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The Aerial radiation monitoring in Japan after the Fukushima Daiichi Nuclear Power Plant accident

発電所事故後の航空機モニタリング

眞田 幸尚 ; 杉田 武志; 西澤 幸康; 近藤 敦哉*; 鳥居 建男

Sanada, Yukihisa; Sugita, Takeshi; Nishizawa, Yukiyasu; Kondo, Atsuya*; Torii, Tatsuo

福島第一原子力発電所の災害により放出された放射能の日本全域に対する影響を調査するために、周辺線量当量率と放射性セシウムの沈着量について、ヘリコプターを用いて測定した。その結果、放射性セシウムの沈着量の分布が得られ、汚染の範囲は、東北南部から関東まで及んでいることが明らかになった。

The ambient dose-rate and the deposition concentration of radioactive cesium was measured by using helicopters in the whole area of Japan to investigate the influence of the radioactivity that released in the atmosphere due to the disaster of the Fukushima Daiichi NPP (Nuclear Power Plant), Tokyo Electric Power Company (TEPCO), occurred by the East Japan earthquake and tsunami on March 11, 2011. As a result, the deposition of radioactive cesium on the ground discharged from the Fukushima Daiichi NPP was obtained, and it was clarified that the scattered range of the cesium had been almost limited from the southern part of Tohoku to Kanto areas. The variation distribution of the dose-rate of Japan was also revealed in this measurement.

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