Long-term effect analysis of AC600 passive containment cooling system

This paper presented long-term effect analysis of AC600 passive containment cooling system under loss-of-coolant accident (LOCA). A special code PCCSAC-3D code, was used to analyze the performance of the AC600 passive containment cooling system (PCCS) developed by Tsinghua University. The code classifies the working fluid in the containment into steam, uncondensable air, continuous liquid state water and discontinuous water and includes k-Ε turbulence model and diffusion model for main gas flow. The code considers non-uniform factors of space carefully. It can be used to analyze the majority physical phenomenon of the AC600 PCCS accurately. The conclusion is that the PCCS can ensure the integrality of the AC600 containment in the long-term.