ASTM C784-16
(Specification)Standard Specification for Nuclear-Grade Aluminum Oxide-Boron Carbide Composite Pellets
Standard Specification for Nuclear-Grade Aluminum Oxide-Boron Carbide Composite Pellets
ABSTRACT
This specification applies to composite pellets composed of mixtures of nuclear-grade aluminum oxide and boron carbide that may be ultimately used in a reactor core, for example, in neutron absorber rods. Specimens shall be sampled and tested as appropriate, and shall adhere accordingly to required chemical compositions, physical dimensions, density, boron carbide homogeneity, mechanical properties, visual appearance, end and circumferential chips, cracks, and fissures and other defects.
SCOPE
1.1 This specification applies to pellets composed of mixtures of aluminum oxide and boron carbide that may be ultimately used in a reactor core, for example, in neutron absorber rods.
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:C784 −16
Standard Specification for
Nuclear-Grade Aluminum Oxide-Boron Carbide Composite
1
Pellets
This standard is issued under the fixed designation C784; 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 2.3 Government Standard:
Title 10, Code of Federal Regulations, Energy Part 50
1.1 This specification applies to pellets composed of mix-
(10CFR50), Domestic Licensing of Production and Utili-
tures of aluminum oxide and boron carbide that may be
4
zation Facilities
ultimately used in a reactor core, for example, in neutron
absorber rods.
3. Terminology
1.2 The values stated in SI units are to be regarded as the
3.1 Definitions:
standard. The values given in parentheses are for information
3.1.1 Terms shall be defined in accordance with Terminol-
only.
ogy C859 except for the following:
3.2 Definitions of Terms Specific to This Standard:
2. Referenced Documents
2 3.2.1 buyer—organization issuing the purchase order.
2.1 ASTM Standards:
3.2.2 pellet—a fabricated geometric shape of aluminum
C559 Test Method for Bulk Density by Physical Measure-
oxide-boron carbide having a chemical composition as de-
ments of Manufactured Carbon and Graphite Articles
scribed in Section 4.
C750 Specification for Nuclear-Grade Boron Carbide Pow-
der
3.2.3 pellet lot—that quantity of pellets produced from one
C809 Test Methods for Chemical, Mass Spectrometric, and
powder mixture lot using one set of mixing and process
Spectrochemical Analysis of Nuclear-Grade Aluminum
parameters. Pellet lot size shall be agreed upon between the
Oxide and AluminumOxide-Boron Carbide Composite
seller and the buyer.
Pellets
3.2.4 powder mixture lot—a specified quantity of aluminum
C859 Terminology Relating to Nuclear Materials
oxideandboroncarbidemadeupofpowdersfromoneormore
C1031 Specification for Nuclear-Grade Aluminum Oxide
sourcesblendedtogethersuchthatsamplestakeninaccordance
Powder
with Section 7 can be considered as representative of the entire
E11 Specification for Woven Wire Test Sieve Cloth and Test
specified quantity.
Sieves
3.2.5 seller—pellet supplier.
E105 Practice for Probability Sampling of Materials
2.2 ANSI Standard:
4. Technical Requirements
ANSI/ASME NQA-1 Quality Assurance Program Require-
3 4.1 Major Constituents—Aluminum oxide-boron carbide
ments for Nuclear Facilities
pellets shall be fabricated using major constituents that meet
the requirements of Specifications C750 and C1031.
1
This specification is under the jurisdiction of ASTM Committee C26 on
4.2 Chemical Composition:
Nuclear Fuel Cycle and is the direct responsibility of Subcommittee C26.03 on
4.2.1 Use analytical chemistry methods in accordance with
Neutron Absorber Materials Specifications.
Current edition approved April 1, 2016. Published April 2016. Originally
Methods C809 or demonstrated alternate methods agreed upon
approved in 1976. Last previous edition approved in 2012 as C784 – 05 (2012).
between the buyer and the seller.
DOI: 10.1520/C0784-16.
2
4.2.2 The finished pellets shall conform to the following
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 chemical analysis:
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
3 4
Available from American National Standards Institute, 11 W. 42nd St., 13th Available from Superintendent of Documents, U.S. Government Printing
Floor, New York, NY 10036. Office, Washington, DC 20402.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
1
---------------------- Page: 1 ----------------------
C784−16
to satisfy the requirements of 5.3.1. The seller shall submit as
Element Weight %, max
Silicon (Si) 2.0
homogeneity standards, pellets representative of each specified
Iron + Chromium + Nickel 0.6
boron concentration (per 4.2.4).
