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In the event of nuclear accident in neighboring countries, radioactive materials may enter the country due to the effect of wind. In order to analyze the impact of nuclear accident in neighboring countries, we simulate model about Tianwan nuclear power plant accident in China. The Cs was selected as the target radionuclides and The HYSPLIT 4 model of the NOAA and meteorological data which provided by NOAA/ARL were used to analyze the diffusion effect of Cs and the effect of radionuclide fallout. 6 scenarios were developed to examine the effect of emission time of Cs at a nuclear power plant accident and the effect of rainfall. As the simulation results showed that the higher the emission time, the higher was the concentration of Cs present in the atmosphere and on the ground. Based on the calculation of the Cs deposition rate (%) from Scenario I and Scenario II, it was found that the rainy season during the simulation period was deposited at a higher rate than during the dry season.

daehan hwan'gyeong gonghag hoeji/daehan hwan-gyeonggonghakoeji

Characteristics of Influence of Domestic Radioactivity due to the Accident in a Nuclear Power Plant in a Neighboring Country - Focus on river and dam basin -