Spent fuel storage pool bottom scrubbing device

Abstract

The invention relates to a spent fuel storage pool bottom scrubbing device comprising a travel system arranged on the pool bottom; the travel system comprises a seal housing, and a filtering system is arranged in the seal housing; a suction system is arranged outside the seal housing; the top of the suction system penetrates the seal housing and is connected with a liquid inlet arranged on the top of the filtering system; an evacuation system is arranged in the seal housing, a liquid inlet end of the evacuation system is connected with a liquid outlet arranged on the bottom of the filtering system, and a liquid outlet end penetrates the seal housing and is connected with the spent fuel pool. The pollution discharge device can prevent radioactive substance from hurting human body; the scrubbing device has less dynamic components, and only uses one power supply driving so as to realize sucking and filtering functions in traveling on the poll bottom; the scrubbing device can fast replace a filter core in the water, realizes safety unkeep and water leave evacuation functions, is simple in structure, and high in reliability.

Description

technical field [0001] The invention belongs to the field of decontamination, and in particular relates to a decontamination device for the bottom of a spent fuel storage pool, which is mainly used for removing solid dirt deposited on the bottom of the spent fuel storage pool. Background technique [0002] In the nuclear field, fuel rods that cannot be reused after burning are called "spent fuel". Before being processed or disposed of, spent fuel needs to be temporarily stored in a spent fuel storage pool more than ten meters deep to shield the strong radioactivity of spent fuel and prevent it from causing harm to the environment or the human body. After a period of storage, spent fuel releases radioactive contamination into the pool water, such as ions, particles or fine debris. The lighter ones are suspended in the pool water and removed by the pool water circulation filtration system, thereby reducing the radioactive level of the pool water and keeping the radioactive le...

AI Technical Summary

Problems solved by technology

[0007] 1) Usually the water depth is more than ten meters. Although the water body is clear to the bottom, the water resistance and bending deflection of the connection or control device extending into the bottom of the pool are very large when moving in the water, and its refraction effect is obvious, which is not conducive to control and observation

[0008] 2) Most of the space at the bottom of the pool is occupied by spent fuel assemblies and their grids, and only a circle around the bottom of the pool is exposed (see attached Image 6 , 7 ), so there is little room for movement to get the job done

[0009] 3) Spent fuel has strong radioactivity, and general electronic power components will be damaged or cannot be used normally

Images