(Fe+Cr+Ni)
5.3.4 Particle size limits of boron carbide particles shall be
Magnesium (Mg) 1.0
Sodium (Na) 0.2
specified by the buyer in accordance with intended application.
Calcium (Ca) 0.3
Hafnium (Hf) 200 µg/g pellet
5.4 Mechanical Properties—Required mechanical proper-
Fluorine (F) 50 µg/g pellet
ties and test methods shall be mutually agreed upon between
Fluorine + Chlorine + Iodine + Bromine 100 µg/g pellet
the buyer and the seller.
(F+Cl+I+Br)
Gadolinium (Gd) 25 µg/g pellet
5.5 Visual Appearance—Visual examination shall be con-
Samarium (Sm) 50 µg/g pellet
Europium (Eu) 50 µg/g pellet ducted on finished pellets in accordance with Section 7. The
Dysprosium (Dy) 50 µg/g pellet
...
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: C784 − 05 (Reapproved 2012) C784 − 16
Standard Specification for
Nuclear-Grade Aluminum Oxide-Boron Carbide Composite
1
Pellets
This standard is issued under the fixed designation C784; 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 pellets composed of mixtures of aluminum oxide and boron carbide that may be ultimately used
in a reactor core, for example, in neutron absorber rods.
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
C809 Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Aluminum Oxide and
AluminumOxide-Boron Carbide Composite Pellets
C859 Terminology Relating to Nuclear Materials
C1031 Specification for Nuclear-Grade Aluminum Oxide Powder
E11 Specification for Woven Wire Test Sieve Cloth and Test Sieves
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 Government Standard:
4
Title 10, Code of Federal Regulations, Energy Part 50 (10CFR50), Domestic Licensing of Production and Utilization Facilities
3. Terminology
3.1 Definitions:
3.1.1 Terms shall be defined in accordance with Terminology C859 except for the following:
3.2 Definitions of Terms Specific to This Standard:
3.2.1 buyer—organization issuing the purchase order.
3.2.2 pellet—a fabricated geometric shape of aluminum oxide-boron carbide having a chemical composition as described in
Section 4.
3.2.3 pellet lot—that quantity of pellets produced from one powder mixture lot using one set of mixing and process parameters.
Pellet lot size shall be agreed upon between the seller and the buyer.
3.2.4 powder mixture lot—a specified quantity of aluminum oxide and boron carbide made up of powders from one or more
sources blended together such that samples taken in accordance with Section 7 can be considered as representative of the entire
specified quantity.
3.2.5 seller—pellet supplier.
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 1976. Last previous edition approved in 20052012 as
C784 – 05.C784 – 05 (2012). DOI: 10.1520/C0784-05R12.10.1520/C0784-16.
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 Superintendent of Documents, 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
---------------------- Page: 1 ----------------------
C784 − 16
4. Technical Requirements
4.1 Major Constituents—Aluminum oxide-boron carbide pellets shall be fabricated using major constituents that meet the
requirements of Specifications C750 and C1031.
4.2 Chemical Composition:
4.2.1 Use analytical chemistry methods in accordance with Methods C809 or demonstrated alternate methods agreed upon
between the buyer and the seller.
4.2.2 The finished pellets shall conform to the following chemical analysis:
2
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C784 − 16
Si 2.0 weight % max
Fe + Cr + Ni 0.6 weight % max
Mg 1.0 weight % max
Na 0.2 weight % maxs
Ca 0.3 weight % max
Hf 200 μg/g pellet max
F 50 μg/g pellet max
F + Cl + I + Br 100 μg/g pellet max
Gd 25 μg/g pellet max
Sm 50 μg/g pellet max
Eu 50 μg/g pellet max
Dy 50 μg/g pellet max
Element Weight %, max
Silicon (Si) 2.0
Iron + Chromium + Nickel 0.6
(Fe + Cr + Ni)
Magnesium (Mg) 1.0
Sodium (Na) 0.2
Calcium (Ca) 0.3
Hafnium (Hf) 200 μg/g pellet
Fluorine (F) 50 μg/g pellet
F
...
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