Development of High Efficiency Filtered Containment Venting System by using AgX

2014 Fiscal Year Final Research Report

• Project/Area Number: 24360388
• Research Category: Grant-in-Aid for Scientific Research (B)
• Allocation Type: Partial Multi-year Fund
• Section: 一般
• Research Field: Nuclear engineering
• Research Institution: Hokkaido University
• Principal Investigator: NARABAYASHI Tadashi 北海道大学, 工学(系)研究科(研究院), 教授 (10419947)
• Co-Investigator(Kenkyū-buntansha): SATO Masanobu 東北大学, 多元物質科学研究所, 教授 (70154078) ; TSUJI Masashi 北海道大学, 大学院工学研究院, 特任准教授 (70091478) ; CHIBA Go 北海道大学, 大学院工学研究院, 准教授 (50421524)
• Project Period (FY): 2012-04-01 – 2015-03-31
• Keywords: 放射性物質飛散防止 / 高性能フィルター / 銀ゼオライト / 蒸気・水二相流 / メチルヨウ素 / 小児甲状腺癌防止 / 世界最高除染性能 / 過酷事故対策

Outline of Final Research Achievements

From the lessons of TMI and Chernobyl Accidents, filtered containment venting system (FCVS) and Containment vessel spray cooling system are enforced in the the New Regulatory Requirement, by using mobile generators and heat exchangers to keep the ultimate heat sink even in any natural disaster, such as large earthquake, big tsunami etc. In this study we have succeeded to develop high decontamination factor FCVS that used Silver Zeolite named AgX. Hokkaido University has tested wet type FCVS using venturi scrubber in hot water pool and dry type FCVS using metallic fiber filter for 1st stage and AgX for 2nd stage, generating super heat steam by using multi-stage orifice. Tohoku University succeeded to use silver doped zeolite (AgX) which is a promising sorbent for CH3I can remove over 99.99%. The results are the 1st class high decontamination factor and applied to actual Nuclear power plants in Japan.

Free Research Field

原子炉工学、原子炉安全工学、気液二相流