Characterization of 241Am and 134Cs bioaccumulation in the king scallop Pecten maximus: investigation via three exposure pathways

► We determined Am and Cs uptake and depuration kinetics following seawater, food and sediment exposures. ► We determined radionuclide tissue distribution after exposure and after depuration periods. ► Am was mainly associated to the shell whatever the exposure pathway was. ► Transfer processes occurred between soft and hard tissues for Am.