Nuclear island containment recirculation filter

Abstract

The invention discloses a recirculation filter of nuclear island containment. The recirculation filter comprises filter units and connectors which are distributed in a matrix shape, wherein each filter unit comprise filter elements; a plurality of filter elements are distributed in an erected matrix shape to form each filter unit; each connector comprises upper connectors and lower connectors; upper ends of adjacent filter units are detachably connected through the upper connectors; each lower connector comprises an horizontal upper installation portion; lower ends of the adjacent filter units are detachably connected through the upper installation portions; the upper installation portions are bent downwards and extend to form support parts; the end of each support part is bent to form a horizontal lower fixation; due to the fact that each filter unit comprises the plurality of filter elements, the filter area and flow concentration efficiency are greatly increased; disintegrating slags can be efficiently and quickly intercepted, and the blockage can be effectively avoided; meanwhile, the plurality of filter units form an integral structure under the connection function of the connectors, the structure is stable and reliable, a load can be uniformly transmitted to the ground, and the integral bearing capacity is improved.

Description

technical field [0001] The invention relates to a filter for a nuclear power plant, in particular to a nuclear island containment recirculation filter for a nuclear power plant in a water loss accident. Background technique [0002] In the event of a loss of water accident in a nuclear power plant, a large number of thermal insulation fiber fragments and particle fragments will be formed. If these fragments enter the downstream equipment of recirculation (such as various pumps, injection nozzles, and fuel assembly inlet screens), they will cause equipment blockage accidents. The nuclear island containment recirculation filter is usually installed in the annular area of ​​the reactor building, above the suction port of the RIS / EAS (Safe Injection System / Containment Spray System) system pump, and its main function is to submerge The submerged sump filter can efficiently intercept and filter debris and ensure the filtration of the water collected in the reactor building to avoi...

AI Technical Summary

Problems solved by technology

[0004] This existing nuclear island containment recirculation filter has certain design defects, which affects its performance: some nuclear island containment recirculation filters adopt a horizontal arrangement of filter elements, because a single filter element is directly connected to the pipe connection, and the filter element is not designed to strengthen the structure, the overall strength and shock resistance of the filter element are not ideal; This reduces the difficulty of systematically arranging filters on pits; the filter elements of some filters adopt a polygonal structure, and a single filter element does not process filter holes at the bends, thereby reducing the flow area of ​​a single filter cartridge, and in The bending part is easy to affect the resistance of the fluid inside and outside the filter cartridge; when some filter elements are assembled vertically and horizontally, due to the unreasonable design of the connectors, the assembly process is complicated and the site is restricted by the receiving site, resulting in the assembly process. The resulting filter channel layout is unreasonable and inconvenient for water circulation

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