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Article

Estimation of Dietary Intake of Radionuclides and Effectiveness of Regulation after the Fukushima Accident and in Virtual Nuclear Power Plant Accident Scenarios

1
Department of Health Risk Communication, Fukushima Medical University School of Medicine, 1 Hikarigaoka, Fukushima 960-1295, Japan
2
Institute of Industrial Science, University of Tokyo, 5-1-5 Kashiwanoha Kashiwa, Chiba 277-8574, Japan
3
Faculty of Pure and Applied Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki 305-8577, Japan
*
Author to whom correspondence should be addressed.
Int. J. Environ. Res. Public Health 2018, 15(8), 1589; https://doi.org/10.3390/ijerph15081589
Received: 30 May 2018 / Revised: 18 July 2018 / Accepted: 24 July 2018 / Published: 26 July 2018
(This article belongs to the Special Issue Public Health Preparedness for and Response to Nuclear Disasters)
Evaluation of radiation exposure from diet is necessary under the assumption of a virtual accident as a part of emergency preparedness. Here, we developed a model with complete consideration of the regional food trade using deposition data simulated by a transport model, and estimated the dietary intake of radionuclides and the effectiveness of regulation (e.g., restrictions on the distribution of foods) after the Fukushima accident and in virtual accident scenarios. We also evaluated the dilution factors (i.e., ratios of contaminated foods to consumed foods) and cost-effectiveness of regulation as basic information for setting regulatory values. The doses estimated under actual emission conditions were generally consistent with those observed in food-duplicate and market-basket surveys within a factor of three. Regulation of restricted food distribution resulted in reductions in the doses of 54–65% in the nearest large city to the nuclear power plant. The dilution factors under actual emission conditions were 4.4% for radioiodine and 2.7% for radiocesium, which are ~20 times lower than those used in the Japanese provisional regulation values after the Fukushima accident. Strict regulation worsened the cost-effectiveness for both radionuclides. This study highlights the significance and utility of the developed model for a risk analysis of emergency preparedness and regulation. View Full-Text
Keywords: cost-effectiveness analysis; Fukushima Daiichi Nuclear Power Station accident; food; internal dose; radiation risk assessment; regulation cost-effectiveness analysis; Fukushima Daiichi Nuclear Power Station accident; food; internal dose; radiation risk assessment; regulation
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MDPI and ACS Style

Murakami, M.; Nirasawa, T.; Yoshikane, T.; Sueki, K.; Sasa, K.; Yoshimura, K. Estimation of Dietary Intake of Radionuclides and Effectiveness of Regulation after the Fukushima Accident and in Virtual Nuclear Power Plant Accident Scenarios. Int. J. Environ. Res. Public Health 2018, 15, 1589. https://doi.org/10.3390/ijerph15081589

AMA Style

Murakami M, Nirasawa T, Yoshikane T, Sueki K, Sasa K, Yoshimura K. Estimation of Dietary Intake of Radionuclides and Effectiveness of Regulation after the Fukushima Accident and in Virtual Nuclear Power Plant Accident Scenarios. International Journal of Environmental Research and Public Health. 2018; 15(8):1589. https://doi.org/10.3390/ijerph15081589

Chicago/Turabian Style

Murakami, Michio; Nirasawa, Takao; Yoshikane, Takao; Sueki, Keisuke; Sasa, Kimikazu; Yoshimura, Kei. 2018. "Estimation of Dietary Intake of Radionuclides and Effectiveness of Regulation after the Fukushima Accident and in Virtual Nuclear Power Plant Accident Scenarios" Int. J. Environ. Res. Public Health 15, no. 8: 1589. https://doi.org/10.3390/ijerph15081589

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