An integral test facility, PILLAR, was commissioned, aiming to provide valuable experimental results which can be referenced by system and component designers and used for the performance demonstration of liquid-metal-cooled, passive small modular reactors (SMRs) toward their licensing. The setup was conceptualized by a scaling analysis which allows the vertical arrangements to be conserved from its prototypic reactor, scaled uniformly in the radial direction achieving a flow area reduction of 1/200. Its final design includes several heater rods which simulate the reactor core, and a single heat exchanger representing the steam generators in the prototype. The system behaviors were characterized by its data acquisition system implementing various instruments. In this paper, we present not only a detailed description of the facility components, but also selected experimental results of both steady-state and transient cases. The obtained steady-state test results were utilized for the benchmark of a system code, achieving a capability of accurate simulations with ±3% of maximum deviations. It was followed by qualitative comparisons on the transient test results which indicate that the integral system behaviors in passive LBE-cooled systems are able to be predicted by the code.

一个整体测试设施 PILLAR 已投入使用，旨在提供有价值的实验结果，系统和组件设计人员可以参考这些结果，并用于液态金属冷却的无源小型模块化反应堆 (SMR) 的性能演示，以获得许可。该装置是通过缩放分析概念化的，它允许垂直排列从其原型反应器中保留下来，在径向方向上均匀缩放，实现了 1/200 的流动面积减少。其最终设计包括多个模拟反应堆堆芯的加热棒，以及代表原型中蒸汽发生器的单个热交换器。系统行为的特点是其数据采集系统实现了各种仪器。在本文中，我们不仅提供了设施组件的详细描述，但也选择了稳态和瞬态情况的实验结果。将获得的稳态测试结果用于系统代码的基准测试，实现了±3% 最大偏差的精确模拟能力。随后对瞬态测试结果进行了定性比较，表明无源 LBE 冷却系统中的整体系统行为能够通过代码进行预测。