boron Carbide Composite Pellets
Standard Specification for Nuclear-Grade Aluminum Oxide-Boron Carbide Composite Pellets
ABSTRACT
This specification applies to composite pellets composed of mixtures of nuclear-grade aluminum oxide and boron carbide that may be ultimately used in a reactor core, for example, in neutron absorber rods. Specimens shall be sampled and tested as appropriate, and shall adhere accordingly to required chemical compositions, physical dimensions, density, boron carbide homogeneity, mechanical properties, visual appearance, end and circumferential chips, cracks, and fissures and other defects.
SCOPE
1.1 This specification applies to pellets composed of mixtures of aluminum oxide and boron carbide that may be ultimately used in a reactor core, for example, in neutron absorber rods.
1.2 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.
1.3 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.
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Standards Content (Sample)
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.
Designation:C784 −20
Standard Specification for
Nuclear-Grade Aluminum Oxide-Boron Carbide Composite
1
Pellets
This standard is issued under the fixed designation C784; 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.
3
1. Scope 2.2 ANSI Standard:
ANSI/ASME NQA-1 Quality Assurance Program Require-
1.1 This specification applies to pellets composed of mix-
ments for Nuclear Facilities
tures of aluminum oxide and boron carbide that may be
4
2.3 Government Standard:
ultimately used in a reactor core, for example, in neutron
10 CFR 50 Title 10, Code of Federal Regulations, Energy
absorber rods.
Part 50—Domestic Licensing of Production and Utiliza-
1.2 The values stated in SI units are to be regarded as
tion Facilities
standard. The values given in parentheses after SI units are
provided for information only and are not considered standard.
3. Terminology
1.3 This international standard was developed in accor-
3.1 Definitions:
dance with internationally recognized principles on standard-
3.1.1 Terms shall be defined in accordance with Terminol-
ization established in the Decision on Principles for the
ogy C859, except for the following:
Development of International Standards, Guides and Recom-
3.1.2 buyer—organization issuing the purchase order.
mendations issued by the World Trade Organization Technical
3.1.3 pellet—a fabricated geometric shape of aluminum
Barriers to Trade (TBT) Committee.
oxide-boron carbide having a chemical composition as de-
scribed in Section 4.
2. Referenced Documents
3.1.4 pellet lot—that quantity of pellets produced from one
2
2.1 ASTM Standards:
powder mixture lot using one set of mixing and process
C559 Test Method for Bulk Density by Physical Measure-
parameters; pellet lot size shall be agreed upon between the
ments of Manufactured Carbon and Graphite Articles
seller and the buyer.
C750 Specification for Nuclear-Grade Boron Carbide Pow-
3.1.5 powder mixture lot—a specified quantity of aluminum
der
oxideandboroncarbidemadeupofpowdersfromoneormore
C809 Test Methods for Chemical, Mass Spectrometric, and
sourcesblendedtogethersuchthatsamplestakeninaccordance
Spectrochemical Analysis of Nuclear-Grade Aluminum
with Section 7 can be considered as representative of the entire
Oxide and AluminumOxide-Boron Carbide Composite
specified quantity.
Pellets
3.1.6 seller—pellet supplier.
C859 Terminology Relating to Nuclear Materials
C1031 Specification for Nuclear-Grade Aluminum Oxide
4. Technical Requirements
Powder
E11 Specification for Woven Wire Test Sieve Cloth and Test
4.1 Major Constituents—Aluminum oxide-boron carbide
Sieves
pellets shall be fabricated using major constituents that meet
E105 Practice for Probability Sampling of Materials
the requirements of Specifications C750 and C1031.
4.2 Chemical Composition:
4.2.1 Use analytical chemistry methods in accordance with
1
This specification is under the jurisdiction of ASTM Committee C26 on
Test Methods C809 or demonstrated alternate methods agreed
Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.03 on
upon between the buyer and the seller.
Neutron Absorber Materials Specifications.
