Experimental device for research on hydrogen combustion in nuclear power plant containment shell

Abstract

The invention discloses an experimental device for research on hydrogen combustion in a nuclear power plant containment shell. The experimental device comprises a safety tank, an experimental pipe section, a gas supply system, an exhaust system, a heating and heat preservation system, a spray system, a data acquisition system, a control system, an igniter and a high-speed camera. The experimental pipe section is installed inside the safety tank. A barrier which is easy to replace is arranged inside the experimental pipe section. Through the gas supply system, hydrogen, the air and water vapor are uniformly mixed in advance; and then, the safety tank or the experimental pipe section is filled with the gas mixture for a combustion experiment. The exhaust system is used for discharging exhaust gas in the experimental device. The heating and heat preservation system can control initial gas temperature. The spray system provides a spray water environment for the experimental device. The data acquisition system acquires and processes a sensor signal to obtain experimental data. Through the control system, each subsystem and equipment of the experimental device are monitored and controlled. The experimental device of the invention has advantages of high safety and multiple experimental functions, etc., and can be used for research on combustion characteristics of hydrogen in the nuclear power plant containment shell.

Description

technical field [0001] The invention relates to the technical field of hydrogen safety in the containment of nuclear power plants, in particular to an experimental device for studying hydrogen combustion in the containment of nuclear power plants. Background technique [0002] During a severe accident of a light water reactor, due to the zirconium-water reaction, the radiation decomposition of water, and the reaction between the core melt and concrete, a large amount of hydrogen will be generated into the containment and mixed with air, which is very likely to form a flammable gas mixture. Combustion or even explosion will occur under the ignition source of small energy, forming a large pressure load, which poses a great threat to the integrity of the containment, and radioactive fission products may be released into the environment, causing serious harm. In the Three Mile Island nuclear accident in the United States in 1979, the hydrogen produced by the reactor core accumul...

AI Technical Summary

Problems solved by technology

In the Fukushima nuclear accident in Japan in 2011, a large amount of hydrogen was produced in the containment, and a serious hydrogen explosion occurred in the shielded plant, which destroyed the structure of the plant, and a large amount of leaked radioactive substances caused serious pollution to the surrounding area, proving again The explosion of hydrogen gas in the event of a nuclear power plant accident may lead to serious accident consequences

A comprehensive analysis of the existing experimental devices related to the study of hydrogen combustion in the containment of nuclear power plants has the following disadvantages: the experimental section uses a single pipe or a single pressure vessel, and there is no safety protection structure outside the experimental section, so the safety is relatively low; the experimental section has a single structure, and The influence of obstacles and spraying on the combustion characteristics of hydrogen is not considered at the same time, and the experimental functions are relatively few

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