Abstract
Water radiolysis is of great concern in the concept of final disposal of nuclear waste in geological formations. In this paper, a model is developed for radiation energy deposition and its consequences to water radiolysis. The model concepts are based on radiation energy deposition in the porewater and other constituents of a uranium ore (the Cigar Lake uranium deposit). Radiation is randomly generated within grains of uranium minerals in the ore, by the Monte Carlo method. The radiation energy is then allowed to deposit into the various constituents of the ore. The fraction of the total radiation energy absorbed by water is obtained, and the oxidant production rate is calculated with G-values of water. When back-reactions of the oxidants and reductants projected by other researchers in similar systems are accounted for, the calculated oxidant production rate is in agreement with that predicted by mass transport models.
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