Pressure suppression pool

Abstract

The invention discloses a pressure suppression pool. The pressure suppression pool is of a closed structure. The pressure suppression pool is filled with liquid for condensation; a non-condensable gasspace is formed on the liquid; the ventilated pressure suppression pipe penetrates through the pool, goes deep below the liquid level and is fixedly connected with the pressure suppression pool; oneend of the pressure suppression pipe is connected with a gas space in the containment vessel; the other end is immersed in the liquid; a steam bubble cutting part is arranged at an outlet, immersed inthe liquid, of the pressure suppression pipe; a fence part is arranged at the periphery of the pressure suppression pipe; the fence part is arranged in liquid, at least one gas one-way conduction part is arranged on the pressure suppression pipe, the gas one-way conduction part is connected with gas in the pressure suppression pipe and a gas space in the pressure suppression pool, the conductiondirection is that the gas flows into the pipe body from the gas space, and when the gas pressure in the gas space is greater than the gas pressure in the pipe body, the gas space is conducted. Pressure oscillation generated inside and outside the pipe in the steam jet condensation process can be restrained, pressure oscillation and the water hammer phenomenon generated in the pressure restrainingwater pool are restrained, and the safety of nuclear facilities is improved.

Description

technical field [0001] The invention relates to a depressing water pool, in particular to a depressing water pool which can effectively suppress pressure oscillation, and belongs to the field of nuclear power. Background technique [0002] Steam jet condensation is used in the field of nuclear power due to its high-efficiency heat and mass transfer characteristics. The decompression pool is set and installed in the containment according to this principle. When a primary circuit breach accident or a steam pipe rupture accident occurs in the containment , the mixture of steam and air in the containment enters into the suppression pool through the suppression pipe under the action of pressure difference to be cooled, thereby suppressing the pressure rise of the containment. [0003] However, during the steam condensation process, when condensation begins to occur at the mouth of the pressure suppression pipe, a vacuum state will be temporarily formed due to the collapse and dis...

AI Technical Summary

Problems solved by technology

[0003] However, during the steam condensation process, when condensation starts to occur at the mouth of the pressure suppression pipe, a vacuum state will be temporarily formed due to the collapse and disappearance of the bubble condensation and the reduction in the volume of the steam, and the condensed water will be sucked into this vacuum space at this time, so that Due to the inertia of the condensed water, they collide with each other to form a water hammer in the tube, and the condensed water forms a surge in the suppression tube and impacts each other

This will cause mechanical vibration of the equipment, which will seriously impact and damage the surrounding related facilities, adversely affect the strength and life of the equipment, and thus affect the safety of the nuclear facility system

In the prior art, in order to suppress the above-mentioned pressure oscillation in the pipe, the method of injecting non-condensable gas into the pipe with a small flow rate through devices such as fans or gas cylinders is conventionally used to suppress the pressure oscillation in the pipe, but these devices have a certain volume and will occupy A certain space in the containment shell takes up a lot of overall resources

[0004] In addition, rapid condensation will cause pressure oscillations, which can easily resonate with surrounding facilities. When steam enters the condensed water, external pressure oscillations will also occur in the suppressed pool

The pressure oscillation inside and outside the pipe will cause the mechanical vibration of the equipment, which will seriously impact and damage the surrounding related facilities, and have an adverse effect on the strength and life of the equipment, thus affecting the safety of the nuclear facility system

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