FIELD: designing and construction of nuclear power plants with water-cooled power reactors. SUBSTANCE: installed on the floor of the concrete pit is a water- cooled circular section heat exchanger. Baskets are installed on the sections of the circular heat exchanger. Supporting ribs are installed on the floor of the concrete pit between the sections of the circular heat exchanger and the basket sections. The basket bottom and walls are coated with perforated members. A concrete bracket, whose inside diameter is less than the outside diameter of the reactor vessel, is made in the concrete pin between the circular section heat exchanger and the bottom of the reactor vessel. The supporting ribs, positioned radially under the bottom of the reactor vessel, are brought out to the level of the concrete bracket. The device passages for supply of the heat-transfer agent are used for passive replenishment of the circular section heat exchanger with water providing for cooling of corium delivered to the room of the concrete pit positioned under the reactor. Protection of the circular section heat exchanger against superallowed loads on the side of the destructed reactor equipment and corium is ensured by the concrete bracket, supporting ribs, perforated members and basket. Protection against heat shocks is provided by perforated members, basket and a heat-insulating layer. EFFECT: enhanced safety of nuclear power plant in case of destruction of the active zone and outflow of corium beyond the reactor vessel. 25 cl, 6 dwg
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Authors
Dates
2001-04-10—Published
1999-06-02—Filed