Hydrogen-explosion-preventing serious nuclear accident relieving device and method

Abstract

The invention discloses a hydrogen-explosion-preventing serious nuclear accident relieving device and a hydrogen-explosion-preventing serious nuclear accident relieving method, and belongs to the fields of safety equipment and technology of a nuclear power station. A hydrogen adsorption device is installed on the inner wall and in an upper space of a safety shell; by using the physical adsorptionproperty of a carbon nanofiber material, the hydrogen adsorption device is used for adsorbing and storing hydrogen without the help of external power; when a large amount of hydrogen is generated in the safety shell, the hydrogen adsorption device reduces the concentration of the hydrogen in the safety shell by adsorbing the hydrogen continuously and igniting the hydrogen, so that the explosion of the hydrogen is avoided; and the pressure in the safety shell is reduced, so that the aim of relieving a serious accident of a reactor is fulfilled. In the running process of the hydrogen-explosion-preventing serious nuclear accident relieving device, the external power is not required; the device can work stably for a long time, is reliable in performance, good in spare safety, convenient to implement and easy to control and meets the design requirements of a current novel nuclear power reactor.

Description

technical field [0001] The invention belongs to the field of nuclear power plant safety equipment and technology, and in particular relates to a device and method for mitigating severe nuclear power accidents for preventing hydrogen explosions. Background technique [0002] The containment vessel is the last barrier of the nuclear reactor and has backup safety, so the control of combustible gas inside the containment vessel is an important part of severe accident management. my country's Ling'ao Phase II Project and Qinshan Phase II Expansion Project have added containment hydrogen elimination systems as an important measure to control combustible gases in the containment. The Three Mile Island accident in the United States has verified the extreme importance of containment and its safety measures for protecting nuclear power plants. In 2011, the successive hydrogen explosions at the Fukushima nuclear power plant in Japan further illustrated the importance of preventing hydro...

AI Technical Summary

Problems solved by technology

PAR adopts the passive operation mode, which is in line with the concept of simplified operation of advanced nuclear power units in the future. However, under the assumption that 100% of the fuel coating reacts with water in a serious accident, because zirconium-water reaction can quickly produce hydrogen, the system using PAR is Certain localized areas within the containment (such as the steam generator compartment) cannot prevent local hydrogen concentrations from exceeding the lower deflagration limit, and PAR is expensive

For hydrogen igniters, power supply is required, and there are disadvantages of complicated electrical wiring and the possible increase in the number of containment penetrations, and it does not fully meet the passive characteristics of third-generation nuclear power

[0011] Although new progress has been made on the PAR+hydrogen igniter solution, no matter what kind of solution it is, the cost of introduction is very expensive, and its system implementation is complicated.

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