Novel passive safety shell energy control system

Abstract

The invention discloses a novel passive safety shell energy control system which comprises an open circulating heat exchange device, a high-position cooling water tank, a safety shell inner heat exchange device, a low-position cooling water tank and a safety shell outer heat exchange device. The high-position cooling water tank and the open circulating heat exchange device are connected to form an open circulating loop, a valve is arranged on the open circulating loop, the safety shell inner heat exchange device and the safety shell outer heat exchange device are connected to form a closed circulating loop, and a valve is arranged on the closed circulating loop. The novel passive safety shell energy control system can quickly respond to a breaking accident of a high-energy pipeline in a safety shell and can effectively guide out heat in the safety shell to inhibit rising pressure and temperature in the safety shell; a passive structure is reasonable in design, so that failing of the system can be avoided greatly, and safety and economic efficiency of a nuclear power plant are improved.

Description

technical field [0001] The invention relates to the field of nuclear power, in particular to a novel passive containment energy control system. Background technique [0002] The existing steel containment energy control system and the passive containment cooling system of the AP1000 nuclear power plant have the following technical problems: [0003] 1. The steel containment energy control system uses external submersion to export the heat inside the containment. Under the action of gravity, the water in the high-level water tank outside the containment is injected into the submerged pool outside the containment to submerge the entire steel containment. For a nuclear power plant with a large containment volume, this technology needs to be equipped with a large-volume water tank and a water pool that can accommodate all cooling water outside the steel containment, which is not economical and requires high space requirements. [0004] 2. The steel containment vessel of the AP1...

AI Technical Summary

Problems solved by technology

For a nuclear power plant with a large containment volume, this technology needs to be equipped with a large-volume water tank and a pool that can accommodate all cooling water outside the steel containment, which is less economical and requires more space.

[0004] 2. The steel containment vessel of the AP1000 nuclear power plant requires a very large free volume, and the structural size of the containment vessel is required to be very large, which increases the construction cost; in addition, the cooling capacity of the AP1000 nuclear power plant depends on the external spraying of the steel containment vessel, while The water film on the external steel wall is crucial to its heat transfer capability. Whether the water film can effectively form a certain scale has been questioned in the industry

Images