Multi-physics reactor optimisation coupled with uncertainty quantification

多物理反应堆优化与不确定性量化相结合

• 批准号: 2462437
• 金额: --
• 依托单位: University of Cambridge
• 依托单位国家: 英国
• 项目类别: Studentship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=studentship-2462437
• 关键词: Multi; physics; reactor; optimisation; coupled

The modelling of nuclear reactor systems is one of the most challenging tasks in complex system modelling, due to the many different scales and coupled physical phenomena involved. The task is further complicated if efforts are also made to account for the unavoidable uncertainties in nuclear data, operating conditions, manufacturing tolerances, changes with age etc. With advances in the capabilities of codes and in the availability of high performance computing resources, it is now possible to undertake such analyses as one-off calculations, but the computational cost of performing such analyses many times within a design optimisation process remains prohibitive. To facilitate design optimisation computationally cheaper models must be employed. Such models can be surrogates built using a limited number of high-fidelity (computationally expensive) simulations or lower-fidelity models based on simplified physics. This project will explore ways in which state-of-the-art approaches to surrogate modelling and multifidelity analysis can be employed to facilitate multi-physics analysis and design optimisation of nuclear systems.

核反应堆系统的建模是复杂系统建模中最具挑战性的任务之一，因为涉及许多不同的尺度和耦合的物理现象。如果还努力考虑核数据、运行条件、制造公差、老化变化等方面不可避免的不确定性，则任务将进一步复杂化。随着代码能力的提高和高性能计算资源的可用性，现在可以进行一次性计算等分析，但是在设计优化过程中多次执行这种分析的计算成本仍然过高。为了便于设计优化计算便宜的模型必须采用。这些模型可以是使用有限数量的高保真（计算昂贵）模拟或基于简化物理的较低保真度模型构建的替代模型。该项目将探索如何利用最先进的替代建模和多保真度分析方法来促进核系统的多物理分析和设计优化。