ASTM C751-07(2012)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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(Reapproved 2012)
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
the entire fixed quantity.
2. Referenced Documents
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
E105 Practice for Probability Sampling of Materials
4.3 The B concentration (gram B per unit volume or
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
4.3.3 Boron isotopic composition, and
Domestic Production and Utilization Facilities
4.3.4 Pellet dimensions.
4.4 The finished boron carbide pellets shall conform to the
3. Terminology
chemical analysis in Table 1.
3.1 Terms shall be defined in accordance with Terminology
C859, except for the following:
5. 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 Jan. 1, 2012. Published January 2012. 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 2007 as C751 – 07. DOI: 10.1520/C0751-07R12.
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 with 5.2.1 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 (2012)
TABLE 1 1 Chemical Analysis of Finished Boron Carbide Pellets
of sampling varies with the application and for this reason
Constituent Limits shouldbespecifiedinthepurchaseorder.E105isreferencedas
Total boron 81.0 % weight, max a guide.
73.0 % weight, min
7.2 Powder and pellet samples taken shall be sufficient, as
Nitric acid-soluble boron 0.5 % weight, max
Water-soluble boron 0.2 % weight, max
necessary, for quality verification tests, acceptance tests, ref-
Calcium 0.3 % weight, max
eree tests, and the retention of archive samples
Iron 1.0 % weight, max
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 buyer’s instructions.
Chloride 75 µg/g, max
A
Water 750 µg/g, max
A
8. Inspection and Certification
Ultimate usage of the pell
...