Vapor-water conversion type bubbler of nuclear power station

Abstract

The invention discloses a vapor-water conversion type bubbler of a nuclear power station. The device comprises a water inlet chamber (2), a contraction chamber (4), a mixing chamber (5), a boosting chamber (6) and a bubbling chamber (7) which are connected in sequence, wherein a vapor inlet pipeline (1) is inserted into the water inlet chamber (2), an outlet of the vapor inlet pipeline (1) is connected with an inlet of a contraction and enlargement nozzle (9), the inlet and the outlet of the contraction and enlargement nozzle (9) are slightly contracted, and an outlet of the contraction and enlargement nozzle (9) is arranged in a contraction chamber (4) of the bubbler. According to the invention, a vapor-liquid two-phase mixed boosting principle is utilized; after the vapor is acceleratedthrough the contraction and enlargement nozzle, water around is sucked into the mixing chamber to complete the condensation process, enters the bubbling chamber through the pressure boosting chamber and finally uniformly enters the water tank after the flow speed is reduced through the small holes in the bubbling chamber, pressure oscillation generated by condensation of steam in the water tank isavoided, meanwhile, water mixing is enhanced, and the safety of equipment is improved.

Description

technical field [0001] The invention belongs to the field of pressure relief systems of nuclear power plants, in particular to the technical field of pressure relief devices for containment refueling water tanks. Background technique [0002] The phenomenon of steam jetting into supercooled water for direct contact condensation is common in many industrial occasions. Because steam immersion in supercooled water jet condensation has efficient mixing and heat transfer capabilities, it is widely used in chemical industry, electric power, metallurgy, refrigeration, military industry and nuclear industry. It has been widely used in industry and other fields, such as direct contact heat exchanger, steam jet pump, underwater propulsion system, especially the pressure relief system of PWR. The pressure relief of the bubbler in the refueling water tank in the containment of the third-generation passive PWR adopts the mechanism of steam jet condensation and heat exchange. The design o...

AI Technical Summary

Problems solved by technology

In particular, the pressure oscillation generated by the condensation process brings challenges to the analysis of the impact on the equipment in the water tank. At present, no satisfactory analysis method has been formed. Therefore, it is necessary to spend a lot of manpower and material resources to verify the impact of pressure oscillation through experimental methods.

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