An underground nuclear power plant airtight door system

Abstract

The invention discloses a sealed door system for an underground nuclear power plant, which comprises a chamber with a high radioactivity level, an isolation transition chamber and a chamber with a low radioactivity level which are sequentially connected. A hermetic door; a second airtight door is set between the isolation transition chamber and the low-radioactivity level chamber; above the first airtight door, there are first penetrating pipes communicating with the high-radioactivity level chamber and the isolation transition chamber respectively , above the second airtight door, there are second penetrating pipes respectively communicating with the isolation transition chamber and the low-radiation level chamber. The invention can effectively isolate radioactive contamination of chamber spaces with different radioactive levels while ensuring normal communication. At the same time, it can monitor the temperature, pressure, air humidity, radioactive level and other parameters of the isolation chamber space, providing environmental reference for monitoring and rescue during the accident.

Description

technical field [0001] The invention relates to nuclear power technology, in particular to an underground nuclear power plant airtight door system. Background technique [0002] After the Fukushima nuclear accident, the safety requirements for nuclear power plants have been further enhanced. Putting the nuclear power plant underground can increase the inherent safety of the nuclear power plant and increase the radiation protection barrier of the nuclear power plant. After the nuclear power plant is placed underground, it involves the isolation and communication between the underground chambers of the nuclear power plant. Especially the isolation and connection between the chamber space with high radioactivity level and the chamber space with low radioactivity under accident conditions. [0003] The existing isolation doors are simple in design (such as a radiation-proof isolation door for radiology department in China, patent number: CN201520986675.8; electric isolation do...

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Problems solved by technology

[0003] The existing isolation doors are simple in design (such as a radiation-proof isolation door for radiology department in China, patent number: CN201520986675.8; electric isolation door in China, patent number: CN201210000862.5), and it is easy to cause chamber space during use. The radioactive cross-contamination between them cannot meet the requirements of underground nuclear power plants

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