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The passive containment cooling system (PCCS) is one of the main passive safety systems in the advanced pressurized water reactor (APWR), which will utilize natural phenomena to remove the heat released from the reactor to the environment during the postulated design basic accidents for preventing the overpressure of the containment shell. It is significant for the evaluation on PCCS performance in the design by the numerical simulation with the analysis code. In this paper, a new developed containment analysis code with self-reliance intellectual property rights is used to simulate the containment transients of the advanced pressurized water reactor with the PCCS performance during the postulated LOCA. The sensitivity analyses on some concerned factors are performed. The results show that lower initial humidity in the containment, higher initial environment humidity, higher initial containment temperature and environment temperature will cause higher transient pressure peak in containment during the postulated accident

Preliminary Study for the Passive Containment Cooling System Analysis of the Advanced PWR