混合能谱超临界水堆失流事故缓解措施研究

Loss of Flow Accident Mitigation Measures of Mixed Spectrum SCWR-M

摘要: 使用改进的系统程序RELAP5建立了一个混合能谱超临界水堆(SCWR-M)模型。为研究混合能谱超临界水堆失流事故特性，以获取缓解混合能谱超临界水堆失流事故的措施，选取反应堆冷却剂泵惰转时间、压力容器上部储水空间容积和安注流量作为主要参数进行分析。研究表明，混合能谱超临界水堆系统的设计是可行的。反应堆冷却剂泵惰转15 s，压力容器上部水空间容积大于27 m³，以及安注流量高于系统满功率稳态流量的5%是缓解混合能谱超临界水堆失流事故的主要措施。

Abstract: Based on a revised version of RELAP5, a model of the mixed spectrum supercritical water cooled reactor (SCWR-M) system was established. Some important parameters were chosen as the main parameters to analysis the transient behaviour of SCWR-M and fix mitigation measures during loss of flow accident (LOFA). Reactor coolant pump (RCP) coast-down time of more than 15 seconds, RPV upper water volume of more than 27 m³, and safety injection of more than 5% of the system design flow are the main mitigation measures for the LOFA of SCWR-M.