Boiling water reactor plant with hybrid pressure containment cooling system

This patent describes a reactor plant. It comprises a containment structure defining a wet well, dry well, an isolation chamber means, a transducer chamber means; a two-phase reactor; a transducer for converting energy stored in heat-transfer vapor into another form of energy; transducer conduit means for conveying heat-transfer vapor to the transducer from the reactor; pressure relief means for relieving excessive pressure within the reactor vessel by conveying heat-transfer fluid, primarily heat-transfer vapor, from the vessel to the isolation chamber means in the event of the excessive pressure; a condenser having a distributor, a manifold, and a receiver; separator means for separating liquid from gas so that heat-transfer liquid exiting the condensor can be separated from heat-transfer vapor and noncondensable gas exiting the condenser, condensate return means for conveying heat-transfer liquid from the separator means to the reactor vessel; and emergency conduit means for conveying noncondensable gas from the separator means to the well during a loss-of-coolant accident