Liquid-immersed spent fuel storage system

Abstract

The invention relates to a liquid-immerged type spent fuel storage system, belonging to the field of nuclear power station spent fuel storage. The invention implements long-time storage of spent fuel by adopting a non-kinetic mode. A partition is in a peripherically-closed frame structure; the lower part of the partition is provided with a plurality of water through holes; the partition is immersed in a coolant; a sealed container carrying a spent fuel assembly is arranged in a spent fuel storage grid positioned on the inner side of the partition; an evaporation end of a separate cooling unit is arranged in the coolant in the region outside the partition of a spent fuel storage pool; and a condensation end of the separate cooling unit is arranged in an air cooling tower on the ground. An independently built water pool is used as the spent fuel storage pool, the coolant is used for immersing the sealed container with a spent fuel assembly, the natural circulation of the coolant in the spent fuel storage pool transfers decay heat radiated by the spent fuel to the separate cooling unit, and the separate cooling unit leads the heat out through air, thereby substituting the dry-type storage mode of the spent fuel.

Description

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AI Technical Summary

Benefits of technology

This patented technology allows for better utilization of waste materials such as used nuclear fuels or other types of wastes that have been stored temporarily without being fully consumed during their production process. By storing them within one area while also allowing it to be cooled with another type of material like water instead of gas, this method provides more reliable energy management systems compared to traditional methods.

Problems solved by technology

Technics Problem: Current methods used to store spent fuel involve shutting off from an empty tank or other source during periods when excessive temperatures can damage equipment such as pipes and valves. Dry-storage systems are more reliable but require longer times before they work effectively due to their low efficiency at removing thermal energy compared to liquid phase coolants (LPCs).

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