PWR nuclear fuel rod neutron photography detection device and detection method

A technology for nuclear fuel rods and detection devices, applied in reactors, nuclear engineering, nuclear power generation, etc., can solve the problems of complex technology, lack of design experience, and few public releases of detection device design data, and achieve simple and easy methods and convenient access Effect

Active Publication Date: 2011-12-14
CHINA INSTITUTE OF ATOMIC ENERGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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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 s

Method used

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  • PWR nuclear fuel rod neutron photography detection device and detection method
  • PWR nuclear fuel rod neutron photography detection device and detection method
  • PWR nuclear fuel rod neutron photography detection device and detection method

Examples

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Embodiment

[0025] Taking the nuclear fuel rods of a pressurized water reactor as an example, the nuclear fuel rods enter the shielding base through the opening of the nuclear fuel rod channel 1 on the shielding base, thereby entering the neutron beam for exposure. The shielding base is rectangular, and the nuclear fuel rod passage 1 is located at the center of the shielding base, vertically downward; the nuclear fuel rod passage 1 is a hollow cylindrical structure with a diameter of 3.5 cm (matching with the handle size of the transfer container); the nuclear fuel rod passage 1 The opening position is the top of the shielded container, and the depth is 25cm. Because it is required that the nuclear fuel rods can all be located in the neutron beam during the second imaging, the nuclear fuel rods must all be located in the passage of the nuclear fuel rods during the second imaging. When the depth is 2cm (the distance between the beam opening and the top of the shielding base)+20cm (the heigh...

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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 ...

Claims

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Application Information

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IPC IPC(8): G21C17/06
CPCY02E30/30
Inventor 魏国海韩松柏郝丽杰武梅梅贺林峰王雨刘蕴韬王洪立孙凯吴立齐
Owner CHINA INSTITUTE OF ATOMIC ENERGY
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