Simulation of the migration of Sr-85 in chinese loess under artificial rainfall condition

A five-year cooperative research project between China Institute for Radiat ion Protection (CIRP) and Japan Atomic Energy Research Institute (JAERI) on establishment of methodology for safety assessment of shallow land disposa l of low-level radioactive wastes (LLRW) had been conducted since 1988. Thi s paper describes the simulation of the migration of Sr-85 in Chinese Loess under artificial rainfall condition at the CIRP's field test site by NESOR , a numerical model considering nonequilibrium sorption. FEMWASTE was used to verify the simulation results of NESOR. The results show that the sorpti on at the surface of loess media may be controlled by a nonequilibrium sorp tion.