A Preliminary Model for Carbon-14 Transport in a Clay Buffer

by Nava C. Garisto, Atomic Energy of Canada Ltd, Canada,
Frank Garisto, Atomic Energy of Canada Ltd, Canada,

Document Type: Proceeding Paper

Part of: High Level Radioactive Waste Management 1990


A model has been developed to assess the effect of calcite dissolution and precipitation reactions on the transport of 14C through a saturated, calcite-containing buffer material. The model has been used to calculate 14C concentrations in the buffer for an exponentially decreasing release pulse. Preliminary results show that the calcite reactions retard the transport of 14C in the buffer. Moreover, for the system parameters used in this study, it is shown that the long-term effects of calcite can be adequately simulated by an equivalent Kd model.

Subject Headings: Carbon | Clays | Simulation models | Clay liners | Calcium carbonate | Precipitation | Parameters (statistics) | Radioactive wastes

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