Current edition approved Jan. 1, 2020. Published February 2020. Originally
approved in 1976. Last previous edition approved in 2016 as C784 – 16. DOI:
3
10.1520/C0784-20. Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St.,
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 4th Floor, New York, NY 10036, http://www.ansi.org.
4
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Available from U.S. Government Printing Office, Superintendent of
Standards volume information, refer to the standard’s Document Summary page on Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
the ASTM website. www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C784−20
4.2.2 The finished pellets shall conform to the following 5.3.3 Pellets selected by mutual agreement between the
chemical analysis: buyer and the seller shall be used as standards of acceptability
to satisfy the requirements of 5.3.1. The seller shall submit as
Element Weight %, max
Silicon (Si) 2.0
homogeneity standards, pellets representative of each specified
Iron + Chromium + Nickel 0.6
boron concentration (in accor
...
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: C784 − 16 C784 − 20
Standard Specification for
Nuclear-Grade Aluminum Oxide-Boron Carbide Composite
1
Pellets
This standard is issued under the fixed designation C784; 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 applies to pellets composed of mixtures of aluminum oxide and boron carbide that may be ultimately used
in a reactor core, for example, in neutron absorber rods.
1.2 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.after
SI units are provided for information only and are not considered standard.
1.3 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.
2. Referenced Documents
2
2.1 ASTM Standards:
C559 Test Method for Bulk Density by Physical Measurements of Manufactured Carbon and Graphite Articles
C750 Specification for Nuclear-Grade Boron Carbide Powder
C809 Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Aluminum Oxide and
AluminumOxide-Boron Carbide Composite Pellets
C859 Terminology Relating to Nuclear Materials
C1031 Specification for Nuclear-Grade Aluminum Oxide Powder
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
E105 Practice for Probability Sampling of Materials
3
2.2 ANSI Standard:
ANSI/ASME NQA-1 Quality Assurance Program Requirements for Nuclear Facilities
4
2.3 Government Standard:
Title 10,10 CFR 50 Title 10, Code of Federal Regulations, Energy Part 50 (10CFR50), Domestic 50—Domestic Licensing of
Production and Utilization Facilities
3. Terminology
3.1 Definitions:
3.1.1 Terms shall be defined in accordance with Terminology C859 except for the following:
3.1 Definitions of Terms Specific to This Standard:Definitions:
3.1.1 Terms shall be defined in accordance with Terminology C859, except for the following:
3.1.2 buyer—organization issuing the purchase order.
3.1.3 pellet—a fabricated geometric shape of aluminum oxide-boron carbide having a chemical composition as described in
Section 4.
1
This specification is under the jurisdiction of ASTM Committee C26 on Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.03 on Neutron Absorber
Materials Specifications.
Current edition approved April 1, 2016Jan. 1, 2020. Published April 2016February 2020. Originally approved in 1976. Last previous edition approved in 20122016 as
C784 – 05 (2012).C784 – 16. DOI: 10.1520/C0784-16.10.1520/C0784-20.
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 National Standards Institute, 11 W. 42nd St., 13thInstitute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036.10036, http://www.ansi.org.
4
Available from Superintendent of Documents, U.S. Government Printing Office, Washington, DC 20402.Superintendent of Documents, 732 N. Capitol St., NW,
Washington, DC 20401-0001, http://www.access.gpo.gov.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C784 − 20
3.1.4 pellet lot—that quantity of pellets produced from one powder mixture lot using one set of mixing and process parameters.
Pelletparameters; pellet lot size shall be agreed upon between the seller and the buyer.
3.1.5 powder mixture lot—a specified quantity of aluminum oxide and boron carbide made up of powders from one or more
sources blended together such that samples taken in accordance with Section 7 can be considered as representative of the entire
specified quantity.
3.1.6 seller—pellet supplier.
4. Technical Requirements
4.1 Major Constituents—Aluminum oxide-boron carbide pellets shall be fabricated using major constituents that meet the
requirements of Specifications C750 and C1031.
4.2 Chemical Composition:
4.2.1 Use analytical chemistry methods in accordance with Test M
...
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