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Spent nuclear fuel, which is used in nuclear power plants, contains useful fissile material such as plutonium. Spent nuclear fuel is stored in spent nuclear fuel interim storage facility until it is re-processed. Spent nuclear fuel interim storage facility is built in coastal and is designed to provide natural cooling. Behavior evaluation of sea salt particles (Environmental contamination factor) is important for facility design. In this study, we developed a new measurement device for flying sea salt amount, replacing the dry gauze method that is defined JIS have been conventionally used. The new measuring device was confirmed experimentally, to have a better performance than dry gauze method. By using the new measurement device, we measure the relationship between the flying sea salt amount and the distance from the shoreline. We confirm the amount of flying sea salt particles is reduced with increasing distance from the shoreline, and it is increased with increasing height from the sea level. |
