Depth distribution of239,240Pu and137Cs in soils of South Korea |
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| Authors: | M H Lee C W Lee K H Hong Y H Choi B H Boo |
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| Institution: | (1) Environmental Assessment Division, Korea Atomic Energy Research Institute, 305-353 Taejon, (South Korea);(2) Department of Chemistry, Chungnam National University, 305-764 Taejon, South Korea;(3) Center for Molecular Science, 373-1 Kusung-dong, Yusung-gu, 305-701 Taejon, (South Korea) |
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| Abstract: | Depth distribution of239,240Pu and137Cs in the soils of South Korea have been studied. The average accumulated depositions were estimated roughly to be 54.8±32.1 Bq·m–2 for239,240Pu, 1.6±1.0 Bq· ·m–2 for238Pu and 1982.8±929.1 Bq·m–2 for137Cs. The activity ratios of239,240Pu/137Cs in soils were found to be in the narrow range of 0.0153 to 0.0364 with a mean value of 0.0230±0.006. The concentrations of239,240Pu and137Cs in soils decrease exponentially with increasing the soil depth. A significant correlation was found between the concentration of239,240Pu and that of137Cs. The activity ratios of239,240Pu/137Cs tend to increase slightly with increasing soil depth. |
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