Verification and validation of multi-physics codes dedicated to fast-spectrum molten salt reactors (MSR) is a very challenging task. Existing benchmarks are meant for single-physics codes, while experimental data for validation are absent. This is concerning, given the importance numerical simulations have in the development of fast MSR designs. Here, we propose the use of a coupled numerical benchmark specifically designed to assess the physics-coupling capabilities of the aforementioned codes. The benchmark focuses on the specific characteristics of fast MSRs and features a step-by-step approach, where physical phenomena are gradually coupled to easily identify sources of error. We collect and compare the results obtained during the benchmarking campaign of four multi-physics tools developed within the SAMOFAR project. Results show excellent agreement for all the steps of the benchmark. The benchmark generality and the broad spectrum of results provided constitute a useful tool for the testing and development of similar multi-physics codes.

中文翻译：

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熔盐快堆专用代码的多物理场数值基准结果

验证和验证专用于快谱熔盐反应堆 (MSR) 的多物理场代码是一项非常具有挑战性的任务。现有的基准测试适用于单一物理代码，而没有用于验证的实验数据。鉴于数值模拟在快速 MSR 设计开发中的重要性，这是令人担忧的。在这里，我们建议使用专门设计的耦合数值基准来评估上述代码的物理耦合能力。该基准测试侧重于快速 MSR 的特定特性，并采用逐步方法，其中物理现象逐渐耦合以轻松识别错误来源。我们收集并比较了在 SAMOFAR 项目中开发的四种多物理场工具的基准测试活动中获得的结果。结果显示，基准测试的所有步骤都非常一致。所提供的基准通用性和广泛的结果构成了测试和开发类似多物理场代码的有用工具。