Pressure suppression cooling system suitable for small reactor

Abstract

The invention belongs to the technical field of pressure suppression cooling systems and particularly relates to a pressure suppression cooling system suitable for a small reactor. The upper part of acontainment shell is a hemispherical steel dome, the lower part of the containment shell is a cylinder, and the upper part of the containment shell is isolated from the lower part of the containmentshell by a steel plate; the cylinder is internally provided with an annular water tank, the outer round edge of the annular water tank is hermetically connected with the inner wall of the cylinder, the inner circle of the annular water tank is concave downward to form a barrel-shaped space, and a space between the outer surface of the annular water tank and the lower surface of the steel plate forms a dry well; a space between the inner surface of the annular water tank and the bottom surface of the cylinder forms a wet well. A pressure vessel is placed in the barrel-shaped space, a pluralityof cooling boxes are arranged on the outer surface of the annular water tank, and ice is loaded in the cooling boxes. After the pressure of the dry well is increased, upper cover plates of the coolingboxes are opened to cool the dry well; after the ice melts, valves at the bottoms of the cooling boxes are switched on, cooling water in the wet well is injected into the bottom of the dry well to submerge the pressure vessel for cooling, and a reactor core is prevented from being melted.

Description

technical field [0001] The invention belongs to the technical field of decompression cooling systems, and in particular relates to a decompression cooling system suitable for small stacks. Background technique [0002] With the rapid development of the nuclear power industry in recent years, small reactors have been favored due to their good safety design concepts, simplified structure, and the ability to meet the application requirements of small and medium-sized power grids, urban heating, industrial process heating, and seawater desalination. extensive attention. At the same time, its safety is also valued by people. Suppression cooling technology is the first reactor safety technology commercially used in large boiling water reactors. However, compared with large boiling water reactors, small reactors have the characteristics of smaller containment volume, and the pressure and temperature will change more rapidly after a loss of water accident. The current suppression ...

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Problems solved by technology

Suppression cooling technology is the first reactor safety technology commercially used in large boiling water reactors. However, compared with large boiling water reactors, small reactors have the characteristics of smaller containment volume, and the pressure and temperature will change more rapidly after a loss of water accident. The current suppression technology is not suitable for small-scale reactors; research on small-scale reactor suppression technology at home and abroad is a hot issue, but it has not yet been commercialized

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