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Passive containment spraying-submerged cooling system

A passive containment and cooling system technology, applied in the field of special safety systems for nuclear reactors, can solve the problems of unfavorable earthquake resistance of shielded workshops, high construction cost and maintenance cost, improve safety and economy, low construction cost and maintenance cost, system simple effect

Inactive Publication Date: 2014-01-01
NUCLEAR POWER INSTITUTE OF CHINA
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  • Abstract
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AI Technical Summary

Problems solved by technology

[0003] Although the AP1000 unit developed by Westinghouse Corporation of the United States is designed with a passive containment cooling system, its high-level water tank has an extremely adverse impact on the seismic resi

Method used

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  • Passive containment spraying-submerged cooling system

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Embodiment Construction

[0009] The present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0010] like figure 1 As shown, a passive containment spray-submersion cooling system includes a reinforced concrete shielded factory building 3, a containment vessel 2 is arranged in the reinforced concrete shielded factory building 3, and the containment vessel 2 and the reinforced concrete shielded factory building 3 are attached below the ground level together form a steel-concrete composite structure 5, a passive containment sprinkler 1 is installed above the containment 2, a reactor 8 is installed inside the containment 2, and a steam outlet 6 is opened on the top of the reinforced concrete shielding plant 3 for safety The shell 2, the reinforced concrete shielding factory building 3 and the steel-concrete composite structure 5 form a water-tight annular space 4 above the ground level. When the spray submerged water in the water-tight an...

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Abstract

The invention belongs to an engineered safety system for a nuclear reactor, and particularly relates to a passive containment cooling system including a reinforced concrete shield factory building. The reinforced concrete shield factory building is provided with a containment, the containment and the reinforced concrete shield factory building are fixed together by a steel-concrete composite structure, a water-stop annular space is formed between the reinforced concrete shield factory building and the steel-concrete composite structure, and a passive containment spraying device is arranged above the containment. The passive containment cooling system has the advantages that short-term and long-term cooling of the containment can be realized in a passive manner when a reactor is subjected to a loss-of-coolant accident or a main steam pipeline rupture accident in superposition with a station blackout accident and other multiple extreme accidents. The annular space between the containment and the shield factory building is of a water-stop structure and can be used for collecting residual spraying water.

Description

technical field [0001] The invention belongs to an ad hoc safety system for nuclear reactors, in particular to a passive containment cooling system. Background technique [0002] As a special safety facility for nuclear power plants, the containment can protect the reactor from the hazards of external events. After the accident, as the last barrier of nuclear reactor radioactivity containment, it can protect the environment and the public from excessive radiation. When a reactor loses water accident or a main steam pipe rupture accident occurs, a large amount of mass energy is released into the containment vessel, causing the temperature and pressure of the containment vessel to rise rapidly. In order to prevent over-temperature and over-pressure of the containment, the heat of the containment must be exported in time. At present, most common nuclear power plants around the world use internal active containment spray systems to cool down and reduce pressure, and must be equ...

Claims

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Application Information

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IPC IPC(8): G21C15/18
CPCY02E30/40Y02E30/30
Inventor 秦忠宋丹戎许斌李庆
Owner NUCLEAR POWER INSTITUTE OF CHINA
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