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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

Abstract:

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 K_d model.

Subject Headings: Clays | Radioactive wastes | Waste disposal | Transport phenomena | Saturated soils | Recycling | Radioactive materials

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