ASTM C1022-17(2022)

Overview

ASTM C1022-17(2022): Standard Test Methods for Chemical and Atomic Absorption Analysis of Uranium-Ore Concentrate provides comprehensive procedures for analyzing the chemical composition and impurities in uranium-ore concentrates. These standardized test methods allow laboratories to determine whether uranium-ore concentrates meet the requirements defined in ASTM Specification C967, ensuring product quality and regulatory compliance across the nuclear materials industry.

The standard addresses the unique challenges posed by variable uranium-ore matrices and the often limited availability of suitable calibration materials. It emphasizes the need for each laboratory to establish and document its own precision and bias for these methods based on their specific equipment and reference materials.

Key Topics

• Test Methods and Analytical Procedures

  • Uranium determination via ferrous sulfate reduction and potassium dichromate titrimetry
  • Measurement of nitric acid-insoluble uranium
  • Detection of extractable organic materials
  • Quantitation of impurities such as arsenic, halides, carbonate, fluoride, phosphorus, silicon, thorium, calcium, iron, magnesium, molybdenum, titanium, vanadium, potassium, sodium, and boron

• Instrumental Techniques

  • Use of chemical and atomic absorption spectrophotometry for trace elements
  • Application of X-ray fluorescence and emission spectroscopy where available
  • Procedures utilizing photometric and gravimetric analysis

• Lab-Specific Precision and Bias

  • Laboratories must validate method performance with their own reference materials
  • Provided precision and bias values are to be used as guidelines

• Safety and Regulatory Compliance

  • Emphasis on establishing and following appropriate safety, health, and environmental practices
  • Compliance with international standardization principles and WTO Technical Barriers to Trade (TBT) guidelines

Applications

The ASTM C1022-17(2022) standard is crucial in the following fields:

• Nuclear Fuel Processing: Ensures that uranium-ore concentrates used as feed for conversion and enrichment facilities meet stringent quality specifications.
• Quality Control: Supports manufacturers and testing laboratories in verifying the elemental composition and impurity levels of uranium-ore concentrates.
• Regulatory Reporting: Facilitates compliance with national and international regulations governing the nuclear fuel cycle.
• Reference Analysis: Provides methodologies to laboratories developing or validating internal chemical, atomic absorption, and instrumental analysis protocols for uranium compounds.
• Research & Development: Serves as a reference for analytical chemistry R&D involving uranium-ore concentrates and associated materials.

Related Standards

For a complete quality assurance program for uranium materials and their analysis, laboratories and industry professionals often refer to other ASTM standards, including:

• ASTM C967: Specification for Uranium Ore Concentrate – Defines the required chemical and physical properties for uranium-ore concentrates.
• ASTM C859: Terminology Relating to Nuclear Materials – Clarifies definitions and nomenclature.
• ASTM C761: Test Methods for Chemical, Mass Spectrometric, Spectrochemical, Nuclear, and Radiochemical Analysis of Uranium Hexafluoride.
• ASTM C1254: Test Method for Determination of Uranium in Mineral Acids by X-Ray Fluorescence.
• ASTM C1267: Test Method for Uranium by Iron (II) Reduction in Phosphoric Acid Followed by Chromium (VI) Titration in the Presence of Vanadium.
• ASTM C1287: Test Method for Determination of Impurities in Nuclear Grade Uranium Compounds by ICP-MS.
• ASTM C1347: Practice for Preparation and Dissolution of Uranium Materials for Analysis.
• ASTM D1193: Specification for Reagent Water.
• ASTM E60: Practice for Analysis of Metals, Ores, and Related Materials by Spectrophotometry.

Practical Value

Adhering to ASTM C1022-17(2022) promotes uniformity, reliability, and comparability in uranium-ore concentrate analysis. This standard enables testing laboratories, nuclear fuel producers, and regulators to maintain high standards of safety, operational efficiency, and product integrity throughout the nuclear supply chain. By following these internationally recognized methods, stakeholders ensure robust data for quality control, certification, and regulatory documentation of uranium-ore concentrate products.