Optimization of Design on Passive Containment Cooling System by using Relap5 Code
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摘要: 利用Relap5计算程序对2种非能动安全壳热量导出系统(PCS)的3个设计方案进行对比研究,从启动时间、运行工况的稳定性、平衡工况的换热能力等方面对设计方案的优劣进行评价。结果表明:在使用相同换热器情况下,开式PCS的启动时间最短,平衡后也具有最高的换热能力,而闭式单相PCS则具有运行工况稳定的优点;若闭式PCS使用面积为开式PCS换热器双倍的方案,则闭式单相PCS系统不仅运行工况稳定,且设计工况下的平衡换热能力也高于开式PCS。Abstract: The performance of three conceptual designs with two types of passive containment cooling system（PCS） was studied by using Relap5 code. The evaluation of the performance of different design scheme was conducted in terms of startup, the stability of the operation process, the heat removal capacity in long-term balanced condition. The results show that the startup of the open loop PCS will cost the least time and its heat removal capacity of the in-containment heat exchanger will be the best one if the same heat exchangers are used in both open loop PCS and closed loop PCS. The stability of the operation process for closed loop PCS is the best. The closed loop PCS may be improved by introducing a double-heat transfer area heat exchanger. The performance of the improved closed loop PCS has the advantages of stable operation and good heat removal capacity.
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Key words:
- Passive /
- Containment /
- Open loop /
- Closed loop /
- Optimization
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