American Society of Civil Engineers

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

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

pp. 130-136

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Document type: Conference 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 Kd model.

ASCE Subject Headings:
Waste disposal
Radioactive materials
Transport phenomena
Radioactive wastes
Clay liners
Calcium carbonate

Author Keywords:
Radioactive Wastes
Carbon--Isotopes - Clay - Nuclear Industry--Canada
Calcite-Containing Buffer Material - Carbon-14 Clay Buffer Transport - Diffusion-Reaction Equations - Nuclear Fuel Disposal