Device and test method for testing ignition threshold of passive hydrogen recombiner for nuclear power

Abstract

The invention discloses a testing device and method of an ignition threshold of a nuclear passive hydrogen recombiner and solves the problem that the high hydrogen concentration accident of a nuclear power station cannot be comprehensively simulated in the prior art. The testing device comprises a piston mechanism, a suspending mechanism and a stainless steel crust used for blocking a flue outlet of the nuclear passive hydrogen recombiner. During introduction of hydrogen, the stainless steel crust covers the flue outlet of the nuclear passive hydrogen recombiner, thus air circulation and dehydrogenation is effectively stopped, and the interior hydrogen concentration of a reaction vessel is enabled to rise fast; after the hydrogen concentration reaches a preset value, fluid drives the suspending mechanism to move, the stainless steel crust is enabled to slide down, the flue outlet of the nuclear passive hydrogen recombiner is exposed, air circulation is allowed in the nuclear passive hydrogen recombiner, and dehydrogenation is achieved under high hydrogen concentration. The high hydrogen concentration accident of the nuclear power station is truly simulated, and excellent reference standards are provided for the study and design of the nuclear passive hydrogen recombiner.

Description

technical field [0001] The invention relates to an experimental system related to nuclear power hydrogen safety equipment, in particular to a device for testing the ignition threshold (that is, high hydrogen concentration performance) of a passive hydrogen recombiner used in nuclear power and a testing method thereof. Background technique [0002] After the Fukushima nuclear accident in Japan, more and more attention has been paid to the hydrogen risk control in the nuclear power containment, and the requirements for hydrogen safety equipment are getting higher and higher, especially whether the hydrogen safety equipment can still play a role in hydrogen control or The function of elimination has become an important assessment basis for equipment. In particular, passive hydrogen recombiners (PARs), which are the main means of hydrogen elimination, must be evaluated for their operational performance under various severe accident conditions. [0003] In general, PARs can be d...

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Problems solved by technology

Although there are researches in this area in China, due to technical limitations, it is very difficult to achieve the above test conditions. Therefore, at present, only a 1:10 scale recombiner prototype is used for high hydrogen concentration tests with little hydrogen. Usually only It can be used in laboratory research, but it cannot reflect the real hydrogen elimination performance of the passive hydrogen recombiner under the condition of high hydrogen concentration, so it is difficult to meet the needs of the current actual working conditions

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