Airborne radioactive anti-diffusion system for underground nuclear power station

Abstract

The invention discloses an airborne radioactive anti-diffusion system for an underground nuclear power station. The airborne radioactive anti-diffusion system comprises reactor powerhouse chamber, a nuclear fuel powerhouse chamber, a nuclear auxiliary powerhouse chamber and a pressure relief chamber which are deeply buried, wherein each chamber is connected with air inlet and exhaust pipelines and corresponding equipment; a pressure monitoring sensor is arranged in each chamber; the air inlet and exhaust amount of each chamber can be controlled through a pressure signal; a negative pressure environment, relatively to the outside, of each hole, and a gradient negative pressure environment among the holes are maintained; the potential airborne radioactive leakage to the environments is prevented; the radioactive diffusion among underground chambers from a high-pollution area to a low-pollution area is prevented; meanwhile, the flow direction of exhaust air is controlled through a monitoring signal of an online radiation monitor; and different processing paths are automatically selected according to the radioactive level of the exhaust air, and thus the control on airborne radioactivity of the underground nuclear power station under the operation and accident conditions is achieved; and the airborne radioactive diffusion towards external environments is prevented.

Description

technical field [0001] The invention relates to the technical field of nuclear power technology, in particular to an airborne radioactive proliferation prevention system of an underground nuclear power plant. Background technique [0002] In the case of serious accidents in existing ground nuclear power plants, the containment is the last barrier and plays the role of radioactive containment. However, once the integrity of the containment vessel is lost, a large amount of radioactivity will be released to the environment, especially the airborne radioactivity will migrate and spread with the atmosphere, continuously expanding the scope of radioactive pollution, and greatly increasing the difficulty of cleaning up after the accident. For example, in the Fukushima nuclear accident in Japan, airborne radioactivity drifted with atmospheric movement, and then polluted a wide range of surrounding areas with rainfall, natural subsidence and other processes, causing serious radiatio...

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Problems solved by technology

In order to make full use of the advantages of underground nuclear power plants, the ventilation and exhaust systems and emission filtration systems of the original ground nuclear power plants cannot effectively control the release of radioactivity (Fukushima nuclear accident, Chernobyl nuclear accident)

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