Passive condenser of nuclear power plant

Abstract

The invention discloses a passive condenser of a nuclear power plant, which comprises an upper collecting pipe, wherein a plurality of heat exchange pipe steam inlets are arranged in the upper collecting pipe, one end of the upper collecting pipe is of an opening structure, the other end of the upper collecting pipe is of a closed structure, and one end of the opening structure is fixedly connected with a first joint; a first flange which is provided with first through holes, wherein the first through holes are arranged at the heat exchange pipe steam inlets and are fixedly connected with theupper collecting pipe, and the first through holes are communicated with the steam inlets; a lower collecting pipe, which is provided with a plurality of heat exchange pipe condensate return ports, wherein one end of the lower collecting pipe is of an opening structure, the other end of the lower collecting pipe is of a closed structure, and one end of the opening structure is fixedly connected with a second joint; a second flange which is provided with second through holes which are arranged at the heat exchange pipe condensate return ports and are fixedly connected with the lower collectingpipe, and the second through holes are communicated with the condensate return ports; a heat exchange pipe bundle which comprises a plurality of heat exchange pipes, the heat exchange pipe comprise anupper inclined section, a middle connecting section and a lower inclined section, the upper inclined section is fixedly connected with the first flange, and the lower inclined section is fixedly connected with the second flange.

Description

technical field [0001] The invention relates to a passive containment heat export system of a nuclear power plant, and more specifically, the invention relates to a passive condenser of a nuclear power plant. Background technique [0002] Traditional active nuclear power plants rely on external power sources for core cooling, decay waste heat, and containment cooling. When the nuclear power plant is completely powered off, the above-mentioned heat cannot be exported to the containment, which may lead to serious safety accidents. After the Fukushima nuclear accident, passive containment heat removal systems have been extensively studied and applied. [0003] The passive containment heat export system includes evaporators, condensers, cooling water tanks, risers, downcomers, and gas collectors. The condenser is the core equipment of the system and plays a decisive role in the realization of the system's functions. [0004] The existing passive condenser adopts the structure o...

AI Technical Summary

Problems solved by technology

The thickness of the tube sheet and the spherical head is often large under the condition that the strength requirements are met, and 6 girth welds are required. The tube sheet and the spherical head are processed by forgings, which makes the processing technology of this structure more complicated and the manufacturing cost is high.

After the heat exchange tube and the tube sheet are welded, 100% radiographic inspection cannot be carried out, and there are large openings in the spherical head, the flange seal is easy to leak, and there is a sudden change in the force

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