Patent ID: 8817941
Filing Date: 2014-08-26
Classification: G21C,Y02E

Abstract:
1. A pressurized water reactor plant comprising: a single reactor vessel housing a reactor core cooled by a high-pressure primary coolant; a single steam generator that generates steam of a secondary coolant; the steam generator having: a hot leg pipe that guides the primary coolant heated in the reactor core from the reactor vessel to the plurality of tubes of the steam generator; at least two cold leg pipes configured to return the primary coolant that has been passed through the plurality of tubes of the steam generator to the reactor vessel; at least two reactor coolant pumps that feed the primary coolant in the at least two cold leg pipes to the reactor vessel; a pressurizer provided so as to communicate with a reactor pressure boundary in which the primary coolant flows, having a liquid surface therein, and pressurizing the reactor pressure boundary; a containment vessel containing the reactor vessel, the steam generator, the hot leg pipe, the at least two cold leg pipes, the at least two reactor coolant pumps, and the pressurizer; and a primary system depressurization device that equalizes a pressure of a primary system where the primary coolant flows to a pressure of a secondary system where the secondary coolant flows, when an accident has occurred in which a part of the plurality of tubes in the steam generator is ruptured.