Standard Historical Last Updated: Dec 29, 2011 Track Document
ASTM C791-04

Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide

Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide C0791-04 ASTM|C0791-04|en-US Standard Test Methods for Chemical, Mass Spectrometric, and Spectrochemical Analysis of Nuclear-Grade Boron Carbide Standard new BOS Vol. 12.01 Committee C26
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Significance and Use

Boron carbide is used as a control material in nuclear reactors. In order to be suitable for this purpose, the material must meet certain criteria for assay, isotopic composition, and impurity content. These methods are designed to show whether or not a given material meets the specifications for these items as described in Specifications C 750 and C 751.

3.1.1 An assay is performed to determine whether the material has the specified boron content.

3.1.2 Determination of the isotopic content of the boron is made to establish whether the content is in compliance with the purchaser’specifications.

3.1.3 Impurity content is determined to ensure that the maximum concentration limit of certain impurity elements is not exceeded.

Scope

1.1 These test methods cover procedures for the chemical, mass spectrometric, and spectrochemical analysis of nuclear-grade boron carbide powder and pellets to determine compliance with specifications.

1.2 The analytical procedures appear in the following order:

Sections
Total Carbon by Combustion and Gravimetry7-17
Total Boron by Titrimetry18-28
Isotopic Composition by Mass Spectrometry29-38
Chloride and Fluoride Separation by Pyrohydrolysis39-45
Chloride by Constant-Current Coulometry46-54
Fluoride by Ion-Selective Electrode55-63
Water by Constant-Voltage Coulometry64-72
Impurities by Spectrochemical Analysis73-81
Soluble Boron by Titrimetry82-95
Soluble Carbon by a Manometric Measurement96-105
Metallic Impurities by a Direct Reader Spectrometric Method106-114
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Details
Book of Standards Volume: 12.01
Developed by Subcommittee: C26.03
Pages: 23
DOI: 10.1520/C0791-04
ICS Code: 27.120.30