Nuclear reactor long-life neutron source device and using method

Abstract

The invention discloses a nuclear reactor long-life neutron source device and a using method, the device comprises a neutron source assembly capable of installing a long-life neutron source in a sealing mode, and the neutron source assembly is connected with a reactor control rod driving mechanism. The neutron source assembly is inserted into or pulled out of a reactor core through the reactor control rod driving mechanism; the long-life neutron source can be an americium-beryllium source or a plutonium-beryllium source. According to the invention, the consumption of the neutron source material during the operation of the reactor can be obviously reduced, and the long-life characteristic of the neutron source material is maintained, so that the neutron source material can be repeatedly used in one or more units, and the uncertainty of the project cost and project progress of primary neutron source material purchase of each newly built nuclear power plant unit in China is avoided.

Description

technical field [0001] The invention belongs to the technical field of nuclear reactor fuel, in particular to the technical field of reactor neutron sources. Background technique [0002] There are two start-up methods for PWR nuclear power plants in operation and under construction in China, with external neutron source and without external neutron source. The pressurized water reactor nuclear power plants designed by China, the United States or France are all designed to start with an external neutron source. [0003] For reactor designs with external neutron sources, the role of the neutron source is to provide a basic neutron count level during the process of reactor charging to criticality, so as to ensure the normal operation of the source-range detectors and to respond to the core breeding neutrons, to overcome The blind area of ​​the source range detector ensures that the reactor has sufficient neutron count rate in the subcritical state for critical safety supervis...

AI Technical Summary

Problems solved by technology

[0005] 1) 252 The half-life of Cf is about 2.635 years, and generally it can only be used for the start-up of one unit;

[0006] 2) 252 Cf production relies on ultra-high-flux reactors, and domestic production conditions are not available;

[0007] 3) 252 Cf international procurement costs continue to increase, leading to an increase in the cost of nuclear power plant projects;

[0008] 4) Affected by the international situation, as well as Russia 252 The impact of Cf production capacity shrinkage is difficult to guarantee 252 The adequacy and progress of the supply of Cf neutron sources brings uncertainty to the construction progress of nuclear power plants

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