A non-kinetic containment cooling system for pressurized water reactors
A containment cooling, pressurized water reactor technology, applied in cooling devices, reactors, nuclear power generation, etc., can solve the problems of low efficiency, prolonging the containment time, improving the heat load capacity of the containment, and reducing the effective volume , The effect of the compact structure of the containment vessel
Inactive Publication Date: 2017-12-22
UNIT 92609 OF PLA
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Problems solved by technology
However, according to the experimental data, there are two deficiencies in this method of heat dissipation and safety: first, because the primary circuit enters the interior of the containment in the form of jet and flash through the breach position, it can only supply air for 1-5 seconds. People take measures, the time is too short, and it is necessary to prolong the time during the accident that the pressure inside the containment is from normal to the maximum pressure it can withstand; secondly, when the pressure inside the containment rises rapidly during the accident, the temperature of the containment will not rise rapidly. Ascent, the cooling water system begins to cool the containment inefficiently
For this reason, the structural form of the containment should focus on solving the following problems: first, the transient discharge of steam in the primary circuit will not cause the pressure in the containment to exceed the limit quickly; second, the heat carrying capacity of the containment needs to be greatly improved
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Embodiment 1
[0018] Embodiment 1: A nuclear power plant has an airflow guide pipe 1, a main pipe 2, a condensation container 3, a heat exchange tube group 4, a diffuser 5, a core pit 6, an overflow pipe 7, a liquid level gauge 8, an electric switch valve 9, a guide Flow plate 10, steel containment shell 11, shell top water tank and water separator 12, etc. Two condensing containers 3 are added inside and outside the safety shell, and 4 air flow guide pipes are added in the safety shell, and the air flow guiding pipes are connected to the interior of the safety shell and the inside of the condensation container 3; Satisfying a certain volume-to-mass ratio relationship, each condensing container 3 also has an overflow pipe 7 connected to the outside of the condensing container 3, and the air flow guide pipe and overflow pipe 7 can introduce water and / or air flow into or discharge the condensing container 3; The overflow pipe 7 is connected with the liquid level gauge 8 and the electric on-of...
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The invention discloses a non-kinetic energy containment cooling system for a pressurized water reactor. The inner and outer structures of steel containment (11) are changed for realizing more effective containment for the steam in larger spraying volume, so that the safety is increased. 2-20 condensation containers (3) are added to the interior and / or exterior of the steel containment (11); the unsaturated solutions for dissolving air in proportion are contained in the condensation containers (3) and have the function of controlling the absorption for dry air in the steel containment (11).
Description
technical field [0001] The invention belongs to the field of nuclear power plant containment design, in particular to a non-kinetic containment cooling system for pressurized water reactors. Background technique [0002] As the external shielding structure of nuclear power accidents, the containment in the third-generation nuclear power technology is an important link in accident prevention and mitigation. According to the characteristic that the internal effective space of the passive containment is proportional to the thermal power, the containment has been designed and analyzed in the form of enlarged size. The size of the containment is getting larger and larger, and its investment economy, maintenance Convenience and construction cycle are very different. According to the introduction and analysis of passive containment by M. Gavrilas and Lin Chengge, it can be seen that a large amount of water will enter the containment from the primary circuit through the breach posi...
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IPC IPC(8): G21C15/18
CPCG21C15/18Y02E30/30
Inventor 李乐李成伊雄鹰孙长江周旭华桂学文张大彬王登营商学利李一术
Owner UNIT 92609 OF PLA