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http://dx.doi.org/10.5338/KJEA.2004.23.1.052

[ 137Cs] and 40K Activities of Foodstuffs Consumed in Jeju  

Kang, Tae-Woo (Jeju Regional Radiation Monitoring Station, Cheju National University)
Hong, Kyung-Ae (Applied Radiological Science Research Institute, Cheju National University)
Park, Won-Pyo (Faculty of Horticultural Life Science, Cheju National University)
U., Zang-Kual (Faculty of Horticultural Life Science, Cheju National University)
Publication Information
Korean Journal of Environmental Agriculture / v.23, no.1, 2004 , pp. 52-58 More about this Journal
Abstract
This work was conducted to provide the reference data of radioactivity in the foodstuffs at a radiological emergency situation in Jeju Island The sampled foodstuffs were agricultural (31), livestock (6), marine (12) and forest products (4), and processed foods (3) consumed by Jeju Islanders. $^{137}Cs$ and $^{40}K$ activities were determined by HPGe r-ray spectromety. The activity ranges of $^{137}Cs$ was fresh in the agricultural products, . fresh in the livestock, fresh in the forest, fresh in the marine and $32.0{\sim}483\;mBq/kg$. fresh in the processed foods (tea). In case of $^{40}K$ the activity was $16.6{\sim}542\;Bq/kg$. fresh in the agricultural products, $39.1{\sim}294\;Bq/kg$ fresh in the livestock, $85.5{\sim}116\;Bq/kg$ fresh in the forest, $50.1{\sim}657\;Bq/kg$ fresh in the marine, and $33.6{\sim}1,065\;Bq/kg$ fresh in the processed foods (tea). The highest activity of $^{137}Cs$, 834mBq/kg fresh was observed in oak mushroom and $^{40}K$ 1,065 Bq/kg fresh in coffee. Annual effective doses of $^{137}Cs$ and $^{40}K$ by intake of foodstuffs per capita were the following order; agricultural products (66,543 nSv) > livestock products (19,311 nSv) > processed foods (6,648 nSv) > marine products (6,579 nSv) > forest products (860 nSv). Therefore, total annual effective dose was summed 99,941 nSv which is quite low level comparing to the annual effective dose by external exposure, 2,400,000 nSv. The data obtained in this study can be useful for monitoring whether the foodstuffs are contaminated or not at an emergency radiation accident, and showed that the foodstuffs consumed in Jeju are safe in terms of annual effective dose of $^{137}Cs$ and $^{40}K$
Keywords
foodstuff; $^{137}Cs$ and $^{40}K$; radiation activity; Jeju Island; annual effective dose;
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