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Reactor pressure vessel cooling equipment and cooling method using reactor pressure vessel cooling equipment
Reactor pressure vessel cooling equipment and cooling method using reactor pressure vessel cooling equipment
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机译:反应堆压力容器冷却设备和使用反应堆压力容器冷却设备的冷却方法
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摘要
PROBLEM TO BE SOLVED: To provide cooling facilities of a reactor pressure vessel capable of cooling a reactor pressure vessel with a natural return current when a severe accident occurs in a reactor.SOLUTION: A wall member 2 is fixed separately by a gap G from a lower part of a reactor pressure vessel 1. A coolant water system is provided so that coolant water can flow into and out of the gap G. The coolant water system comprises: a condenser 9 arranged in a position higher than an outlet of coolant water; and an on-off valve 13 switchable between a blocking state and a flowing state of coolant water flowing down from the condenser 9. By switching the on-off valve 13 from its closing state to its opening state when a severe accident occurs, a coolant water system is formed in a natural return current by buoyant force of vapor and water head pressure of coolant water.
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