Japan Geoscience Union Meeting 2018

Presentation information

[EJ] Poster

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

[M-AG33] Dynamics of radionuclides emitted from Fukuchima Dai-ichi Nuclear Power Plant in the environment

Sun. May 20, 2018 3:30 PM - 5:00 PM Poster Hall (International Exhibition Hall7, Makuhari Messe)

convener:Kazuyuki Kita(Faculty of Science, Ibaraki University), Yuichi Onda(Center for Research on Isotopes and Environmental Dynamics, University of Tsukuba), SHINOHARA ATSUSHI(大阪大学, 共同), Daisuke Tsumune(Central Research Institute of Electric Power Industry)

[MAG33-P10] Experimental study on emission mechanism of shiitake mushroom spore - Shape characteristics of spore particles -

Ishizuka Masahide1, *Kuniaki Tanaka1, Yasuhito Igarashi2, Kentaro Hosaka3, Kazuyuki Kita4 (1.Kagawa University, 2.Meteorological Research Institute, 3.National Museum of Nature and Science, 4.Ibaraki University)

Keywords:Secondary emission, FDNPP accident, Particle Image Velocimetry

Huge amount of radioactive materials was emitted to natural environment by FDNPP accident and those were deposited on forest and soil grounds. Recent study shows the concentration of radiocesium in atmosphere increases in summer in mountain area in Namie town, Fukushima prefecture. For this reason, gene analysis clarified the contaminated mushroom spores cause such seasonal variation. In order to consider the long-term effect on human health, evaluations of the amount of emitted spore and characteristics of its seasonal variation is important. However, there are few study focus on the emission mechanism of spore. In this study, particle size and shape of a shiitake mushroom are measured in laboratory. The results show the area equivalent particle diameter of fresh spore and dry spore are 4.44±0.35 µm and 3.93±0.94 µm, respectively. The shape of fresh spore is oval and the length of long axis is about 1.5 times longer than that of short axis.