Hydrogen control method and oxygen consumption device in low-power reactor containment

Abstract

The invention provides a hydrogen control method in a low-power reactor containment. An oxygen consumption device is arranged in a containment, and comprises an oxygen consumption container, an oxygenconsumption inlet, an oxygen consumption outlet, a top baffle and side baffles, wherein the oxygen consumption inlet and the oxygen consumption outlet are formed in the oxygen consumption container,and the top baffle and the side baffles are respectively arranged at the top and sides of the oxygen consumption container to protect and ensure the smooth flow of a gas. The hydrogen control method in the low-power reactor containment provided by the invention timely starts the oxygen consumption device in an accident to consume oxygen in the containment so that the oxygen concentration in the containment is lower than the limit for satisfying the hydrogen combustion to achieve non-combustion environmental conditions, thus eliminating the risk of hydrogen in the containment.

Description

technical field [0001] The invention relates to a method for controlling hydrogen in the containment of a small-power reactor and an oxygen elimination device used therein. Background technique [0002] When a core melting accident occurs in a low-power reactor (electric power less than 300MW), a large amount of hydrogen is produced due to the reaction of zirconium water, and the hydrogen concentration in the containment exceeds 10%, which may cause deflagration transition and explosion. Therefore, reasonable and effective measures are needed to control the risk of hydrogen in the containment of small power reactors. For conventional pressurized water reactor nuclear power plants, hydrogen igniters or passive hydrogen recombiners (PAR) are usually used to implement hydrogen control in the containment. However, due to the small free space in the containment of low-power reactors, the recombination capacity of PAR is limited, and it is difficult to effectively arrange a suffi...

AI Technical Summary

Problems solved by technology

However, due to the small free space in the containment of low-power reactors, the recombination capacity of PAR is limited, and it is difficult to effectively arrange a sufficient amount of PAR to meet the hydrogen control capability in severe accidents; in addition, due to the small free volume in the containment, the The hydrogen concentration in the lower containment vessel rises rapidly, and the use of an igniter may cause deflagration or explosion of hydrogen gas, and the igniter may generate harsh environmental conditions in the containment vessel, which poses challenges to related equipment in the containment vessel

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