An Active and passive containment combined heat removal system

The present invention relates to a system for heat-dissipating containment passive and active combination, which comprises a water tank arranged inside the structure of the heat exchanger vessel and the external tank is higher than the heat exchanger, the bottom of the tank through the downcomer section and an inlet connected to the heat exchanger, is provided with a cooling, filtering and water collecting spray liquid cooling and collection system at the top of the tank, the riser section and the condenser inlet and a cooling spray liquid collection system is connected, is condensed an outlet port connected to the water tank, a condenser is provided above the spray device, spray cooling liquid and collection system includes a fan is provided, the cover is provided with a bottom drainage incorporated in the cover above the tank top of the drainage, the drainage cover tuyere. The present invention can always provide the passive system is put into operation means efficient cooling tank, the water temperature is maintained at a low level, enabling the system to obtain a higher natural circulation heat removal capacity and power, effective long-term containment cooling buck.