Abstract

Burial of hazardous nuclear waste in geological repositories is considered to be in the best environmental interest. However, to minimize potential risk for future generations, an accurate knowledge is required of the time- and space-dependent concentrations of the radionuclides as they migrate from their burial site. Numerical solutions to both the conventional advection-dispersion equation and a new transport equation (containing directional dependence) are utilized to study the migration of radionuclides in heterogeneous media. In particular, layered fractured formations are examined. The new transport formulation, with its directional dependence, yields details in concentration profiles not shown by the advection-dispersion approach.

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