Abstract: The load of the once through steam generator of the marine integrated reactor increases with the increase of the reactor power during the star-up. In the practical operation, it is specified that when the reactor power reaches a certain value, the steam superheat at the outlet of the steam generator meets the requirements, and the core power continues to be increased. And the secondary circuit side mainly depends on the increase of the feedwater flow to achieve follow-up. The operation scheme of the casing once through steam generator is determined based on the analysis of the flow instability for the marine casing once through steam generator during the start-up process. The corresponding modelling established by the RELAP5 code is then calculated and analyzed to verify the feasibility of the designed start-stop auxiliary system.

Key words: marine, integrated reactor, start-stop auxiliary system, RELAP5

摘要： 船用一体反应堆直流蒸汽发生器在启动过程中,其负荷随着反应堆功率的提升而增加,在实际运行中,规定当反应堆功率达到一定值时蒸汽发生器出口蒸汽过热度达到要求,继续提升堆芯功率,二回路侧主要依靠给水流量的增加实现跟随。文中通过对启动过程中船用套管式直流蒸汽发生器的流动不稳定性进行分析,确定套管式直流蒸汽发生器启动过程的运行方案,并使用RELAP5程序建立相应的模型,通过计算和分析验证了所设计的启停辅助系统的可行性。

关键词: 船用, 一体化反应堆, 启停辅助系统, RELAP5