Spent fuel storage rack in pressurized water reactor nuclear power station

Abstract

The invention relates to a spent fuel storage rack and in particular discloses a spent fuel storage rack in a pressurized water reactor nuclear power station. The storage rack comprises four enclosing plates, an upper bearing plate positioned at the tops of the enclosing plates, and a lower bearing plate and a storage sleeve which are positioned at the bottoms of the enclosing plates, wherein the enclosing plates, the upper bearing plate and the lower bearing plate form a cubic cavity; the storage sleeve is positioned in the square holes on the upper bearing plate and the lower bearing plate; base plates of the storage sleeve are positioned on the lower bearing plate; legs are fixedly connected with the lower bearing plate; thread sleeves on the legs are welded with the lower bearing plate; cylindrical convex plates are arranged at the bottoms of the thread sleeves; the upper ends of the thread sleeves are fastened with the lower bearing plate and the base plates by nuts; adjusting screws are arranged in and in threaded connection with the thread sleeves; the bottoms of the adjusting screws are freely positioned in the spherical recesses of bottom backing plates; and the base plates are provided with through holes communicated with the inside of the storage sleeve and the through holes are communicated with the through holes on the bearing plates. The storage rack has high storage capacity and good shock resistance.

Description

technical field [0001] The invention relates to a spent fuel storage grid, in particular to a nuclear power plant spent fuel storage grid. Background technique [0002] The spent fuel discharged from the reactor during the operation of the nuclear power plant is usually stored in the spent fuel storage pool of the fuel building. Almost all spent fuel assemblies in nuclear power plants are stored underwater in spent fuel storage grids, not only because water can provide operators with a cheap and transparent radiation shielding layer, but also because water can be easily exported out of spent fuel assemblies. decay heat. The early spent fuel storage grids were mainly loose-type spent fuel storage grids. The loose type grid does not contain neutron poison materials. In order to ensure that it meets the requirements of criticality, shielding and thermal engineering, its storage grid pitch is quite large. The storage capacity of the spent fuel storage pool is very limited, and...

AI Technical Summary

Problems solved by technology

[0003]The storage capacity of the traditional spent fuel storage grid is low, which cannot meet the needs of use, and the fixing method of the grid and the pool is also easy to damage the pool under earthquake conditions. Structural damage caused serious accidents

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