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  • 1 Cheju National University Department of Marine Environmental Engineering, College of Ocean Sciences Cheju Korea
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To examine inshore radioactive contamination caused by nuclear power plants, both gross -radioactivity and -spectrometry was measured. The measurements were taken with the sea mussels, Mytilus coruscus and Mytilus edulis, which had been collected from the four different sites of nuclear power plants (Kori, Ulchin, Wolsong, and Younggwang), and Cheju-do as a control site. As a result, the gross -radioactivity observed was similar to that in nature. Among radionuclides, only137Cs,20K,7Be and60Co were detected in a very small amount, and each was also close to the natural levels.