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X-ray detecting compensation block and detecting method for end weld joint of fuel rod

A detection method and fuel rod technology, which are applied in measuring devices, analyzing materials, and using radiation for material analysis, etc., can solve the problems of inability to perform ray detection, penetration thickness, and large scattered ray images

Pending Publication Date: 2019-03-26
CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At this time, the ray beam needs to pass through the entire annular fuel element from the axial direction, and the penetration thickness and scattered ray images are too large for ray detection

Method used

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  • X-ray detecting compensation block and detecting method for end weld joint of fuel rod

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Embodiment Construction

[0035] The present invention will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

[0036] Such as figure 2 As shown, a fuel rod end weld X-ray detection compensation block is used to detect the girth weld between the fuel rod end plug 9 and the fuel rod inner cladding tube 6 . The compensation block 8 is a cylindrical structure, and a variable-diameter channel is processed inside the compensation block 8 . The reducing channel is coaxial with the compensating block 8 . The diameter of the compensation block 8 is not greater than 25mm.

[0037] The left side opening of the reducing channel is on the left end face of the compensation block 8 , and the right side opening is on the right end face of the compensation block 8 . The reducing channel includes section A, section B and section C from left to right. The section A is an equal-diameter circular hole, the diameter of which is equal to the inner diameter of t...

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Abstract

The invention relates to the technical field of nondestructive detecting, and particularly discloses an X-ray detecting compensation block and detecting method for an end weld joint of a fuel rod. Thedetecting method adopts the compensation block for detecting and comprises the following steps that (1) the fuel rod is compensated; (2) detecting preparation is conducted; and (3) ray detecting is conducted. According to the X-ray detecting compensation block and the detecting method for the end weld joint of the fuel rod, radiographic sensitivity of the end weld joint is less than 2%, radiographic sensitivity meets the nuclear power safety technical requirement stipulation, the defects of the end weld joint and the defects in the thermal impact zone can be effectively evaluated, and guarantee is provided for safe operation of a reactor.

Description

technical field [0001] The invention belongs to the technical field of non-destructive testing, and in particular relates to an X-ray detection compensation block and a detection method for a fuel rod end weld seam. Background technique [0002] At present, conventional X-rays and γ-rays are mainly used in the radiation detection of nuclear fuel elements. Reactor components are made by packing pellets into small-diameter thin-walled tubes in a certain order, and then sealing and welding with end plugs at both ends. The quality of welding is very high, and it is often required to use radiographic methods to detect welds, and To achieve high detection sensitivity. [0003] As an innovative element, the annular fuel element can greatly improve the heat transfer efficiency of the fuel element, reduce the temperature of the fuel pellet, and significantly improve the safety and economy of nuclear power. It is one of the important development trends of advanced fuel for PWR nuclea...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N23/04
CPCG01N23/04G01N2223/03G01N2223/1016G01N2223/30G01N2223/629G01N2223/646Y02E30/30
Inventor 张小刚葛腾郑赛春郭梦雅孙有文高崇姜怀花丛林
Owner CHINA NUCLEAR BAOTOU GUANGHUA CHEM IND
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