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Aging Effect of Cs-137 Obtained from Cs-137 in the Kanto Loam Layer from the Fukushima Nuclear Power Plant Accident and in the Nishiyama Loam Layer from the Nagasaki A-bomb Explosion

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Title: Aging Effect of Cs-137 Obtained from Cs-137 in the Kanto Loam Layer from the Fukushima Nuclear Power Plant Accident and in the Nishiyama Loam Layer from the Nagasaki A-bomb Explosion
Authors: Ohta, Tomoko Browse this author
Mahara, Yasunori Browse this author
Kubota, Takumi Browse this author
Igarashi, Toshifumi Browse this author
Keywords: Fukushima nuclear power plant accident
cesium-137
Nagasaki A-bomb
aging effect
Kanto loam
Nishiyama loam
migration
Issue Date: Oct-2013
Publisher: Japan soc analytical chemistry
Journal Title: Analytical sciences
Volume: 29
Issue: 10
Start Page: 941
End Page: 947
Abstract: We measured Cs-134 and Cs-137 in the surface soil of the Kanto loam in the eastern Tokyo metropolitan area and the Nishiyama loam in Nagasaki, Japan. The observed Cs-137 deposition in the Kanto loam from the Fukushima nuclear power plant (NPP) accident ranged from 4.0 to 77 kBq m(-2), which corresponds to 0.3 - 5 times of that in the Nishiyama loam. The Cs-137 retardation factor in the Kanto loam obtained seven months after the Fukusima NPP accident and in the Nishiyama loam after 36 and 38 years from the detonation of the Pu atomic bomb (A-bomb) ranged from 180 to 260 and 2000 to 10000, respectively. This difference in the retardation factors is attributed to an aging effect that corresponds to seven months and 36 to 38 years after the deposition of Cs-137 occurred on the soil minerals.
Type: article
URI: http://hdl.handle.net/2115/54528
Appears in Collections:工学院・工学研究院 (Graduate School of Engineering / Faculty of Engineering) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 太田 朋子

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