Airborne radioactivity diffusion prevention method for underground nuclear power plant

Abstract

The invention discloses an airborne radioactivity diffusion prevention method for an underground nuclear power plant. An independent radioactivity monitoring system and an air supply and exhaust system are arranged in each underground grotto, and a pressure release grotto is arranged; a radioactivity processing system is arranged in the grotto; after a nuclear system in each underground grotto leaks, the radioactivity monitoring system sends a control signal to control isolation of the grotto, so that the grotto is isolated from surrounding grottoes; meanwhile, by comparison of a pressure monitoring signal of the grotto with a pressure monitoring signal of the adjacent grotto, air exhaust of the grotto adjacent to the leaking region is controlled, so that the negative pressure environment of the grotto with the leaking region relative to the surround grottoes is retained; a radioactive airborne object is discharged to the pressure release grotto for pressure release and temporarily storage according to a requirement of a radioactivity leakage condition and then is normally emitted after meeting the standard by radioactivity treatment. By construction of entity isolation and the negative pressure environment of the underground grottoes, the radioactive airborne objects in a nuclear accident of the underground nuclear power plant can be effectively isolated and treated, and release of the radioactive airborne objects in the nuclear accident to the atmospheric environment is avoided.

Description

technical field [0001] The invention relates to the technical field of nuclear power, in particular to an airborne radiation prevention method for underground nuclear power plants. Background technique [0002] When a nuclear accident occurs in a nuclear power plant, the radioactive substances in the primary circuit will be released from the damaged primary circuit pressure boundary and containment to the external environment in the form of radioactive airborne objects. The release of radioactive airborne substances will continue to expand the scope of radioactive pollution through the migration and diffusion of the atmosphere, and then enter the ecological environment with rainfall, natural deposition and other processes, and then endanger human health through direct inhalation or ingestion. [0003] The containment of existing ground-based nuclear power plants plays a role in containing radioactivity in nuclear accidents, but once the integrity of the containment is lost, ...

AI Technical Summary

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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