Pressure suppression pipe and pressure suppression pool applying pressure suppression pipe

A technology for suppressing water pools and pressure pipes, applied in the field of nuclear power, can solve problems such as affecting the safety of nuclear facility systems, damage to surrounding related facilities, etc., and achieve the effects of suppressing water hammer, increasing safety and reliability, and simplifying working methods.

Active Publication Date: 2020-08-28
HARBIN ENG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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

Method used

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  • Pressure suppression pipe and pressure suppression pool applying pressure suppression pipe
  • Pressure suppression pipe and pressure suppression pool applying pressure suppression pipe
  • Pressure suppression pipe and pressure suppression pool applying pressure suppression pipe

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] combine figure 1 , The decompression pool is installed in the safety shell, including the air space 1, the water space 2, and the decompression pipe 3. The air space 1 is initially filled with non-condensable gas of 1 atmosphere pressure, mainly air, the water space 2 contains supercooled water for condensation, and one end of the suppression pipe 3 is immersed in the supercooled water contained in the water space 2 of the suppression pool , the suppression pipe 3 connects the water space 2 of the suppression pool and the air space in the containment, and the suppression pipe 3 has a suppression pipe inlet connected with the gas space of the containment and a suppression pipe connected with the water space of the containment pool Tube outlet. The ventilated suppression pipe 3 penetrates the pool deep below the liquid surface and is fixedly connected with the suppression pool. Its function is to transfer the mixture of steam and air in the containment from the gas space...

Embodiment 2

[0032] combine figure 2, on the basis of Example 1, an enclosure 5 for suppressing pressure oscillations is added in the water space 2, the enclosure 5 is cylindrical and barrel-shaped around, and its top is located below the water surface of the water space 2 and above the outlet of the pressure suppression pipe, The bottom is located under the outlet of the suppression tube submerged in the liquid. The bottom has a certain distance from the bottom of the water space 2. It has a ring structure around the suppression tube 3 and is concentric with the suppression tube 3. The enclosure 5 is connected to the suppression pool or The pressure suppression pipe is fixedly connected, and the design purpose of the enclosure 5 is to weaken the condensation driving potential of the steam jet condensation process by increasing the water temperature around the pressure suppression pipe 3, thereby suppressing the pressure oscillation generated during the jet condensation process. In partic...

Embodiment 3

[0035] combine image 3 , on the basis of Embodiment 1, the outlet of the pressure suppression tube 3 submerged in the liquid is additionally provided with a bubble cutting component 6 . The bubble cutting part 6 is located at the outlet of the pressure suppression pipe 3, and its purpose is to cut the large bubbles generated at the outlet of the pressure suppression pipe 3 into small bubbles, and weaken the pressure oscillation by breaking the bubbles. When high-temperature steam is injected into the decompression pool, bubbles will be generated at the outlet, and the bubbles will condense with water and eventually collapse and disappear. The water hammer induced by the bubble collapse is the cause of pressure oscillation. At this time, the bubble cutting part 6 set at the outlet of the pressure suppression tube can cut the large bubbles generated at the outlet into small bubbles, thereby reducing the intensity of the pressure oscillation.

[0036] The bubble cutting part us...

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PUM

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Abstract

The invention discloses a pressure suppression pipe and a pressure suppression pool applying the pressure suppression pipe. At least one gas one-way conducting part is arranged on the pressure suppression pipe, the conducting direction is that gas flows into the pipe body from the outside of the pipe body, and when the air pressure outside the pipe body is greater than the air pressure inside thepipe body, the gas is conducted. The pressure suppression pool applying the pressure suppression pipe is of a closed structure; the pressure suppression water tank is filled with liquid for condensation; a non-condensable gas space is arranged above the liquid, the ventilated pipe body penetrates through the water tank, goes deep into the liquid level and is fixedly connected with the pressure suppression water tank, one end of the ventilated pipe body is connected with the gas space in the containment vessel, the other end of the ventilated pipe body is immersed in the liquid, and the gas one-way conduction part is connected with the gas in the pipe and the gas space in the pressure suppression water tank. The occurrence frequency of pressure oscillation in the pipe generated in the steamjet condensation process in the pressure suppression pool can be reduced, the water hammer phenomenon is suppressed, pressure oscillation in the pressure suppression pool can be effectively suppressed through the enclosure part and the steam bubble cutting part, and the pressure suppression level of the containment pressure suppression pool can be enhanced.

Description

technical field [0001] The invention relates to a suppression pipe and a suppression pool using the suppression pipe, belonging 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 the condensation starts to occur at the mouth of the pressure suppression pipe, a vacuum state will be temporarily formed due to the disappearance of the bubbles and the reduction of the volume of...

Claims

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Application Information

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IPC IPC(8): G21C9/012G21C13/02
CPCG21C9/012G21C13/02Y02E30/30
Inventor 孟兆明沈格宇孙秋南张楠刘新星谢喜宾艾鹏孙中宁丁铭
Owner HARBIN ENG UNIV
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