Development of a multiscale multiphysics simulation toolset with uncertainty for nuclear safety assessment, design, and licensing of SMRs

开发具有不确定性的多尺度多物理场仿真工具集，用于 SMR 的核安全评估、设计和许可

• 批准号: 580447-2022
• 负责人: Lien, FueSangFS
• 金额: $ 4.79万
• 依托单位: University of Waterloo
• 依托单位国家: 加拿大
• 项目类别: Alliance Grants
• 财政年份: 2022
• 资助国家: 加拿大
• 起止时间: 2022-01-01 至 2023-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=760367
• 关键词: Development; multiscale; multiphysics; simulation; toolset

The objective of this proposal is to develop an integrated software tool set for nuclear safety assessment that combines a physics-based computer modelling and simulation of advanced small modular reactors (SMRs) with a comprehensive quantification of all uncertainties that arise in the modelling. This will enable an end-to-end uncertainty quantification (UQ) and principled safety (accident) analysis, prediction, and decision-making framework for SMRs (and, more broadly, for the next-generation advanced nuclear reactor technologies based on non-light water coolants such as molten salt, liquid metal and gas that will need to be assessed, monitored and controlled throughout their life cycle). Incorporation of UQ in the large-scale scientific simulator developed in this proposal, consisting of the coupling of a computational fluid dynamics model with a systems code, is the key-enabling technology that will provide the reliability, resilience, and trust for safety/mission-critical assessments in those settings that can potentially involve catastrophic consequences. Inclusion of information with respect to whether various figures of merit used in the safety evaluation of SMRs are confident or uncertain will permit more informed (science-based) decisions to be made by decision makers concerning the certification and licensing of advanced SMRs in Canada. As a consequence, this is especially beneficial for Canada's clean energy future as SMRs can produce a large amount of clean energy so this potentially disruptive technology must be one of the solutions to a carbon-free future path for Canada. Moreover, the small footprint of SMRs implies that they can be sited at remote locations and can be installed into the existing grid system or remotely off grid (e.g., in remotely indigenous communities) and, as a result, is an enabling technology for a clean energy future in Canada.

这项建议的目标是开发一套核安全评估综合软件工具，将先进的小型模块化反应堆的基于物理的计算机建模和模拟与对建模中出现的所有不确定性进行全面量化相结合。这将为SMR(以及更广泛地说，基于熔盐、液态金属和气体等非轻水冷却剂的下一代先进核反应堆技术，需要在其整个生命周期内进行评估、监测和控制)提供端到端不确定性量化和原则性安全(事故)分析、预测和决策框架。将UQ纳入本提案中开发的大型科学模拟器，包括计算流体动力学模型和系统代码的耦合，是关键的使能技术，将在那些可能涉及灾难性后果的环境中为安全/关键任务评估提供可靠性、复原力和信任。纳入关于SMR安全评估中使用的各种优值系数是可信的还是不确定的信息，将使决策者能够就加拿大高级SMR的认证和许可做出更明智的(基于科学的)决定。因此，这对加拿大的清洁能源未来尤其有利，因为SMR可以生产大量的清洁能源，因此这种潜在的颠覆性技术必须是加拿大未来无碳道路的解决方案之一。此外，SMR的占地面积很小，这意味着它们可以安装在偏远地点，可以安装到现有的电网系统中或远程脱网(例如，在偏远的土著社区)，因此是加拿大未来清洁能源的一项使能技术。