Development of a mechanistic model for gamma-radiolysis induced corrosion of copper in the DGR water environments

开发 DGR 水环境中伽马辐射引起铜腐蚀的机理模型

• 批准号: 520746-2017
• 负责人: Wren, Jungsook
• 金额: $ 7.21万
• 依托单位: University of Western Ontario
• 依托单位国家: 加拿大
• 项目类别: Collaborative Research and Development Grants
• 财政年份: 2019
• 资助国家: 加拿大
• 起止时间: 2019-01-01 至 2020-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=692610
• 关键词: Development; mechanistic; model; gamma; radiolysis; Development; mechanistic; model; gamma; radiolysis

The proposed project addresses the corrosion allowance of a candidate material for safe disposal of used nuclear fuel in a deep geologic repository (DGR). The current design of the used fuel container (UFC) uses a copper-coated carbon steel vessel. The project will develop a model for the effect of gamma radiation from the used fuel on copper corrosion under evolving conditions in a DGR. Copper corrosion as a function of potential DGR environments will be investigated in depth using the highly sophisticated physical and chemical techniques. Experimental studies will be accompanied with extensive calculations to develop a mechanistic corrosion model. This model will aim to predict the evolution of corrosion over long time periods under a continuous flux of gamma-radiation taking into account the complexities of copper corrosion, including electrochemical and solution reactions, and oxide formation and growth. The corrosion model will provide a more accurate assessment of the adequacy of the Cu corrosion allowance to protect the integrity of the UFC during the period when the radiation level in the DGR is still significant. This project will be an important component of UFC performance assessment models for the safe disposal of Canada's high level nuclear waste. It will also provide trained personnel to guarantee the safe implementation of the nation's nuclear waste disposal plan.

拟议的项目介绍了候选材料在深层地质存储库中安全处理用过的核燃料的腐蚀津贴。 使用的燃料容器（UFC）的当前设计使用铜涂的碳钢容器。 该项目将开发一个模型，以从使用的燃料对DGR中不断发展的条件下铜腐蚀的影响。将使用高度复杂的物理和化学技术深入研究铜腐蚀作为潜在DGR环境的函数。实验研究将伴随着广泛的计算，以开发机械腐蚀模型。该模型将旨在预测长期在伽马辐射的连续通量下长期腐蚀的演变，并考虑到铜腐蚀的复杂性，包括电化学和溶液反应，以及氧化物的形成和生长。 腐蚀模型将对CU腐蚀津贴的充分性提供更准确的评估，以保护UFC在DGR中的辐射水平仍然显着的时期。该项目将是UFC绩效评估模型的重要组成部分，以安全处理加拿大高水平的核废料。 它还将提供训练有素的人员，以保证安全实施国家的核废物处理计划。