An external nuclear power plant severe accident mitigation device and method for preventing hydrogen explosion

Abstract

The invention discloses a device and method for alleviating serious accidents in an external nuclear power station capable of preventing hydrogen blistering and provided with a carbon nano tube and metal hydride dual hydrogen storage function and belongs to the field of safety equipment and technology of a nuclear power station. The device is characterized in that the outer face of a containment shell of the nuclear power station is provided with a carbon nano tube hydrogen absorption device and a metal hydride hydrogen absorption device; during the initial period of an accident, the temperature and pressure are not high, a heat exchanger does not operate, the gas in the containment shell can pass the carbon nano tube hydrogen absorption device by virtue of a blower and then enters into the metal hydride hydrogen absorption device through a valve, so that dual absorption is performed on the hydrogen in the gas, during the middle period of the accident, after the temperature and pressure are increased, the heat exchanger operates so as to introduce the hydrogen which is cooled to a certain temperature into the carbon nano tube hydrogen absorption device; adsorption, upgrading and blast protection can be performed on the hydrogen in the containment shell, an energy transfer effect can be achieved, and serious accidents of a reactor can be restrained or retarded, the serious accidents can be alleviated, and the accident damage is reduced.

Description

technical field [0001] The invention belongs to the field of nuclear power plant safety equipment and technology, and in particular relates to an external hydrogen explosion-preventing severe accident mitigation device and method for a nuclear power plant with double hydrogen storage functions of carbon nanotubes and metal hydrides. Specifically, in the event of a serious accident exceeding the design criteria in a nuclear power plant, the characteristics of carbon nanotubes and magnesium hydrides are used to realize the absorption, mass absorption and explosion protection of hydrogen in the containment to achieve the energy transfer effect. To suppress or slow down serious accidents of reactors, so that serious accidents can be alleviated and accident hazards can be reduced. Background technique [0002] The containment vessel is the last physical barrier to contain the radioactive fission products released into the reactor coolant circuit in the event of a failure of the i...

AI Technical Summary

Problems solved by technology

When the hydrogen release rate is low, the hydrogen recombiner can eliminate hydrogen more effectively, but for continuous and rapid hydrogen release, the hydrogen recombiner's hydrogen elimination capacity is limited

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