ISO 24953:2026

Overview

ISO 24953:2026 - Textiles - Determination of iodine isotope adsorption efficiency of activated carbon fibre provides an internationally recognized method for testing the adsorption efficiency of activated carbon fibres (ACF), such as nonwoven fabrics or fibrous felt with a thickness of less than 20 mm. This standard is intended to measure the ability of ACF materials to adsorb and remove radioactive iodine isotopes (notably Iodine-131) from air or exhaust gas flows. As concerns about airborne radioactive contaminants grow, reliable and standardized testing of adsorption materials becomes crucial for textile, filtration, and environmental applications.

Key Topics

• Scope and Relevance: Specifies test methods for evaluating the performance of activated carbon fibre textiles used in filtration systems, especially for radioactive iodine isotope removal.
• Test Procedure:
  • Preparation of test specimens from nonwoven or fibrous activated carbon fabrics.
  • Packing into standardized canisters and ensuring tight, gap-free arrangements.
  • Exposure to controlled air or gas streams containing a quantified amount of Iodine-131 isotope.
  • Measurement of adsorption efficiency and penetration using gamma-ray detection methods.
• Safety Requirements:
  • Strict laboratory safety protocols when handling radioactive materials.
  • Air conditioning systems equipped with appropriate filtration and radiation shielding.
  • Personal monitoring and compliance with international radiation protection guidelines.
• Data Reporting and Uniformity:
  • Consistent specimen geometry and packing for reproducibility.
  • Reporting requirements outlined to support transparency and comparability.

Applications

• Nuclear Facilities and Environmental Monitoring: Essential for testing and selecting ACF materials used in air purification systems, exhaust treatment units, and protective gear at nuclear power plants or laboratories.
• Textiles and Filtration Manufacturers: Enables manufacturers to benchmark and certify their products’ performance for radioactive iodine isotope removal, supporting claims for use in safety-critical or environmental control products.
• Quality Control and Regulatory Compliance: Supports regulatory bodies and industries in verifying compliance with environmental and occupational safety standards where radioactive iodine exposure is a concern.
• Research and Product Development: Offers a standardized method for researchers and material scientists to develop, compare, and improve new forms of activated carbon fibre with enhanced filtration properties.

Related Standards

• ASTM D3803-91: Standard Test Method for Nuclear-Grade Activated Carbon-referenced for sampling procedures and comparative testing with granular activated carbons.
• IAEA Safety Standards: Guidelines for handling radioactive materials, as referenced for laboratory safety protocols.
• ISO/TC 38 Standards: Other ISO standards under Technical Committee 38 for textiles, relevant for broader material testing and specification.

Keywords: ISO 24953, activated carbon fibre, iodine isotope adsorption, textiles, Iodine-131 removal, air filtration, radioactive gas purification, test method, adsorption efficiency, international standard, textile filtration, environmental monitoring.

Practical Value: ISO 24953:2026 assures the reliability and comparability of results when evaluating the effectiveness of activated carbon fibre materials for filtering radioactive iodine isotopes from the air. This standard helps industries implement best practices and meet strict environmental and safety requirements across various high-risk sectors.