Abstract The small PWR has been paid more and more attention due to its diversity of application and flexibility in the site selection. However, the large core power density, the small containment space and the rapid accident progress characteristics make it difficult to control the containment pressure like the traditional PWR during the LOCA. The pressure suppression system has been used by the BWR since the early design, which is a suitable technique that can be applied to the small PWR. Since the configuration and operating conditions are different from the BWR, the pressure suppression system should be redesigned for the small PWR. Conducting the experiments on the scale down test facility is a good choice to reproduce the prototypical phenomena in the test facility, which is both economical and reasonable. A systematic scaling method referring to the H2TS method was proposed to determine the geometrical and thermohydraulic parameters of the pressure suppression containment response test facility for the small PWR conceptual design. The containment and the pressure suppression system related thermohydraulic phenomena were analyzed with top-down and bottom-up scaling methods. A set of the scaling criteria were obtained, through which the main parameters of the test facility can be determined.

中文翻译：

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小型压水堆压力抑制安全壳试验装置的规模分析

摘要 小型压水堆因其应用的多样性和选址的灵活性而越来越受到重视。但由于堆芯功率密度大、安全壳空间小、事故进展快等特点，在LOCA期间难以像传统压水堆一样控制安全壳压力。压水堆从设计初期就采用了压力抑制系统，是一种适用于小型压水堆的合适技术。由于配置和运行条件与BWR不同，压力抑制系统应针对小型PWR重新设计。在按比例缩小的测试设备上进行实验是在测试设备中重现原型现象的一个不错的选择，既经济又合理。针对小型压水堆概念设计，提出了一种参考H2TS方法的系统缩放方法来确定压力抑制安全壳响应测试设施的几何和热工水力参数。使用自上而下和自下而上的缩放方法分析了与安全壳和压力抑制系统相关的热工水力现象。获得了一组缩放标准，通过这些标准可以确定测试设施的主要参数。