||Consideration of the marine Kd and the exchangeable fraction: the case of 90Sr and 137Cs
Uchida, ShigeoTagami, Keiko
Sediment-seawater distribution coefficient (Kd) for radionuclides based on field observations are limited. Thus IAEA provided Kd data derived from stable element data in sediment and seawater concentrations, assuming that exchangeable fraction in sediment was 20% for ocean margin for all elements. This assumption may be acceptable; however, it is still necessary to check the exchangeable fraction of important radionuclides for more precise modeling of dose assessment. In this study, therefore, we focused on global fallout 90Sr and 137Cs data obtained coastal area in Japan and compared the data with stable elements.