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※ 半角英数字
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これまでの除染の状況と今後について

About the situation of decontamination and the future

山下 卓哉

Yamashita, Takuya

原子力機構は、復興を進める国や自治体への情報提供を目的に除染シミュレーションと将来の空間線量率の予測を行っている。除染シミュレーションには「除染活動支援システムRESET」を用い、除染後の空間線量率の予測には「空間線量率減衰の2成分モデル」を用いている。「空間線量率減衰の2成分モデル」は、除染後の測定データを対象とした確認が十分に行われていないため、除染後のエリアに対する適用性の検証を行った。環境省が実施した除染モデル実証事業後の空間線量率の追跡調査結果と2成分モデルによる予測はパラメータのバラツキの範囲で良く合うことから、2成分モデルを除染後の空間線量率の予測に適用することに問題はないと判断される。

JAEA has been conducting decontamination simulations and calculating the future air dose rates for the purpose of providing information to the government and local governments that are in the process of reconstruction. The restoration support system for environment "RESET" is used for decontamination simulation, and "two component model of air dose rate attenuation" is used for prediction of future air dose rate after decontamination. Since the "two-component model of air dose rate attenuation" has not been sufficiently confirmed for the measurement data after decontamination, the applicability to the area after decontamination was verified. Since the prediction by the two-component model has good agreement with the measured air dose rate after the decontamination model demonstration project conducted by the Ministry of the Environment and the variation of the parameters, it is judged that there is no problem in applying to prediction.

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