| 摘要 |
When a power source is lost after an operation stop of a nuclear power plant, a first open/close valve is opened by electricity of a first battery at an early stage and steam in a reactor pressure vessel (RPV) is condensed in a suppression pool. The heat of the cooling water in the suppression pool is transmitted to cooling water of a cooling water pool located below inner space between a first reactor containment vessel (PCV) surrounding the RPV and a second PCV surrounding it. A second open/close valve is opened by electricity of a second battery at the early stage and cooling water in a water tank is injected into the RPV. After a lapse of the early stage, a third open/close valve is opened by electricity of a third battery, and a cooling medium becomes steam by an evaporator in the RPV, and this steam is condensed by a condenser disposed in the inner space to become a liquid of the cooling medium and is returned to the evaporator. |
