This paper provides an overview of the capabilities of a new toolset that is being developed at Canadian Nuclear Laboratories for modelling advanced non-water cooled small modular reactor concepts. Throughout the study, a technology agnostic approach was adopted. The integrated toolset includes computational fluid dynamics, neutronics and system thermalhydraulics codes to handle a range of multi-physics capabilities. The toolset has been applied to two different non-water cooled SMR concepts: molten salt and prismatic gas-cooled reactors. A step-wise approach was used in which the models were first tested using standalone codes, followed by execution of coupled-code simulations. This paper demonstrates the application of the toolset to gas-cooled and molten-salt reactor concepts, including transient simulations using the CFD code STAR-CCM+ coupled with the Monte Carlo neutronics code Serpent 2 and with the system thermalhydraulics code RELAP5-3D. The scenarios considered include a step reactivity insertion and a pump trip for the molten salt reactors. Overall, the results obtained so far demonstrates the potential of the developed methodology at CNL in simulating the non-water cooled concepts.

本文概述了加拿大核实验室正在开发的用于对先进的非水冷小型模块化反应堆概念进行建模的新工具集的功能。在整个研究过程中，采用了与技术无关的方法。集成工具集包括计算流体力学，中子学和系统热工代码，以处理多种多物理场功能。该工具集已应用于两种不同的非水冷SMR概念：熔融盐和棱柱形气冷反应堆。使用了一种逐步方法，其中首先使用独立代码对模型进行测试，然后执行耦合代码模拟。本文演示了该工具集在气冷和熔盐反应堆概念中的应用，包括使用CFD代码STAR-CCM +，蒙特卡洛中子学代码Serpent 2和系统热工代码RELAP5-3D进行的瞬态仿真。考虑的场景包括一步反应性插入和熔融盐反应器的泵行程。总体而言，迄今为止获得的结果证明了CNL所开发方法论在模拟非水冷概念方面的潜力。