In the next generation light water reactors, the adoption of a passive system concept is proposed, which can enhance safety system reliablity and plant simplicity. The passive containment cooling system (PCCS) removes the decay heat following an accident without any operational actions. Toshiba has proceeded with the development of study program for the PCCS from the thermal-hydraulic viewpoint. The program includes mainly a testing program using a full-height, integral system test facility GIRAFFE as well as supplemental basic test programs. The results of these testing have shown that the PCCS has heat removal capability sufficient to prevent the containment from exceeding the design pressure following an accident, and that the PCCS is a promising concept to enhance plant safety for the next generation nuclear reactors.
展开▼
