Completely passive cooling system for reactor core after accident of large-scale pressurized water reactor nuclear power plant

摘要

A passive cooling system for a reactor core of a large-scale pressurized water reactor nuclear power plant includes a shield building having an outer wall and a through air inlet arranged on an upper part of the outer wall, a water tank arranged at an upper part of the shield building, a cooling water distribution plate arranged above a top of a containment within the shield building, a spray pipe arranged at an inside of the top of the shield building and having a water inlet end and a water outlet end, wherein the water inlet end is connected to a bottom of the water tank and the water outlet end is extended to be above the cooling water distribution plate, and an air deflector arranged between the shield building and the containment and having an upper end connected to an inside of the top of the shield building.

主权项

1. A completely passive cooling system for a reactor core after an accident of a large-scale pressurized water reactor nuclear power plant, comprising:
a shield building having an outer wall and a through air inlet arranged on an upper part of the outer wall; a water tank arranged at an upper part of the shield building; a cooling water distribution plate arranged above a top of a containment within the shield building; a spray pipe arranged at an inside of the top of the shield building and having a water inlet end and a water outlet end, wherein the water inlet end is connected to a bottom of the water tank and the water outlet end is extended to be above the cooling water distribution plate; and an air deflector arranged between the shield building and the containment and having an upper end connected to an inside of the top of the shield building, wherein a smokestack is arranged on a top of the shield building with a steel-concrete composite structure, wherein the water tank is arranged around the smokestack, and wherein the shield building comprises a double-layer steel-concrete composite structure top which is a double layer structure and is formed on an upper end of a cylindrical steel-concrete composite structure, while a cylindrical steel-concrete air flow passage is formed on the double-layer steel-concrete composite structure top, and the double-layer steel-concrete composite structure top forms the water tank; wherein a ratio of a spacing between the air deflector and an inside of the containment to a spacing between the air deflector channel and an outside of the shield building is in the range of 0.15-1:1.