Abstract: In order to meet the needs of iodine adsorber in the ventilation system of nuclear facilities with confined space or small air flow rate, an elliptical iodine adsorber was designed. The internal flow field simulation analysis and overall performance test of the iodine adsorber were carried out. The experimental results show that the internal air flow distribution in the iodine adsorber is uniform, the structural design is reasonable, the volume is small, the weight is light, and the connection with the system is convenient and fast. Under the flow rate of 300 m³/h , the resistance is less than 300 Pa, the mechanical leakage rate is less than 0.01%, and the adsorption efficiency of the adsorber of radioactive methyl iodine is more than 99.99%. It generally meets the purification and treatment requirements of specified application of nuclear facility, and the engineering application is realized.

Key words: confined space, small air volume, iodine adsorber, convenient and fast, adsorption efficiency