SIMULATION OF THE UNDERGROUND MIGRATION OF NUCLIDES FROM RADIOACTIVE-WASTES

A model study of the underground migration of Ce-144(III) from radioac tive wastes in an homogeneous environment (clinoptilolit) has been und ertaken and compared with an earlier one treating the dispersion of Pu -239(II) in clay. For this purpose pertinent software has been develop ed. The adsorption capacity and the distribution coefficients for the system Ce/clinoptilolit, as well as some hydraulic parameters needed f or the simulation, have been assessed or determined experimentally. Th e calculated migration rates of Ce-144 and Pu-239 have been compared. Copyright (C) 1997 Elsevier Science Ltd.