Containment passive pressure suppression system

Abstract

The invention discloses a containment passive pressure suppression system. A pressure suppression pool of the system comprises a water space and an air space, wherein the water space is arranged around a reactor pit and communicates with a containment drywell; cooling water is contained in the water space; the initial water level in the water space is higher than a reactor core in the reactor pit; the air space is arranged around the water space and communicates with the water space. The water space and the air space are in transverse arrangement, so that the height of the pressure suppression pool is reduced, so that the space volume of the pressure suppression pool occupied by the containment is reduced; the dimension of the containment can be further reduced; meanwhile, the duplex isolation function can be realized; the realization of the radiation shielding function is facilitated, so that the containment can use the single layer structure; the structure is simpler; the small-size design of the containment of a marine nuclear power station is facilitated. In addition, the air isolation is realized between the water space and the air space; the air-water isolation can also be ensured in the swinging environment.

Description

technical field [0001] The invention relates to a passive cooling system for a containment vessel of a nuclear power plant, in particular to a pressure suppression system suitable for an offshore nuclear power plant that can passively suppress pressure rise in the containment vessel. Background technique [0002] The containment is an important safety facility of a nuclear power plant and the last barrier to prevent radioactive substances from being released into the atmosphere. In order to prevent the radioactive material released from the core from leaking to the environment, a kind of containment vessel of an existing large nuclear power plant is designed as a double-layer structure. Specifically, the containment vessel includes an inner shell covering the reactor pit and an outer shell covering the inner shell. Wherein, the inner shell includes a first cylindrical side wall, an upper cover and a first top plate, and the first top plate airtightly connects the periphery ...

AI Technical Summary

Problems solved by technology

[0004] An important direction for the development of nuclear power technology in the future is offshore nuclear power plants. Due to their particularity, offshore nuclear power plants need to be miniaturized based on existing large-scale nuclear power plants. miniaturized design

At the same time, among the above-mentioned suppression methods, the first method has the defect of complex equipment and takes up a large space; the design of the suppression pool in the second method is generally not reasonable enough, resulting in the suppression pool occupying a large space in the containment volume, so that the size of the containment can not be further reduced, which is also not conducive to the miniaturization design of the containment

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