Ensuring a secure and reliable execution of the International Fusion Materials Irradiation Facility (IFMIF) and the DEMO-Oriented Neutron Source (DONES) requires their liquid lithium loops to be purified from hydrogen isotopes which are generated during operation. For this purpose, an yttrium pebble-bed will serve as a hydrogen hot trap. Former intentions to predict the retention behavior of an yttrium pebble-bed are based on the consideration of the trap as a black box with a predetermined trap efficiency. Disregarding the internal physical mechanisms of the gettering process these models are built on simplified assumptions and should be extended to allow reliable trap designs for IFMIF/DONES. Therefore, a detailed numerical model describing the hydrogen transport from flowing liquid lithium into an yttrium pebble-bed has been developed from scratch within the scope of this work. It enables simulating the hydrogen retention process into an arbitrarily dimensioned getter bed for...

中文翻译：

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液态锂在钇球床中氢同位素保留的数值研究

为了确保安全可靠地执行国际聚变材料辐照设施（IFMIF）和面向DEMO的中子源（DONES），需要将其液态锂环从运行过程中产生的氢同位素中纯化出来。为此，钇卵石床将用作氢热阱。预测钇卵石床的保留行为的先前意图是基于将捕集器视为具有预定捕集器效率的黑匣子。不管吸气过程的内部物理机制如何，这些模型都是基于简化的假设构建的，应该扩展以允许为IFMIF / DONES设计可靠的疏水器。因此，在这项工作的范围内，已经从零开始建立了一个详细的数值模型，描述了从液态锂流动到钇卵石床中的氢迁移。它可以将氢保留过程模拟为任意尺寸的吸气床，用于...