A model for the influence of steel corrosion products on nuclear fuel corrosion under permanent disposal conditions

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• 作者：L. Wu^a ; Y. Beauregard^b ; Z. Qin^a ; S. Rohani^c ; D.W. Shoesmith^a ; ^{dwshoesm@uwo.ca}
• 关键词：A. Steel ; B. Modelling studies ; C. Anodic dissolution ; C. Interfaces
• 刊名：Corrosion Science
• 出版年：2012
• 期刊代码：28_0010938x
• 类别：ch
• 出版时间：August, 2012
• 卷：61
• 期：Complete
• 页码：83-91
• 文件大小：863 K

摘要

A model was developed to determine the influence of steel corrosion products on 伪-radiolytic corrosion of spent nuclear fuel inside a failed waste container. The model takes into account the 伪-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 Fe²⁺ to scavenge H₂O₂ had only a minor influence on fuel corrosion processes.