Reactor melt retention apparatus

Abstract

The invention relates to a reactor melt retention apparatus. The apparatus comprises a catcher shell, a catcher sealing device, a buffer area, a sacrificial material area, a heat insulation layer and a water inlet device. A sacrificial material is used to dilute a melt in order to reduce the heat flow density, and passively cooled melt retention in a channel between the catcher shell and the heat insulation layer is used to realize melt retention under severe accidents in order to alleviate severe accidents, avoid large-scale release of radioactive fission products and reinforce the safety performances of reactors, so the large-scale passive pressurized water reactor severe accident alleviation capability is enhanced.

Description

technical field [0001] The present application relates to a reactor melt retention device, and more particularly, to a wet reactor passive melt retention device. Background technique [0002] The descriptions in this section merely provide background information related to the present application and in no way should be construed as admissions of any prior art. [0003] With the advancement of the research and development of the third generation of high-power reactors in China, the AP and CAP series of high-power reactors that my country mainly promotes have many controversies in terms of severe accident mitigation technologies, especially more questions have been raised about in-reactor retention and out-of-reactor retention. [0004] At present, AP or CAP series reactors adopt IVR (In-Vessel Retention) technology as a severe accident mitigation measure. For AP or CAP series reactors, when the core cannot be effectively cooled under an accident, after the core reaches a ce...

AI Technical Summary

Problems solved by technology

However, as the power of the reactor increases, the failure probability of the pressure vessel increases. Once the melt leaks, there will be reactions outside the reactor, such as the reaction between the melt and the coolant, the reaction between the melt and concrete, and the hydrogen explosion. These phenomena will seriously threaten the containment. The integrity of the fission products will eventually lead to a large-scale release of fission products, which will have a huge impact on the environment

Images