1. 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:

1.3 This method covers the determination of total carbon in nuclear-grade, boron carbide in either powder or pellet form.

1.4 This method covers the determination of total boron in samples of boron carbide powder and pellets. The recommended amount of boron for each titration is 100 10 mg.

1.5 This method covers the determination of the isotopic composition of boron in nuclear-grade boron carbide, in powder and pellet form, containing natural to highly enriched boron.

1.6 This method covers the separation of up to 100 g of halides per gram of boron carbide. The separated halides are measured using other methods found in this standard.

1.7 This method covers the measurement of chloride after separation from boron carbide by pyrohydrolysis. The lower limit of the method is about 2 g of chloride per titration.

1.8 This method covers the measurement of fluoride after separation from boron carbide by pyrohydrolysis. The lower limit of the method is about 2 g of fluoride per measurement.

1.9 This method covers the determination of water in boron carbide in either powder or pellet form. The lower limit of the method is 5 g of water.

1.10 This method covers the determination of 14 impurity elements in boron carbide in either powder or pellet form.

1.11 This method covers the determination of soluble boron in boron carbide. Soluble boron is defined as that boron dissolved under the conditions of the test.

1.12 This method covers the determination of soluble carbon in boron carbide. The lower limit of the method is 0.02 % with a 100-mg sample. Soluble carbon is defined as that carbon oxidized by the sodium dichromate-sulfuric acid solution under the conditions of this method.

1.13 This method is applicable to the determination of metallic impurities in samples of boron carbide powder and pellets. From 20 to 5000 g of many of the impurities per gram of sample can be determined.

2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

C750 Specification for Nuclear-Grade Boron Carbide Powder

C751 Specification for Nuclear-Grade Boron Carbide Pellets

D1193 Specification for Reagent Water

Keywords

Boron carbide (nuclear grade); powder/pellets- chemical/mass spectrometric/spectrochemical analysis,; test,; Carbon content-nuclear materials; Mass spectrometry; Spectrochemical analysis; Trace elements content-spectrochemical analysis; boron carbide, nuclear-grade, test,; Chloride content-nuclear applications; boron carbide (nuclear-grade), byconstant-current coulometry, test,; Fluoride content; boron carbide (nuclear-grade), by ion-selective electrode, test,; Isotopic analysis; boron carbide, by mass spectrometry, test,; Trace elements content-nuclear materials; metallic impurities content, of boron carbide (nuclear-grade), test,; Water content; boron carbide (nuclear-grade), by constant voltage coulometry, test;

ICS Code

ICS Number Code 27.120.30 (Fissile materials and nuclear fuel technology)

DOI: 10.1520/C0791-83R00

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