A waste heat exhaust ventilation system for dry storage of spent fuel in nuclear power plants

Abstract

The invention relates to the technical field of reactor engineering, and provides a residual heat removal ventilation system for dry storage of a spent fuel in a nuclear power station. The system comprises a natural ventilation device and a forced ventilation device, and the system specifically comprises cold air inlet cabins, hot air exhaust cabins, pipelines, ventilation heat shield cylinders, exhaust fans, and air coolers etc. arranged in a storage warehouse, an operation room, and a ventilation equipment room in a corresponding manner and with a certain connecting relation. By employing the system, the spent fuel is not stored by employing pool storage, the security of the spent fuel is not dependent on power equipment such as water pumps and fans, daily maintenance is reduced, the energy is saved, and the inherent security is provided. Besides, the system can be used for cooling storage tanks of the spent fuels in storage facilities of the spent fuels in pebble-bed high-temperature gas-cooled reactor nuclear power stations, and residual heat of the storage tanks of the spent fuels is discharged to the external environment in a combined mode of forced ventilation and natural ventilation.

Description

technical field [0001] The invention relates to the technical field of reactor engineering, in particular to a waste heat exhaust ventilation system for dry storage of spent fuel in nuclear power plants. Background technique [0002] Since the birth of nuclear power plants, various technologies have continued to develop, and they have become one of the indispensable energy sources for major countries in the world. Reactors, the core equipment of nuclear power, have developed various types including pressurized water reactors, boiling water reactors, and gas-cooled reactors. Spent fuel has two main characteristics, that is, it is radioactive and still releases decay heat, so it is necessary to set up special facilities for the storage of spent fuel. [0003] Through years of development, China has formed a complete nuclear power system, developed and introduced pressurized water reactors, heavy water reactors and other reactor types of nuclear power plants, and the storage me...

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Problems solved by technology

However, storage in pools also has certain disadvantages, that is, in the event of a water loss accident in the pool, if the spent fuel is exposed to the level, not only will it not be able to play the role of radiation shielding, but it will also deteriorate the working conditions of the spent fuel residual heat, and even lead to the loss of spent fuel. Burning and release of radioactive material

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