AI Article Synopsis
- The study examines the high costs of radiation decontamination in Fukushima and its unclear impact on long-term radiation exposure in evacuation zones.
- It assesses the effectiveness of decontamination efforts and identifies key factors for estimating cumulative radiation doses over periods of 15, 30, and 70 years.
- The research highlights the importance of the external exposure conversion coefficient (EeCC) in determining areas with significant radiation levels post-decontamination, suggesting further investigation into this parameter in Japan.
Article Abstract
Despite the enormous cost of radiation decontamination, there has been almost no quantitative discussion on how much it would reduce the long-term external radiation exposure in the Evacuation Zone and Planned Evacuation Zone (restricted zone) in Fukushima. The aim of this study is to assess the effectiveness of decontamination and return options and to identify important parameters for estimating the long-term cumulated effective dose (CED) during 15, 30 and 70 year period using data on land-use, population and decontamination in the restricted zone (about 1100 km(2)) in Fukushima. Decontamination of the land is assumed to have a certain efficacy in terms of the reduction of CED. The EeCC (external exposure conversion coefficient) is the parameter having the greatest effect on the percentage of area having CED during the 30 years above 100 m Sv after decontamination, ranging from 13% (EeCC=0.2) to 55% (EeCC=0.6). Therefore, we recommend a detailed investigation of the EeCC in Japan.
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| http://dx.doi.org/10.1016/j.chemosphere.2013.06.083 | DOI Listing |
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