Analysis of ground deposition of radionuclides under different wind fields from the Fukushima Daiichi accident

Jiansong Wu (), Xiaofeng Hu, Jinyu Ma, Can Zhang and Shuaizi Mojia
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Jiansong Wu: China University of Mining and Technology
Xiaofeng Hu: People’s Public Security University of China
Jinyu Ma: China University of Mining and Technology
Can Zhang: China University of Mining and Technology
Shuaizi Mojia: People’s Public Security University of China

Natural Hazards: Journal of the International Society for the Prevention and Mitigation of Natural Hazards, 2017, vol. 87, issue 1, No 25, 533-544

Abstract: Abstract The relationship between ground deposition of radionuclides and wind fields from the Fukushima Daiichi accident was investigated using the weather research and forecasting/chemistry model with the improvements by adding the radioactive decay process, dry and wet deposition parameterizations. To examine this correlation, wind fields near Fukushima Daiichi nuclear power plant (FDNPP) were defined as four different types mainly based on the wind direction, and the contaminated land areas were classified to five levels. The results showed that the distribution of the ground deposition of the radionuclides is mainly determined by the wind field rather than the precipitation distribution; Northeast wind has the largest contaminated land areas, and it is considered to much more easily accelerate the transport of radionuclides than any other wind direction near the FDNPP. It was also indicated by the results that in terms of high contaminated land area (>100 Bq/m2), total ground deposition is dominated by dry deposition for 131I, and by wet deposition for 137Cs.

Keywords: Radionuclides; Ground deposition; Wind field; Fukushima Daiichi; WRF/Chem (search for similar items in EconPapers)
Date: 2017
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DOI: 10.1007/s11069-017-2777-7

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