Resuspension of radioactive cesium from soil and forest

Kazuyuki KITA; Misako TANAKA; Takeshi KINASE; Haruka FUJISAWA; Ryusuke YAMAGUCHI; Himiko KINO; Hiroyuki DEMIZU; Yasuhito IGARASHI; Masao MIKAMI; Kouji ADACHI; Naohiro YOSHIDA; Sakae TOYODA; Keita YAMADA; Atsushi SHINOHARA; Kazuhiko NINOMIYA; Hiroshi OKOUCHI; Masahide ISHIZUKA; Hiroto KAWASHIMA; Izumi NAKAI; Zenya ABE; Yuichi ONDA

Presentation information

Oral

Symbol M (Multidisciplinary and Interdisciplinary) » M-AG Applied Geosciences

[M-AG38_2AM1] Dynamics of radionuclides emitted from Fukuchima Dai-ichi Nuclear Power Plant in the environment

Fri. May 2, 2014 9:00 AM - 10:45 AM 501 (5F)

Convener:*Kazuyuki Kita(Faculty of Science, Ibaraki University), Yuichi Onda(Center for Research on Isotopes and Environmental Dynamics, University of Tsukuba), Teruyuki Nakajima(Atmosphere and Ocean Research Institute), Yasuhito Igarashi(Atmospheric Environment and Applied Meteorology Research Department, Meteorological Research Institute), Jun Matsumoto(Deaprtment of Geography, Tokyo Metropolitan University), Masatoshi Yamada(Institute of Radiation Emergency Medicine, Hirosaki University), Chisato Takenaka(Graduate School of Bioagricultural Sciences, Nagoya University), masayoshi yamamoto(Low Level Radioactivity Laboratory, Kanazawa University), jota kanda(Tokyo University of Marine Science and Technology), atsushi shinohara(Osaka university), Chair:Kazuyuki Kita(Faculty of Science, Ibaraki University)

10:00 AM - 10:15 AM

[MAG38-05] Resuspension of radioactive cesium from soil and forest

*Kazuyuki KITA¹, Misako TANAKA¹, Takeshi KINASE¹, Haruka FUJISAWA¹, Ryusuke YAMAGUCHI¹, Himiko KINO¹, Hiroyuki DEMIZU¹, Yasuhito IGARASHI², Masao MIKAMI², Kouji ADACHI², Naohiro YOSHIDA³, Sakae TOYODA³, Keita YAMADA³, Atsushi SHINOHARA⁴, Kazuhiko NINOMIYA⁴, Hiroshi OKOUCHI⁵, Masahide ISHIZUKA⁶, Hiroto KAWASHIMA⁷, Izumi NAKAI⁸, Zenya ABE⁸, Yuichi ONDA⁹ (1.Ibaraki University , 2.MRI , 3.TiTech , 4.Osaka Univ. , 5.Waseda Univ. , 6.Kagawa Univ., 7.Akita Pref. Univ. , 8.Tokyo univ. of Science , 9.Tsukuba Uinv)

Radionuclides emitted from the Fukushima dai-ichi nuclear power plant (FNDPP) accident have been deposited on the soil, ocean and vegetation. Re-suspension of radioactive cesium from the soil and vegetation to the atmosphere may be one of signi?cant path in the diffusion of radionuclides after the accident. Therefore, the quantitative understanding of these re-suspensions is important to understand future transition of radionuclides. Identification of aerosol species which bring Cs-134/137 is necessary to understand the mechanism of re-suspension, and its efficiency. We have measured atmospheric concentration of radiation by Cs-134/137 in Namie high school Tsushima-branch where is away 30km from FNDPP. Relationship between Cesium radioactivity and aerosol size destribution show that multiple re-suspension mechanisms contribute and their contribution varies with the season. The mechanisms of re-suspension will be shown and discussed.