A model for the influence of steel corrosion products on nuclear fuel corrosion under permanent disposal conditions
نویسندگان
چکیده
A model was developed to determine the influence of steel corrosion products on a-radiolytic corrosion of spent nuclear fuel inside a failed waste container. The model takes into account the a-radiolysis of water, the reaction of radiolytic H2O2 with UO2 both directly and via galvanic coupling with noble metal particles, the reaction with H2 via galvanic coupling, and the Fenton reaction. The dominant redox control agent was found to be H2, and the critical H2 concentrations required to completely suppress fuel corrosion were calculated. The ability of Fe to scavenge H2O2 had only a minor influence on fuel corrosion processes. 2012 Elsevier Ltd. All rights reserved.
منابع مشابه
An improved model for the corrosion of used nuclear fuel inside a failed waste container under permanent disposal conditions
An improved model for nuclear fuel corrosion inside a failed waste container has been developed. The model considers the influence of the a-radiolysis products using a full radiolytic reaction set, and demonstrates that H2O2 is the dominant oxidant. Corrosion of the fuel is modelled considering both the direct oxidation of UO2 by H2O2 and the galvanically-coupled oxidation by H2O2 reduction on ...
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