ASTM C751-16
(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 the standard. The values given in parentheses are for information only.
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Designation:C751 −16
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 3. Terminology
1.1 This specification applies to boron carbide pellets for
3.1 Terms shall be defined in accordance with Terminology
use as a control material in nuclear reactors.
C859 or ASTM Dictionary of Engineering Science and
Technology, except for the following:
1.2 The values stated in SI units are to be regarded as the
standard. The values given in parentheses are for information
3.2 buyer—the organization issuing the purchase order.
only.
3.3 pellet lot—quantity of pellets produced from one boron
2. Referenced Documents
carbide powder lot using one set of process parameters. The
2
pellet lot size shall be agreed upon between seller and buyer.
2.1 ASTM Standards:
C559 Test Method for Bulk Density by Physical Measure-
3.4 powder lot—a fixed quantity of boron carbide powder
ments of Manufactured Carbon and Graphite Articles
blended together such that samples taken in accordance with
C750 Specification for Nuclear-Grade Boron Carbide Pow-
Section 7 on Sampling can be considered as representative of
der
the entire fixed quantity.
C791 Test Methods for Chemical, Mass Spectrometric, and
3.5 seller—boron carbide pellet supplier.
Spectrochemical Analysis of Nuclear-Grade Boron Car-
bide
4. Chemical Composition
C859 Terminology Relating to Nuclear Materials
E105 Practice for Probability Sampling of Materials
4.1 Thestartingboroncarbidepowderusedtoproducethese
2.2 ANSI Standard:
pellets shall be in accordance with Specification C750.
ANSI/ASME NQA-1 Quality Assurance Program Require-
3
4.2 Analytical chemistry methods used to test pellets for
ments for Nuclear Facilities
conformance with this specification shall be those of Method
2.3 U.S. Government Document:
Title 10, CFR, Energy Part 50 (10 CFR 50) Licensing of C791 or demonstrated equivalent methods agreed upon be-
4
tween buyer and seller.
Domestic Production and Utilization Facilities
10 10
4.3 The B concentration (gram B per unit volume or
10
1
This specification is under the jurisdiction of ASTM Committee C26 on grams B per unit length) may be specified by the buyer. The
Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.03 on
buyer should consider the following in specifying the allow-
Neutron Absorber Materials Specifications.
10
able range in B concentration:
Current edition approved April 1, 2016. Published April 2016. Originally
approved in 1975. Last previous edition approved in 2012 as C751 – 07 (2012).
4.3.1 Variations in chemical composition,
DOI: 10.1520/C0751-16.
2 4.3.2 Bulk pellet density,
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
4.3.3 Boron isotopic composition, and
Standards volume information, refer to the standard’s Document Summary page on
4.3.4 Pellet dimensions.
the ASTM website.
3
Available from American National Standards Institute, 11 W. 42nd St., 13th
4.4 The finished boron carbide pellets shall conform to the
Floor, New York, NY 10036.
4
Available from U.S. Government Printing Office, Washington, DC 20402. chemical analysis in Table 1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C751−16
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. Sampling
Iron (Fe) 1.0 % weight, max
Total boron + total carbon (B+C) 98.0 % weight, min 7.1 Sampling plans to meet acceptance criteria and inspec-
Fluoride (F) 25 µg/g, max
tion and measurement procedures that describe the method of
Chloride (Cl) 75 µg/g, max
A compliance with this specification shall be approved by the
Water 750 µg/g, max
buyer prior to manufacture of the required pellets. The degree
A
Ultimate usage of the pellets in a control rod may require drying to a lower
of sampling varies with the application and for this reason
moisture level.
should be specified in the purchase order. Practice E105 is
referenced as a guide.
5. Phy
...
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 − 07 (Reapproved 2012) C751 − 16
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.
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
2.2 ANSI Standard:
3
ANSI/ASME NQA-1 Quality Assurance Program Requirements for Nuclear Facilities
2.3 U.S. Government Document:
4
Title 10, CFR, Energy Part 50 (10 CFR 50) Licensing of Domestic 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:
3.2 buyer—the organization issuing the purchase order.
3.3 pellet lot—that 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—the 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 C791 or
demonstrated equivalent methods agreed upon between buyer and seller.
10 10 10
4.3 The B concentration (gram B per unit volume or grams B per unit length) may be specified by the buyer. The buyer
10
should consider the following in specifying the allowable range in B concentration:
4.3.1 Variations in chemical composition,
4.3.2 Bulk pellet density,
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 Jan. 1, 2012April 1, 2016. Published January 2012April 2016. Originally approved in 1975. Discontinued in April 2001 and reinstated as
C751–07. Last previous edition approved in 20072012 as C751 – 07.C751 – 07 (2012). DOI: 10.1520/C0751-07R12.10.1520/C0751-16.
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., 13th Floor, New York, NY 10036.
4
Available from U.S. Government Printing Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
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C751 − 16
4.3.3 Boron isotopic composition, and
4.3.4 Pellet dimensions.
4.4 The finished boron carbide pellets shall conform to the chemical analysis in Table 1.
TABLE 1 1 Chemical Analysis of Finished Boron Carbide Pellets
Constituent Limits
Total boron (B) 81.0 % weight, max
73.0 % weight, min
Nitric acid-soluble boron (B) 0.5 % weight, max
Water-soluble boron (B) 0.2 % weight, max
Calcium (Ca) 0.3 % weight, max
Iron (Fe) 1.0 % weight, max
Total boron + total carbon (B+C) 98.0 % weight, min
Fluoride (F) 25 μg/g, max
Chloride (Cl) 75 μg/g, max
A
Water 750 μg/g, max
A
Ultimate usage of the pellets in a control rod may require drying to a lower
moisture level.
2
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C751 − 16
5. Physical Requirements
5.1 Physical Dimensions:
5.1.1 Dimensional requirements shall be in accordance with
...
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