239+240 Pu concentrations of sediments and seawater in the coastal sea of Korea

Summary The 239+240 Pu content of the marine sediments and seawater of the costal sea of Korea was measured. In marine sediments the 239+240 Pu concentrations were in the range of 0.11-1.91 Bq/kg dry weight and in the coastal sea of Korea the ratio of 239+240 Pu/ 137 Cs was 0.27. The correlations between 239+240 Pu and 137 Cs concentrations and the content of organic matter (C, O, H, N, S) as well as the grain size of marine sediment were investigated by regression analysis. The distribution coefficient of 239+240 Pu was 1.22 . 10 5 . The 239+240 Pu concentration in seawater increased with seawater depth. However, the 137 Cs concentration in seawater did not change considerably with depth.