Passive containment heat export system with flow guide structure

Abstract

The invention relates to the field of nuclear reactor passive safety systems, in particular to a passive containment heat export system with a flow guide structure. The system is arranged on the inner side and the outer side of a containment and comprises a containment inner side part and a containment outer side part, the containment inner side part is positioned at the upper part of the inner side wall of the containment; the main body comprises an inner heat exchanger and a flow guide structure; the outer side part of the containment is positioned above the outer side wall of the containment, and the main body structure comprises an external cooling water tank and a steam-water separator; the containment inner side part and the containment outer side part are connected through a pipeline and a valve. According to the gas flow distribution characteristics in the containment vessel under the accident condition, the flow guide structure is arranged near the heat exchanger to effectively improve the gas flow condition near the heat exchanger in the PCS, the deterioration influence on condensation heat exchange caused by gathering of non-condensable gas near the internal heat exchanger is reduced, and the heat exchange efficiency of the PCS is improved.

Description

technical field [0001] The invention relates to the field of nuclear reactor passive safety systems, in particular to a passive containment heat derivation system with a diversion structure. Background technique [0002] Since nuclear power generation was developed and utilized in the middle of the last century, it has continuously provided mankind with efficient and clean energy. However, due to the unique physical properties of nuclear materials and the huge impact of nuclear accidents in history on society and the environment, the safety of nuclear power has received great attention. Combined with nuclear power operation experience and technological development, the concept of passive safety systems has been introduced into the design process of many third-generation nuclear power plants. The passive safety system can use natural phenomena such as density difference and gravity difference to ensure the safety of the reactor without external power support. my country's th...

AI Technical Summary

Problems solved by technology

The existence of non-condensable gas will significantly affect the effect of condensation heat transfer and reduce the heat transfer efficiency of the heat exchanger

In existing inventions, the addition of flow guide structures to improve the gas flow conditions near the PCS internal heat exchanger and the distribution of non-condensable gases has not received enough attention, such as the patent application number CN201610801851.5 "A new type of passive Containment Energy Control System” and the patent application number CN201810662009.7 “A Closed Passive Containment Cooling System for Floating Nuclear Power Plants” both focus on strengthening the heat exchanger structure or improving the heat exchange environment to strengthen the heat exchanger. The heat transfer capacity of the system is improved, but the heat transfer is not enhanced by improving the flow field near the internal heat exchanger and the distribution of non-condensable gases

Images