PWR nuclear fuel rod neutron photography detection device and detection method

Abstract

The invention relates to the detection technology of a nuclear reactor fuel rod, in particular to a pressurized water reactor nuclear fuel rod neutrongraphy detection device and detection method. The device comprises a nuclear fuel rod channel, a beam current channel and a conversion screen channel which are arranged on a shielding base, wherein the nuclear fuel rod channel is vertically arranged in the shielding base; an opening of the nuclear fuel rod channel is located at the top of the shielding base; the beam current channel is arranged in the shielding base along the direction of neutron beam current; an opening of the beam current channel is located on the side surface of the shielding base towards the neutron beam current; the beam current channel is communicated with the nuclear fuel rod channel; and the conversion screen channel is arranged in the shielding base along the direction vertical to the neutron beam current, and connected with the tail end of the beam current channel. Through the detection technology in the invention, the requirement of obtaining neutrongraphy detection imaging of the nuclear fuel rod through an indirect imaging method can be completely met.

Description

technical field [0001] The invention relates to the detection technology of nuclear reactor fuel rods, in particular to a neutron photography detection device and detection method for pressurized water reactor nuclear fuel rods. Background technique [0002] Nuclear safety is the lifeline of nuclear power development, and nuclear fuel rods are the core components of pressurized water reactors, which must be tested to ensure the safe operation of the reactor. Neutron photography technology has many advantages in the detection of nuclear fuel rods. It is an irreplaceable technical means for detecting nuclear fuel rod damage, measuring U-235 enrichment, and inspecting hydrogen accumulation in cladding. Using neutron photography to detect PWR nuclear fuel rods is a powerful non-destructive testing technique to ensure the performance of PWR nuclear fuel rods. However, since the nuclear fuel rod itself is radioactive, it is necessary to complete the detection of the nuclear fuel ...

AI Technical Summary

Problems solved by technology

However, since the nuclear fuel rod itself is radioactive, it is necessary to complete the detection of the nuclear fuel rod by neutron imaging through indirect imaging, so the technology is relatively complicated

The use of neutron photography to detect nuclear fuel rods has corresponding applications in countries with developed nuclear industries such as the United States, Europe, and Japan, but there are few published materials on the design of detection devices

my country has not yet carried out relevant experiments using neutron photography to detect PWR nuclear fuel rods, so there is no reference design experience for the relevant PWR nuclear fuel rod detection devices used for experiments

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