Development of an Organic Iodine Filter Design and Performance Improvement of Filtered Containment Venting System

Abstract

Performance tests were conducted for Filtered Containment Venting System to verify the decontamination factor for aerosol in a high temperature steam flow. The test results confirms that the filter used in this system achieves a decontamination factor larger than 1000. In addition, a filter to capture organic iodine was developed in this study using silver zeolite. Absorption performance of silver zeolite was tested. And the results demonstrated that the newly developed filter's decontamination factor for methyl iodide is larger than 50 and the filter has enough absorption capacity for organic iodine generated in severe accidents. The filtered containment venting systems with organic iodine filters developed in this study was installed at Kashiwazaki Kariwa Nuclear Power Station.