Abstract
In a core melting accident of a reactor, the release of radioactive material into the environment is inevitable. The amount of effective dose received by people around these facilities and consequently the urgent protective action zone (UPZ) strongly depend on the climatic conditions at the time of the accident and afterwards. In this study, the effect of wind speed, air stability class, temperature, and rainfall on the total effective dose equivalent (TEDE) at different time/place intervals of a hypothetical partial core melt accident around a research reactor was investigated using simulation method. The results showed that the stability class E, warm temperature, and light rain could lead to the highest dose of individuals. In addition, very low wind speeds were recommended for the facilities located in cities with high density of high-rise buildings and/or tropical areas in this regard.
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