核电厂安全壳内置换料水箱过滤系统过滤性能及阻力特性研究

Assessment of Filtering and Pressure Drop Performances of IRWST Sump Strainers for Nuclear Power Plants

对核电厂安全壳内置换料水箱(IRWST)过滤系统过滤性能及压损特性进行了分析研究。该研究借助试验验证和数值模拟分析方式展开,主要包括下游效应(碎片浓度)试验研究和过滤系统压损分析2部分。结果表明,在事故工况下,地坑滤网下游碎片浓度为368 ppm(1 ppm=1 mg/L)、安全注入系统(RIS)地坑滤网和安全壳喷淋系统(EHR)地坑滤网的压损分别为3.533 kPa和3.631 kPa,上述结果分别满足了过滤系统碎片浓度小于480 ppm和压损小于5.6 kPa的系统功能要求。

In this paper, filtering property and pressure drop performances of the in-containment refueling water storage tank(IRWST) sump strainers system were studied. The research work was performed with experimentation and numerical simulation methods, including experimental research on the downstream debris concentration and the pressure drop analysis of the strainers. The results show that the downstream debris concentration is 368 ppm under accidental condition, and the pressure drop of the RIS & HER sump strainers is 3.533 kPa and 3.631 kPa, respectively, which meet the functional requirements of the downstream debris concentration(480 ppm) and system pressure drop(5.6 kPa) of the IRWST sump strainers.