Modelling the thermal performance of Accident Tolerant Fuels based on UN

基于 UN 的事故耐受燃料热性能建模

• 批准号: 2622133
• 金额: --
• 依托单位: Bangor University
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2021
• 资助国家: 英国
• 起止时间: 2021 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2622133
• 关键词: Modelling; thermal; performance; Accident; Tolerant

A collaborative project between one of the world's largest fuel manufacturers - Westinghouse Electric Company - and Bangor University - will set out to provide a mechanistic understanding of thermal conductivity and thermal conductivity degradation in fuel concepts based on uranium nitride. Uranium nitride is a leading Accident Tolerant Fuel (ATF) candidate system due to its superior uranium density and thermal conductivity compared to UO2. Despite these advantageous properties, UN has a strong reaction with water that requires passivation of some kind. The additives/methods to passivate the UN will also be investigated.Atomic scale modelling methods developed here in Bangor University and around the world will be used to assess the thermal conductivity in three key areas:1. Model the thermal conductivity (TC) of UN to provide a baseline value - working with other groups around the world including Los Alamos National Laboratory, KTH and Imperial College London.2. Develop a model giving the effective thermal conductivity of composite UN fuel.3. Develop a thermal conductivity degradation (TCD) model for system.A range of techniques will be targeted including atomic scale modelling methods based on density functional theory (DFT) and classical potentials, as well as continuum modelling methods. Experimental assessment may be carried out too using Bangor University's MERLIN laboratories, able to handle and investigate uranium compounds.The student will be expected to not only complete the courses as part of the CDT but also interact regularly with the industry sponsor. As part of the US-DOE Accident Tolerant Fuels program, this project will have an international visibility and impact.

世界上最大的燃料制造商之一 - 西屋电气公司（Westinghouse Electric Company）和班戈大学（Bangor University）之间的合作项目将旨在为基于硝酸铀的燃料概念中的热导率和导热性降解提供机械理解。硝化铀是一种耐毒液（ATF）候选系统的领先意外燃料（ATF），由于其优质的铀密度和与UO2相比的导热率。尽管有这些有利的特性，但联合国对水的反应很强，需要钝化某种。在班戈大学（Bangor University）和世界各地开发的原子量表建模方法也将用于评估三个关键领域的热导率：1。建模联合国的热导率（TC）提供基线价值 - 与洛斯阿拉莫斯国家实验室，伦敦KTH和帝国学院在内的全球其他团体合作2。开发一个模型，具有复合联合燃料的有效导热率3。为系统开发热导率降解（TCD）模型。将针对一系列技术，包括基于密度功能理论（DFT）和经典电位的原子尺度建模方法以及连续建模方法。实验评估也可以使用班戈大学的梅林实验室进行，能够处理和调查铀化合物。期望学生不仅完成课程作为CDT的一部分，而且还可以定期与行业赞助商进行互动。作为美国 - 道路事故耐受燃料计划的一部分，该项目将具有国际知名度和影响力。