The evolution of volatile species during thermal treatment of PCM and plutonium residues

PCM 和钚残渣热处理过程中挥发性物质的演变

• 批准号: 2898674
• 金额: --
• 依托单位: University of Sheffield
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2023
• 资助国家: 英国
• 起止时间: 2023 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2898674
• 关键词: evolution; volatile; species; during; thermal

The implementation of new technologies will make a vital contribution to the UK national mission to clean-up the UK's nuclear legacy. Thermal treatment processes, including vitrification, form an important part of this work; successful implementation of a vitrification process requires a good scientific understanding of the fate of volatile species during the melting process. This requires in-situ analysis of the kinetically favoured species produced during melting coupled with detailed analysis of the glasses produced. This project will focus on developing our understanding of which volatile species are formed and under what conditions, and whether they involve elements of concern, during the vitrification of plutonium contaminated materials and Pu residues in a number of different glass chemistries. The project will involve glass melting coupled with in-situ off gas analysis; followed by detailed analysis of the glasses produced using a range of structural and chemical analysis techniques. Although most of the work will involve the use of inactive simulant materials, there will be the potential to perform a limited number of small-scale melts involving active materials. As a supplement to the main project, analysis of samples from inactive large-scale trials using commercial technologies will also be undertaken. The successful candidate will therefore develop a significant skill set in glass production coupled with off-gas and materials analysis.

新技术的实施将对英国清理英国核遗产的国家使命做出重要贡献。热处理工艺，包括玻璃化，是这项工作的重要组成部分；玻璃化过程的成功实施需要对熔化过程中挥发性物质的命运有很好的科学理解。这需要对熔化过程中产生的动力学有利物质进行现场分析，并对所产生的玻璃进行详细分析。该项目将侧重于发展我们对钚污染材料和不同玻璃化学物质中的Pu残留物在玻璃化过程中形成的挥发性物质的理解，以及在什么条件下形成的挥发性物质，以及它们是否涉及相关元素。该项目将包括玻璃熔化和现场废气分析；然后使用一系列结构和化学分析技术对生产的玻璃进行详细分析。虽然大部分工作将涉及使用非活性模拟材料，但仍有可能进行有限数量的涉及活性材料的小规模熔炼。作为主要项目的补充，还将利用商业技术对未进行大规模试验的样品进行分析。因此，成功的候选人将在玻璃生产以及废气和材料分析方面发展重要的技能。