海洋核动力平台严重事故下熔融物堆内滞留分析程序开发

摘要

In view of the design characteristics of marine nuclear power plant (MNPP) , the technical scheme feasibility of molten pool material in-vessel retention (IVR) by external reactor vessel cooling (ERVC ) method under severe accident was discussed . According to the lower power density and small lower head size of MNPP ,the ERVC-IVR theory model and analysis code ,named SR-IVR ,were developed ,which were testi-fied with the benchmark problem .The results show that the model and code are suitable for the IVR analysis of MNPP under severe accident .%针对海洋核动力平台的设计特点,分析了严重事故下压力容器外冷却实现熔融物堆内滞留技术的可行性.根据海洋核动力平台功率密度较低和压力容器下封头尺寸较小的特点,建立了压力容器下封头内熔池传热理论模型,编制了分析程序SR-IVR,进行了基准例题验证.结果表明,本文所建分析模型和程序可用于海洋核动力平台严重事故下熔融物堆内滞留分析.