Spent fuel pool volume expanding method

Abstract

The invention provides a spent fuel pool volume expanding method. The spent fuel pool volume expanding method comprises the steps that after a plugging part in a II-zone grid frame of a spent fuel pool is taken out, spent fuel assemblies are stored in corresponding storage cavities in the II-zone grid frame; the spent fuel assemblies are provided with inserted neutron absorption assemblies. According to the spent fuel pool volume expanding method, denser spent fuel storage can be achieved by inserting the inserted neutron absorption assemblies in a part of the spent fuel assemblies of the II-zone grid frame, and the spent fuel pool volume expanding method has higher critical safety and lower manufacturing cost.

Description

technical field [0001] The invention relates to the storage of spent fuel in nuclear power plants, in particular to a method for expanding the capacity of a spent fuel pool. Background technique [0002] The spent fuel pool is an intermediate storage place for the spent fuel assemblies unloaded from the nuclear island before being transported to the spent fuel reprocessing plant, and is an important part of the nuclear power plant. The spent fuel unloaded from the nuclear power plant reactor every year is about 30% to 40% of the total reactor charge. The spent fuel assembly unloaded from the core is highly radioactive and continues to release heat, so it needs to be stored in the spent fuel pool for a certain amount of time. After a period of time (usually 10 years), it can be transported to the spent fuel reprocessing plant for processing. [0003] Since there is no mature long-term storage facility for spent fuel in China, improving the on-site storage capacity of spent f...

AI Technical Summary

Problems solved by technology

In the third-generation nuclear power AP1000 support project, in order to meet the requirements of China's nuclear safety guidelines HAD102 / 15, the spent fuel storage grid has sealed off the storage cavity of the grid in Zone II, which can only meet the storage of 9 times of balanced refueling theoretically. capacity requirements, resulting in the failure of the spent fuel pool to fully utilize its storage capacity

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