Sea surface nuclear power plant steel containment suppression heat extraction device flushed by seawater

By setting up a seawater shower device outside the containment shell of the sea surface nuclear power device and using seawater to exchange heat with the outer wall of the containment shell, the problem of rapid increase in the temperature and pressure of the sea surface nuclear power device in the accident was solved, long-term heat removal and pressure control were achieved, and the integrity of the containment shell was ensured.

CN119650109AActive Publication Date: 2025-03-18NUCLEAR POWER INSTITUTE OF CHINA
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Patent Information

Application Number
CN202411523439.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-10-30
Publication Date
2025-03-18
Estimated Expiration
2044-10-30

AI Technical Summary

Technical Problem

When a sea surface nuclear power unit suffers from a water loss accident or a steam pipeline breaks, the temperature and pressure of the containment shell rise rapidly. The existing pressure suppression water tank can only be used for short-term pressure suppression, and cannot solve the problems of heat discharge and pressure control in the long run.

Method used

A steel confinement and heat removal device for sea surface nuclear power device is designed to be washed with sea water. By setting up a sea water shower device outside the confinement, heat exchange is used to transport heat with the outer wall of the confinement, heat inside the confinement is brought out and pressure is reduced.

Benefits of technology

It realizes the long-term heat removal of the containment in the accident situation, limits the increase in pressure, ensures the integrity of the containment, and reduces the burden of design and operation and maintenance.

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Abstract

The invention provides a sea surface nuclear power plant steel containment pressure suppression and heat extraction device showered by ocean. The sea surface nuclear power plant steel containment pressure suppression and heat extraction device comprises a seawater showering device, a containment, a pressure vessel, a steam generator and a pressure stabilizer, wherein the pressure vessel, the steam generator and the pressure stabilizer are arranged in the containment; the seawater showering device is connected into the ocean, so that the outer wall of the containment is showered by utilizing the ocean in the ocean; the pressure container is connected with the steam generator and the pressure stabilizer through a main pipeline, and a main pump is further arranged on the main pipeline between the pressure container and the steam generator. The characteristics of good heat conductivity and the like of the ocean infinite heat trap and the steel containment are fully utilized, the seawater shower device is arranged outside the containment, and heat exchange between high-temperature steam in the containment and seawater outside the containment is realized under the accident condition, so that heat of the containment is taken out in a long-term stage, and the integrity of the containment is ensured.
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