多核種高除染性空気浄化システム開発による作業被曝低減化研究 (2)メタルファイバーフィルターの除染係数測定
Development of a high efficiency multi-nuclide aerosol filters for radiation protection during a process of cutting core debris (2) Measurement of DF for Metal Fiber Filter
著者:
奈良林 直 Tadashi NARABAYASHI 石井 亮憲 Akinori ISHII 千葉 豪 Go CHIBA 山本 泰功 Yasunori YAMAMOTO 佐藤 修彰 Nobuaki SATO 増田 隆夫 Takao MASUDA
発刊日:
公開日:
Core debrisDecommissioningFiltered venting systemMulti-nuclide aerosol filtersRadiation protectionSevere AccidentsSilver Zeolite
概要
By using the FCVS technology, we had started to develop a high decontamination air cleaning system to remove multi-nuclides for radiation protection to conduct decommissioning the Fukushima NPP. High efficiency multi-nuclide aerosol filters for radiation protection during a process of cutting core debris has been developing at Hokkaido University. A plasma cutter, laser cutter, wire cutter, drilling machine, etc., will be used and will generate aerosols. Therefore, the air cleaning system should be needed for removing core debris. In order to develop an air clean up system, a metal fiver filter test was conducted. Measured DF were analyzed using FE-SEM and particle diameter analyzer was used to breakdown DF for each diameter range, It is possible to develop the high efficiency filters by mulch layer filters. Final filter system will be consisted, such as a wet-type aerosol filter, multi-stage metal fiber filters and a silver zeolite to remove organic iodine.
