Characteristics of dose rate distribution caused by the accidents of Fukushima Daiichi Nuclear Power stations

Akihiko Kondoh; Hidetoshi Yamaguchi; Toshio Hayakawa; Ryosuke Shimojo

doi:10.14866/ajg.2011f.0.100019.0

Annual Meeting of the Association of Japanese Geographers, Autumn 2011

Session ID : P737

DOI https://doi.org/10.14866/ajg.2011f.0.100019.0

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Host: The Association of Japanese Geographers

Characteristics of dose rate distribution caused by the accidents of Fukushima Daiichi Nuclear Power stations

*Akihiko Kondoh, Hidetoshi Yamaguchi, Toshio Hayakawa, Ryosuke Shimojo

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Keywords: Fukushima Daiichi Nuclear Power Stations, radioactive material, dose rate mapping, observation system, effect of topography

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Abstract

Distribution of the dose rate caused by the accidents of Fukushima Daiichi Nuclear Power stations is measured by gamma ray spectrometer with GPS onboard a car. Driving route is selected on the branch roads and forestry roads, and detailed dose rate distribution is obtained around Date, Iitate, Kawamata and Fukushima areas. The dose rate distribution is strongly dependent on the topography. In Iitate and Kawamata region, south-east faced slope has high dose rate. The ridge between Abukuma watershed and Pacific ocean watershed make clear boundary between high and low dose rate distribution.

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