大亚湾海洋沉积物的人工放射性核素

ACTIVITIES OF ARTIFICIAL RADIONUCLIDES IN SEDIMENTS OF DAYA BAY

对大亚湾核电站邻近海的海洋沉积物中人工放射性核素^(144)Ce,^(103)Ru,~88Rn,^(85)Sr,^(90)Sr,^(134)Cs,^(137)Cs,^(124)Sb,^(54)Mn,^(60)Co进行了调查研究;得到核素的区域变化规律和与沉积物性质的相互关系,以及获得各核素的分配系数(K_d)。

Activities of artificial radionuclides in offshore sediment of Daya Bay have been investigated. According to the values in six stations,the regional distribution and variation of these radionuclides'(144Ce, 103Ru,106Rh,85Sr,90Sr,134Cs,137Cs,124Sb,54Mn and 60Co) activities are discussed. The relationship of these ra-dionuclides'activities with composition of sediments is also discussed. The distribution coefficients(Kd) of these radionuclides determined are in following series according to magnitude:54Mn>134Cs>103Ru>60Co >, 106Rh> 137Cs, 144Ce, 124Sb>85Sr>90Sr.