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ASTM C751-07

(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.

General Information

Status
Historical
Publication Date
14-Feb-2007
ICS
27.120.30 - Fissile materials and nuclear fuel technology
71.060.50 - Salts
Technical Committee
C26 - Nuclear Fuel Cycle
Drafting Committee
C26.03 - Neutron Absorber Materials Specifications
Current Stage
Ref Project

Relations

Replaced By
ASTM C751-07(2012) - Standard Specification for Nuclear-Grade Boron Carbide Pellets
Effective Date
01-Jan-2012
Referred By
ASTM C791-19 - Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide
Effective Date
15-Feb-2007

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ASTM C751-07 - Standard Specification for Nuclear-Grade Boron Carbide PelletsASTM C751-07 - Standard Specification for Nuclear-Grade Boron Carbide Pellets
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ASTM C751-07 - Standard Specification for Nuclear-Grade Boron Carbide Pellets
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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: C751 – 07
Standard Specification for
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 3.3 pellet lot—that quantity of pellets produced from one
boron carbide powder lot using one set of process parameters.
1.1 This specification applies to boron carbide pellets for
The pellet lot size shall be agreed upon between seller and
use as a control material in nuclear reactors.
buyer.
1.2 The values stated in SI units are to be regarded as the
3.4 powder lot—a fixed quantity of boron carbide powder
standard. The values given in parentheses are for information
blended together such that samples taken in accordance with
only.
Section 7 on Sampling can be considered as representative of
2. Referenced Documents the entire fixed quantity.
3.5 seller—the boron carbide pellet supplier.
2.1 ASTM Standards:
C559 Test Method for Bulk Density by Physical Measure-
4. Chemical Composition
ments of Manufactured Carbon and Graphite Articles
4.1 Thestartingboroncarbidepowderusedtoproducethese
C750 Specification for Nuclear-Grade Boron Carbide Pow-
pellets shall be in accordance with Specification C750.
der
4.2 Analytical chemistry methods used to test pellets for
C791 Test Methods for Chemical, Mass Spectrometric, and
conformance with this specification shall be those of Method
Spectrochemical Analysis of Nuclear-Grade Boron Car-
C791 or demonstrated equivalent methods agreed upon be-
bide
tween buyer and seller.
C859 Terminology Relating to Nuclear Materials
10 10
4.3 The B concentration (gram B per unit volume or
E105 Practice for Probability Sampling Of Materials
grams B per unit length) may be specified by the buyer. The
2.2 ANSI Standard:
buyer should consider the following in specifying the allow-
ANSI/ASME NQA-1 Quality Assurance Program Require-
able range in B concentration:
ments for Nuclear Facilities
4.3.1 Variations in chemical composition,
2.3 U.S. Government Document:
4.3.2 Bulk pellet density,
Title 10, CFR, Energy Part 50 (10 CFR 50) Licensing of
4 4.3.3 Boron isotopic composition, and
Domestic Production and Utilization Facilities
4.3.4 Pellet dimensions.
3. Terminology 4.4 The finished boron carbide pellets shall conform to the
chemical analysis in Table 1.
3.1 Terms shall be defined in accordance with Terminology
C859, except for the following:
5. Physical Requirements Physical Requirements
3.2 buyer—the organization issuing the purchase order.
5.1 Physical Dimensions:
5.1.1 Dimensional requirements shall be in accordance with
applicable drawings and purchase order documents.
This specification is under the jurisdiction of ASTM Committee C26 on
5.1.2 Pellet dimensions shall be measured to ensure com-
Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.03 on
pliance with the buyer’s requirements.
Neutron Absorber Materials Specifications.
Current edition approved Feb. 15, 2007. Published April 2007. Originally 5.2 Density:
approved in 1975. Discontinued in April 2001 and reinstated as C751–07. Last
5.2.1 Pellet density limits shall be specified by the buyer.
previous edition approved in 1992 as C751 – 92. DOI: 10.1520/C0751-07.
5.2.2 The method of density measurement shall be Test
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Method C559 or an alternative method approved by the buyer.
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
Sampling plans to meet the acceptance criteria shall be agreed
the ASTM website.
upon between the buyer and the seller. The method of density
Available from American National Standards Institute, 11 W. 42nd St., 13th
measurement and the method of compliance with5.2.1 shall be
Floor, New York, NY 10036.
Available from U.S. Government Printing Office, Washington, DC 20402. approved by the buyer.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
C751 – 07
TABLE 1 1 Chemical Analysis of Finished Boron Carbide Pellets
buyer prior to manufacture of the required pellets. The degree
Constituent Limits of sampling varies with the application and for this reason
shouldbespecifiedinthepurchaseorder.E105isreferencedas
Total boron 81.0 % weight, max
73.0 % weight, min
a guide.
Nitric acid-soluble boron 0.5 % weight, max
7.2 Powder and pellet samples taken shall be sufficient, as
Water-soluble boron 0.2 % weight, max
necessary, for quality verification tests, acceptance tests, ref-
Calcium 0.3 % weight, max
Iron 1.0 % weight, max
eree tests, and the retention of archive samples
Total boron + total carbon 98.0 % weight, min
7.3 Archive samples shall be retained and disposed of in
Fluoride 25 µg/g, max
accordance with the buye
...

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FIG. 1 Bored Forgings
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FIG. 2 Solid Forgings
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FIG. 3 Conversion Factors to Be Used in Conjunction with Fig. 1 and Fig. 2 if a Change in the Reference Reflector Diameter is Required
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5.1 The kinematic viscosity characterizes flow behavior. The method is used to determine the consistency of liquid asphalt as one element in establishing the uniformity of shipments or sources of supply. The specifications are usually at temperatures of 60 and 135 °C.
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