RADIONUCLIDE MIGRATION IN AQUIFER ROCKS - EFFECT OF WATER-ROCK INTERACTION

The effects of water-rock interaction and transport mechanism on the l imits of radionuclide migration through aquifer rocks are considered. The consideration is based on an analysis of analytical solutions of s imultaneous differential equations that describe radioactive decay, in filtration and diffusion transport of radionuclides, and radionuclide fixation on rock minerals and takes into account the kinetics of water -mineral radionuclide exchange reactions. The model is applied to calc ulate the limits of Sr-90 and Cs-137 migration.