Abstract Performing accurate numerical simulations of molten salt reactors is challenging, especially in case of fast-spectrum designs, due to the unique physics phenomena characterizing these systems. The limitations of codes traditionally used in the nuclear community often require the development of novel high-fidelity multi-physics tools to advance the design of these innovative reactors. In this work, we present the most recent code developed at Delft University of Technology for multi-physics simulations of liquid-fueled fast reactors. The coupling is realized between an incompressible RANS model and an S N neutron transport solver. The models are implemented in two in-house codes, based on the discontinuous Galerkin Finite Element discretization, which guarantees high-quality of the solution. We report and discuss the results of preliminary simulations of the Molten Salt Fast Reactor at steady-state and during a Total Loss of Power transient. Results prove our code has capabilities for steady-state and transient analysis of non-moderated liquid-fueled reactors.

中文翻译：

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基于不连续 Galerkin FEM 离散化的液体燃料快速系统多物理场求解器

摘要 对熔盐反应堆进行准确的数值模拟具有挑战性，尤其是在快速光谱设计的情况下，因为这些系统具有独特的物理现象。核界传统上使用的代码的局限性通常需要开发新颖的高保真多物理场工具来推进这些创新反应堆的设计。在这项工作中，我们展示了代尔夫特理工大学开发的用于液体燃料快堆多物理场模拟的最新代码。耦合是在不可压缩的 RANS 模型和 SN 中子输运求解器之间实现的。这些模型是在两个内部代码中实现的，基于不连续的 Galerkin 有限元离散化，保证了解决方案的高质量。我们报告并讨论了熔盐快堆在稳态和瞬态总功率损失期间的初步模拟结果。结果证明我们的代码具有对非慢化液体燃料反应堆进行稳态和瞬态分析的能力。