Atomic-scale cryogenic microscopy to understand degradation of vitrified waste

原子级低温显微镜了解玻璃化废物的降解

• 批准号: 2764562
• 金额: --
• 依托单位: Imperial College London
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2022
• 资助国家: 英国
• 起止时间: 2022 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2764562
• 关键词: Atomic; scale; cryogenic; microscopy; understand

The primary framework of this project is in the vitrification process that is used to encapsulate and stabilize high-level radioactive waste in a glass form, for long term safe, storage. Understanding the corrosion mechanisms involved in the reactions between glass and atmospheric water vapor conditions is fundamental to long-term assessment of nuclear waste glasses. For this project you will focus on innovative cryogenic sample preparation to target specific regions of interest at altered corrosion layers of glass and perform atomic-scale microscopy using our world-unique infrastructure.While some analyses of corrosion can be carried out in-situ, nuclear waste storage approval requirements are on the time scale of hundreds if not thousands of years. Synthesized ancient glasses provide an opportunity to study natural corrosion processes which are intermediate in time span between geological natural glasses and short-term laboratory tests lasting a few hours to several decades.

该项目的主要框架是玻璃化过程，用于将高放射性废物以玻璃形式封装和稳定，以便长期安全储存。了解玻璃和大气水蒸气条件之间的反应所涉及的腐蚀机制是长期评估核废料玻璃的基础。在这个项目中，您将专注于创新的低温样品制备，以针对玻璃腐蚀层的特定目标区域，并使用我们世界独一无二的基础设施进行原子级显微镜检查。虽然一些腐蚀分析可以在现场进行，但核废料储存批准要求的时间尺度是数百年甚至数千年。人工合成的古代玻璃提供了一个研究自然腐蚀过程的机会，自然腐蚀过程的时间跨度介于地质天然玻璃和持续几个小时到几十年的短期实验室测试之间。