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Standards Development
This document provides basic regulations for adsorption efficiency testing methods using radioactive methyl iodine in activated carbon fibres used to adsorb and remove radioactive isotopes (I131) contained in air or gas flow (exhaust). This test method is used to evaluate the adsorption efficiency of radioactive isotopes leaked from nuclear facilities, hospitals, and companies handling radioactive substances, etc.
• The activated carbon fibre is known to have better efficiency in adsorbing radioactive materials such as I131, Cs137, Sr90 at higher efficiency than granular activated carbon.
• Existing standards are suitable for evaluating the adsorption efficiency of granular activated carbon, but it is difficult to determine the exact adsorption efficiency when applied to activated carbon fibres (sheet,clushed,etc.) of different shapes.
•Activated carbon fibre and activated carbon have the same purpose, but differ in manufacturing method, shape, physical and chemical characteristics, and application method. Therefore, in order to apply activated carbon fibre as a substitute, the sample preparation method, test apparatus dimension, packing method, test conditions and test procedure, etc. must be changed
• Reliable results comparing mutual adsoption efficiency are produced to help consumers choose.
• Activated carbon fibre, a new key engine of the Fourth Industrial Revolution, is in the spotlight in health, safety, and the environment. Activated carbon fibre is projected to dominate the adsorbent market with an average annual growth of 7.7% by 2030
•In addition to general-purpose adsorption, the main markets for potential special uses of activated carbon fibre are adsorption and removal of radioactive materials from nuclear power plants, hospital and plant/facilities.
• International standards for iodine isotope adsorption efficiency testing methods for sheet-type activated carbon fibres are expected to contribute to the activation of equipment, systems and related industries considering replacement with activated carbon fibres.
Activated carbon fibres have excellent adsorption performance and long-term usability, thereby reducing the amount of radioactive waste generated.
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