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Passive containment cooling system keeping dynamic circulation of cooling water

A passive containment and dynamic circulation technology, applied in cooling devices, nuclear power generation, climate sustainability, etc., to achieve the effects of improving reliability, avoiding dry spots, and improving heat transfer capacity

Active Publication Date: 2015-09-23
CHINA NUCLEAR POWER ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These systems either use a special static water source, or use an emergency access water source. The technical solution of the present invention adopts the operation mode of maintaining the spraying of the containment during the system standby period, which is unprecedented in the design of similar systems

Method used

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  • Passive containment cooling system keeping dynamic circulation of cooling water
  • Passive containment cooling system keeping dynamic circulation of cooling water
  • Passive containment cooling system keeping dynamic circulation of cooling water

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Embodiment Construction

[0021] The present invention will be described in detail below in conjunction with the accompanying drawings and embodiments.

[0022] Such as figure 1 As shown, a passive containment cooling system for maintaining dynamic circulation of cooling water includes a steel containment vessel 1 arranged in a shielded building 2, and an air baffle 16 is arranged inside the air inlet 17 of the shielded building, and the shielded The upper part of the plant building 2 is provided with a roof-mounted water tank 3, and the containment spray pipeline 4 arranged above the steel containment vessel 1 is connected to the roof-mounted water tank 3. The containment sprinkler pipeline 4 is connected with the generalized passive fluid control unit 5 and the sprinkler head 6 connected to form a spray path, the generalized passive fluid control unit 5 is kept normally open, so that the water source in the top water tank 3 can continue to spray through the spray path, and the spray water forms on th...

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Abstract

The invention belongs to a containment cooling system design for a nuclear power plant and particularly relates to a passive containment cooling system keeping dynamic circulation of cooling water. The system structurally comprises a steel containment which is arranged in a shield building, wherein a top water tank is arranged in the upper part of the shield building; a containment spray pipeline arranged above the steel containment is connected with the top water tank; the containment spray pipeline is connected with a generalized passive flow control unit and a shower nozzle to form a spray path; the generalized passive flow control unit is normally open, so that the spray process of a water source in the top water tank through the spray path is continuously processed, and the spray water forms a liquid membrane on the outer surface of the containment and is gathered and conveyed to the top water tank through a water return pipeline. According to the system provided by the invention, the heat exchanging capacity of the containment cooling system is relatively strong, so that start and operation of the system are of relatively high reliability.

Description

technical field [0001] The invention belongs to the design of a containment cooling system of a nuclear power plant, and in particular relates to a passive containment cooling system for maintaining dynamic circulation of cooling water. Background technique [0002] AP1000 is the third-generation nuclear power system developed by Westinghouse Corporation of the United States. Its passive containment cooling system (PCS) is used to depressurize the containment and export reactor waste heat in case of an accident. It is one of the core safety systems of nuclear power plants. AP1000-PCS has passive characteristics. It utilizes the gravity downspray of cooling water and the thermal pressure ventilation effect of the flow field near the containment to realize heat export, which has high reliability. However, the start of the spraying process is not passive. It is restricted by various conditions. The electric / pneumatic shut-off valve needs an external power supply / power source fo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C15/18
CPCG21C15/18Y02E30/30
Inventor 韩旭封有才李军马卫民元一单李春
Owner CHINA NUCLEAR POWER ENG CO LTD
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