Refueling and loading method of pressurized water reactor core with alternative lifetime length

Abstract

The invention belongs to the technical field of reactor design, and relates to a refueling and loading method of a pressurized water reactor core with alternative lifetime length. According to the refueling and loading method, in order to achieve long lifetime circulation, when refueling is conducted, 72-80 groups of fuel assemblies which have the longest burning time in 170-180 groups of fuel assemblies of the reactor core are replaced with new fuel assemblies; in order to achieve short lifetime circulation, when refueling is conducted, 60-68 groups of fuel assemblies which have the longest burning time in 170-180 groups of fuel assemblies of the reactor core are replaced with new fuel assemblies, when the fuel assemblies are replaced, the new fuel assemblies are placed at a secondarily outer circle of the reactor core and at the position close to the center of the reactor core, and burned fuel assemblies are placed at other positions of the reactor core. By the adoption of the refueling and loading method of the pressurized water reactor core with the alternative lifetime length, the purpose can be achieved that the lifetime length of the pressurized water reactor core is alternative and/or adjustable, and on the basis of the alternative and/or adjustable lifetime length of the pressurized water reactor core, overlong lifetime circulation and ultrashort lifetime circulation can be further achieved.

Description

technical field [0001] The invention belongs to the technical field of reactor design, and relates to a fuel refueling and loading method for a pressurized water reactor in which the service life of a pressurized water reactor is alternated. Background technique [0002] The core composed of 177 sets of fuel assemblies currently adopts a balanced cycle, that is, a fuel management scheme with a constant cycle length of 18 months. According to this kind of fuel management plan, in the actual operation of nuclear power plants, it is inevitable to require the unit to arrange shutdown for refueling and maintenance in summer. However, June to September is the peak period of electricity consumption, and there is bound to be a problem that the power generation of this type of nuclear power plant cannot meet the demand of the grid in summer, resulting in a decline in the economic benefits of nuclear power plants. Therefore, it is obviously not suitable for the actual operation of nu...

AI Technical Summary

Problems solved by technology

However, June-September is the peak period of power consumption, and there is bound to be a problem that the power generation of this type of nuclear power plant cannot meet the demand of the grid in summer, resulting in a decline in the economic benefits of nuclear power plants.

Therefore, it is obviously not suitable for the actual operation of nuclear power plants to adopt the constant 18-month life length of the balance cycle.

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