Passive safety system and pressurized water reactor with same

Abstract

The invention discloses a passive safety system and a pressurized water reactor with the passive safety system, wherein the passive safety system comprises a passive charging and discharging system; the passive charging and discharging system comprises: a pool; a pressure vessel and reactor core, wherein the pressure vessel is immersed below the liquid level of the water tank; a primary loop is provided with an automatic pressure relief device and a passive safety injection device, a passive safety injection device is immersed below the liquid level of the water pool, an automatic pressure relief device is arranged to discharge high-pressure water / steam of the primary loop into the water pool when the automatic pressure relief device is opened, and a passive safety injection device is arranged to inject water in the water pool into the primary loop when the passive safety injection device is opened. The invention discloses a passive safety system. By arranging the passive charging anddischarging system, high-pressure water / steam in the pressure vessel can be discharged into the water pool, so that high pressure in the pressure vessel is unloaded, water in the water pool is passively injected into the pressure vessel, heat is guided out of the reactor core to the water pool, and continuous cooling of the reactor core and the pressure vessel is achieved.

Description

Technical field [0001] The invention belongs to the technical field of nuclear reactor safety, and specifically relates to a passive safety system and a pressurized water reactor having the same. 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 suspended, a large amount of decay heat will still be generated for a long time. Once the heat cannot be removed from the containment of the reactor in time, the core fuel will melt, resulting in a large amount of radioactive fission products. Release, leading to nuclear pollution. [0003] Traditional active nuclear power plants rely on AC power for core cooling, decay heat discharge, and containment cooling. When the entire plant is powered off, it cannot effectively cool the core, discharge decay heat and cool the containment. In other words, The core heat cannot be effectively conducted out of the containment vess...

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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