Passive containment heat removing-out system and pressurized water reactor

Abstract

A passive containment heat removal system, control method thereof and pressurized water reactor; the passive containment heat removal system comprises an outer containment (2), an inner containment (1), an air duct (200) defined between the inner containment (1) and the outer containment (2) having an air inlet (4) and an air outlet (5), a spraying assembly (10) disposed outside the inner containment (1), a built-in heat exchanger (9) disposed in the inner containment (1), an air cooling channel (171) located outside the outer containment (2) having an air inlet (18) and air outlet (21) of an air cooling channel (171), and an external air cooler (12) disposed in the air cooling channel (171); the inlet of the external air cooler (12) is connected to the outlet of the built-in heat exchanger (9) via a first communication pipe (13), and the outlet of the external air cooler (12) is connected to the inlet of the built-in heat exchanger (9) via a second communication pipe (14).

Description

technical field [0001] The invention relates to the technical field of nuclear reactor safety, in particular to a passive containment heat derivation system for nuclear reactors and a pressurized water reactor with the system. Background technique [0002] Nuclear reactors are different from conventional heat sources. Even after the reactor is completely shut down and the chain nuclear reaction is stopped, a large amount of decay heat will still be generated for a long time. Once the heat cannot be exported to the containment of the reactor in time, the core fuel will melt, resulting in a large amount of radioactive fission products. released, resulting in nuclear contamination. [0003] Traditional active nuclear power plants rely on AC power for core cooling, decay heat removal, and containment cooling. When the nuclear power plant is completely powered off, it cannot effectively cool the core, discharge decay heat, and cool the containment. In other words, The core heat ...

AI Technical Summary

Problems solved by technology

[0002]Nuclear reactors are different from conventional heat sources. Even after the reactor is completely shut down and the chain reaction is stopped, a large amount of decay heat will still be generated for a long time. Once the heat cannot be exported in time, the safety of the reactor Shell, the core fuel will melt, resulting in a large release of radioactive fission products, leading to nuclear pollution

[0003]Traditional active nuclear power plants rely on AC power for core cooling, decay heat removal and containment cooling. Cooling the core effectively, removing the decay heat and cooling the containment vessel, in other words, the heat from the core core cannot be efficiently conducted out of the containment vessel, which may lead to serious safety accidents

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