Atmospheric behavior, deposition, and budget of radioactive materials from the Fukushima Daiichi nuclear power plant in March 2011

摘要: [1] To understand the atmospheric behavior of radioactive materials emitted from Fukushima Daiichi nuclear power plant after accident that accompanied great Tohoku earthquake and tsunami on 11 March 2011, we simulated transport deposition iodine-131 cesium-137 using a chemical model. The model roughly reproduced observed temporal spatial variations rates over 15 Japanese prefectures (60−400 km plant), including Tokyo, although there were some discrepancies between rates. These likely due to uncertainties in simulation emission, transport, processes A budget analysis indicated approximately 13% 22% deposited land Japan, rest was ocean or transported out domain (700 × 700 km2). Radioactivity budgets are sensitive emission patterns. Accurate estimation emissions air is important for radionuclides their subsequent water, soil, vegetation, ocean.