| 摘要 |
A reactor containment vessel with a cooling system includes a communication pipe having a valve to be connected to either an emergency condenser or suppression chamber in order to improve cooling performance by removing non-condensable gas from heat exchanger tubes when a main steam line is broken. One open end of the communication pipe is opened and positioned at a low position of the dry well. The valve is constantly closed and actuated to be opened in an abnormal condition of a reactor. When the valve is opened, the communication pipe introduces the non-condensable gas existing in the emergency condenser or suppression chamber to the low area of the dry well due to a density differential between steam and non-condensable gas, thus removing the non-condensable gas from the heat exchanger tubes, and improving the cooling performance of the emergency condenser.
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