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초록

A survey on the presence of radioactivity was conducted in foods distributed
during the four years from 2014 to 2017, focusing on items likely to be contaminated
or objects of customer concern. Tests of 509 food products from supermarkets and
traditional markets in Seoul found that 495 were free of radioactive material(137Cs, 134Cs,
131I), and that radioactivity levels were between 906.1 Bq/kg and 0.6 Bq/kg of 137Cs in
14(2.8%) cases. The detection items were mushrooms(Shiitake mushroom, neungi
mushroom, sanghwang mushroom), perilla seed, bracken, cashew nuts, hazelnut and
blueberry preserves. Neungi mushroom imported from China had 906.1 Bq/kg of 137Cs,
which was more than nine times higher than the standard. Among the 14 such products,
13 were imported from Europe, China, North Korea, and India, and one shiitake
mushroom was produced locally. The study found that radioactivity was highly
detectable in berries, blueberry, nuts, and bracken, and the detection rate for import