Environmental Remediation of the difficult-to-return zone in Tomioka Town, Fukushima Prefecture.

ABSTRACT: Temporal variations in ambient dose rates in a restricted area designated as "difficult-to-return" for residents of Tomioka Town, Fukushima Prefecture were evaluated in a car-borne survey during 2018-2019. The median dose rates in the "Decontaminated area" in the difficult-to-return zone decreased rapidly from 1.0 μSv/h to 0.32 μSv/h; however, the median dose rates in the "Non-decontaminated area" and "Radioactive waste storage area" fluctuated between 1.1-1.4 μSv/h and 0.46-0.61 μSv/h, respectively. The detected rate of the cesium-137 (¹³⁷Cs) (¹³⁷Cs-detected points per all measuring points) in the "Decontaminated area" also decreased rapidly from 64% to 6.7%, accompany with decreasing in ambient dose rates. On the other hand, the detection of ¹³⁷Cs in the

SUBMITTER: Cui L 

PROVIDER: S-EPMC7311413 | biostudies-literature | 2020 Jun

REPOSITORIES: biostudies-literature