ASTM C751-20
(Specification)Standard Specification for Nuclear-Grade Boron Carbide Pellets
Standard Specification for Nuclear-Grade Boron Carbide Pellets
SCOPE
1.1 This specification applies to boron carbide pellets for use as a control material in nuclear reactors.
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.
General Information
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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:C751 −20
Standard Specification for
1
Nuclear-Grade Boron Carbide Pellets
This standard is issued under the fixed designation C751; 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.
4
1. Scope 2.3 U.S. Government Document:
10 CFR 50 Title 10, Code of Federal Regulations, Energy
1.1 This specification applies to boron carbide pellets for
Part 50—Domestic Licensing of Production and Utiliza-
use as a control material in nuclear reactors.
tion Facilities
1.2 The values stated in SI units are to be regarded as
3. Terminology
standard. The values given in parentheses after SI units are
3.1 Definitions:
provided for information only and are not considered standard.
3.1.1 Terms shall be defined in accordance with Terminol-
1.3 This international standard was developed in accor-
ogy C859, except for the following:
dance with internationally recognized principles on standard-
3.1.2 buyer—the organization issuing the purchase order.
ization established in the Decision on Principles for the
3.1.3 pellet lot—quantity of pellets produced from one
Development of International Standards, Guides and Recom-
boron carbide powder lot using one set of process parameters;
mendations issued by the World Trade Organization Technical
the pellet lot size shall be agreed upon between seller and
Barriers to Trade (TBT) Committee.
buyer.
3.1.4 powder lot—a fixed quantity of boron carbide powder
2. Referenced Documents
blended together such that samples taken in accordance with
2
2.1 ASTM Standards:
Section 7 on Sampling can be considered as representative of
C559 Test Method for Bulk Density by Physical Measure-
the entire fixed quantity.
ments of Manufactured Carbon and Graphite Articles
3.1.5 seller—boron carbide pellet supplier.
C750 Specification for Nuclear-Grade Boron Carbide Pow-
4. Chemical Composition
der
C791 Test Methods for Chemical, Mass Spectrometric, and
4.1 Thestartingboroncarbidepowderusedtoproducethese
Spectrochemical Analysis of Nuclear-Grade Boron Car- pellets shall be in accordance with Specification C750.
bide
4.2 Analytical chemistry methods used to test pellets for
C859 Terminology Relating to Nuclear Materials
conformance with this specification shall be those of Test
E105 Practice for Probability Sampling of Materials
Methods C791 or demonstrated equivalent methods agreed
3
upon between buyer and seller.
2.2 ANSI Standard:
10 10
ANSI/ASME NQA-1 Quality Assurance Program Require-
4.3 The B concentration (grams B per unit volume or
10
ments for Nuclear Facilities
grams B per unit length) may be specified by the buyer. The
buyer should consider the following in specifying the allow-
10
able range in B concentration:
1
4.3.1 Variations in chemical composition,
This specification is under the jurisdiction of ASTM Committee C26 on
Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.03 on 4.3.2 Bulk pellet density,
Neutron Absorber Materials Specifications.
4.3.3 Boron isotopic composition, and
Current edition approved Jan. 1, 2020. Published February 2020. Originally
4.3.4 Pellet dimensions.
approved in 1975. Last previous edition approved in 2016 as C751 – 16. DOI:
10.1520/C0751-20.
4.4 The finished boron carbide pellets shall conform to the
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
chemical analysis in Table 1.
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
4
the ASTM website. Available from U.S. Government Printing Office, Superintendent of
3
Available fromAmerican National Standards Institute (ANSI), 25 W. 43rd St., Documents, 732 N. Capitol St., NW, Washington, DC 20401-0001, http://
4th Floor, New York, NY 10036, http://www.ansi.org. 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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C751−20
TABLE 1 Chemical Analysis of Finished Boron Carbide Pellets
materials such as plastics and paper used in packaging.
Constituent Limits Cleaning solutions, if used, shall be free of halides or nonvola-
Total boron (B) 81.0 % weight, max tile additives and shall be removed from the pellets prior to
73.0 % weight, min
sampling and packaging.
Nitric acid-soluble boron (B) 0.5 % weight, max
Water-soluble boron (B) 0.2 % weight, max
Calcium (Ca) 0.3 % weight, max 7. Sam
...
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: C751 − 16 C751 − 20
Standard Specification for
1
Nuclear-Grade Boron Carbide Pellets
This standard is issued under the fixed designation C751; 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 boron carbide pellets for use as a control material in nuclear reactors.
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
C791 Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide
C859 Terminology Relating to Nuclear Materials
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 U.S. Government Document:
Title 10,10 CFR 50 CFR, Energy Part 50 (10 CFR 50) Licensing of Domestic Title 10, Code of Federal Regulations, Energy
Part 50—Domestic Licensing of Production and Utilization Facilities
3. Terminology
3.1 Terms shall be defined in accordance with Terminology C859 or ASTM Dictionary of Engineering Science and Technology,
except for the following:
3.1 Definitions:
3.1.1 Terms shall be defined in accordance with Terminology C859, except for the following:
3.1.2 buyer—the organization issuing the purchase order.
3.1.3 pellet lot—quantity of pellets produced from one boron carbide powder lot using one set of process parameters; the pellet
lot size shall be agreed upon between seller and buyer.
3.1.4 powder lot—a fixed quantity of boron carbide powder blended together such that samples taken in accordance with Section
7 on Sampling can be considered as representative of the entire fixed quantity.
3.1.5 seller—boron carbide pellet supplier.
3.2 buyer—the organization issuing the purchase order.
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 1975. Last previous edition approved in 20122016 as
C751 – 07 (2012).C751 – 16. DOI: 10.1520/C0751-16.10.1520/C0751-20.
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 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 ----------------------
C751 − 20
3.3 pellet lot—quantity of pellets produced from one boron carbide powder lot using one set of process parameters. The pellet
lot size shall be agreed upon between seller and buyer.
3.4 powder lot—a fixed quantity of boron carbide powder blended together such that samples taken in accordance with Section
7 on Sampling can be considered as representative of the entire fixed quantity.
3.5 seller—boron carbide pellet supplier.
4. Chemical Composition
4.1 The starting boron carbide powder used to produce these pellets shall be in accordance with Specification C750.
4.2 Analytical chemistry methods used to test pellets for conformance with this specification shall be those of Method Test
Methods C791 or de
...
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