ASTM C750-89(1997)

Standard Specification for Nuclear-Grade Boron Carbide Powder

SCOPE
1.1 This specification defines the chemical and physical requirements for boron carbide powder intended for a variety of nuclear applications. Because each application has a different need for impurity and boron requirements, three different chemical compositions of powder are specified. In using this specification, it is necessary to dictate which type of powder is intended to be used. In general, the intended applications for the various powder types are as follows:  
1.1.1 Type 1 -For use as particulate material in nuclear reactor core applications.  
1.1.2 Type 2 -Powder that will be further processed into a fabricated shape for use in a nuclear reactor core or used in non-core applications when the powder directly or indirectly may cause adverse effects on structural components, such as halide stress corrosion of stainless steel.  
1.1.3 Type 3 -Powder that will be used for non-core applications or special in-core applications.

General Information

• Status: Historical
• Publication Date: 09-May-1997
• ICS: 27.120.30 - Fissile materials and nuclear fuel technology
• ICS: 71.060.50 - Salts
• Technical Committee: C26 - Nuclear Fuel Cycle
• Drafting Committee: C26.03 - Neutron Absorber Materials Specifications

Relations

• Replaced By: ASTM C750-03 - Standard Specification for Nuclear-Grade Boron Carbide Powder
• Effective Date: 10-Jul-2003
• Referred By: ASTM C791-19 - Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide
• Effective Date: 10-May-1997
• Referred By: ASTM C751-20 - Standard Specification for Nuclear-Grade Boron Carbide Pellets
• Effective Date: 10-May-1997
• Referred By: ASTM C784-20 - Standard Specification for Nuclear-Grade Aluminum Oxide-Boron Carbide Composite Pellets
• Effective Date: 10-May-1997

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: C 750 – 89 (Reapproved 1997)
Standard Specification for
Nuclear-Grade Boron Carbide Powder
This standard is issued under the fixed designation C 750; 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 (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 11 Specification for Wire-Cloth Sieves for Testing Pur-
poses
1.1 This specification defines the chemical and physical
E 105 Practice for Probability Sampling of Materials
requirements for boron carbide powder intended for a variety
2.2 ANSI Standard:
of nuclear applications. Because each application has a differ-
ANSI/ASME NQA-1 Quality Assurance Program Require-
ent need for impurity and boron requirements, three different
ments for Nuclear Facilities
chemical compositions of powder are specified. In using this
2.3 U.S. Government Document:
specification, it is necessary to dictate which type of powder is
Title 10, Code of Federal Regulations, Energy Part 50
intended to be used. In general, the intended applications for
(10CFR 50), Domestic Licensing of Production and Uti-
the various powder types are as follows:
lization Facilities
1.1.1 Type 1—For use as particulate material in nuclear
reactor core applications.
3. Terminology
1.1.2 Type 2—Powder that will be further processed into a
3.1 Descriptions of Terms Specific to This Standard—Terms
fabricated shape for use in a nuclear reactor core or used in
shall be defined in accordance with Terminology C 859 except
non-core applications when the powder directly or indirectly
for the following:
may cause adverse effects on structural components, such as
3.1.1 buyer—organization issuing the purchase order.
halide stress corrosion of stainless steel.
3.1.2 powder lot—that quantity of boron carbide powder
1.1.3 Type 3—Powder that will be used for non-core appli-
blended together such that samples taken in accordance with
cations or special in-core applications.
the procedures of 8.1 can be considered as representative of the
2. Referenced Documents entire powder lot.
3.1.3 seller—boron carbide powder supplier.
2.1 ASTM Standards:
B 329 Test Method for Apparent Density of Powders of
4. Ordering Information
Refractory Metals and Compounds by the Scott Volume-
2 4.1 The buyer may specify the following information on the
ter
order:
C 117 Test Method for Material Finer than 75-μm (No. 200)
3 4.1.1 Quantity (weight of delivered product).
Sieve in Mineral Aggregates by Washing
4.1.2 Nominal particle size, particle size range, and appli-
C 371 Test Method for Wire-Cloth Sieve Analysis of Non-
4 cable tolerance.
plastic Ceramic Powders
4.1.3 Density and method of measurement.
C 493 Test Method for Bulk Density and Porosity of Granu-
5 4.1.4 Angular or spherical shape.
lar Refractory Materials by Mercury Displacement
4.1.5 Shape factor.
C 791 Test Methods for Chemical, Mass Spectrometric, and
4.1.6 Lot size.
Spectrochemical Analysis of Nuclear-Grade Boron Car-
6 4.1.7 Sampling requirements.
bide
6 4.1.8 Powder type (1, 2, or 3).
C 859 Terminology Relating to Nuclear Materials
4.1.9 Isotopic content ( B).
5. Chemical Composition
This specification is under the jurisdiction of ASTM Committee C-26 on
NOTE 1—B C powder is hygroscopic and certain applications require
Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.03 on
low-moisture content.
Neutron Absorber Materials Specifications.
5.1 The material shall conform to the chemical composition
Current edition approved June 30, 1989. Published August 1989. Originally
published as C 750 – 74. Last previous edition C 750 – 85.
Annual Book of ASTM Standards, Vol 02.05.
Annual Book of ASTM Standards, Vol 04.02.
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Annual Book of ASTM Standards, Vol 15.01.
Floor, New York, NY 10036.
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Available from Superintendent of Documents, U.S. Government Printing
Office, Washington, DC 20402.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
C 750
requirements prescribed in Table 1 (see Methods C 791). purchase order. Recommended Practice E 105 is referenced as
5.2 When agreed upon between the buyer and the seller, the a guide.
weight loss of the powder shall not exceed 1 % when heated at 8.2 Each sample taken shall be sufficient to perform the
110°C for |n$ h in air. following in the event they are necessary or desired by the
buyer:
6. Physical Requirements
8.2.1 Quality verification tests by the seller,
6.1 The nominal particle size, particle size range, and 8.2.2 Acceptance tests by the buyer,
applicable tolerances shall be agreed upon between the buyer
8.2.3 Referee tests in the event these become necessary, and
and the seller. Method C 371, Test Method C 117, and Speci- 8.2.4 Retention of archive samples by the seller.
fication E 11 may be applied for particles larger than 37 μm.
8.3 Archive samples shall be
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