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Fuel-assembly deformation-quantity double-layer measuring system and method

A fuel assembly and measurement system technology, which is applied in the fields of nuclear reactor monitoring, reactors, nuclear power generation, etc., can solve problems such as detection errors, and achieve the effects of eliminating detection errors, solving the problem of poor deformation detection accuracy, and improving deformation detection accuracy.

Active Publication Date: 2017-07-07
JIANGSU NUCLEAR POWER CORP
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Problems solved by technology

[0004] During the detection of fuel assembly deformation, during the lifting and lowering of the fuel assembly by the refueling machine, due to the shaking of the fuel assembly, the use of laser measurement technology introduces detection errors

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  • Fuel-assembly deformation-quantity double-layer measuring system and method
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  • Fuel-assembly deformation-quantity double-layer measuring system and method

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Embodiment Construction

[0031] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0032] Such as figure 1 , figure 2 As shown, a fuel assembly deformation double-layer measurement system 4 provided by the present invention includes a measurement system base 403, a first layer receiving unit 401, a second layer receiving unit 402, a measurement system base 403, a second layer The transmitter unit 404 and the first layer transmitter unit 405, the measurement system base 403 is a hollow hexagon as a whole, and the measurement system base 403 is provided with upper and lower annular cavities, namely the upper annular cavity A and the lower annular cavity B , the upper annular cavity A and the lower annular cavity B communicate with the central hole C of the measurement system base body 403 . Six second-layer transmitting units 404 and six second-layer receiving units 402 are arranged in the upper annular cavity A, and each s...

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Abstract

The invention belongs to the technical field of fuel assembly measuring, and particularly discloses a fuel-assembly deformation-quantity double-layer measuring system and method. The system includes a measuring system substrate, a first-layer detection system and a second-layer detection system, an upper annular cavity and a lower annular cavity are formed in the measuring system substrate, the second-layer detection system is arranged in the upper annular cavity, and the first-layer detection system is arranged in the lower annular cavity. The method includes the steps that a refueling machine grabs a fuel assembly, and the fuel assembly is moved to be above a spent fuel pool frame; the refueling machine inserts the fuel assembly into the spent fuel pool frame; the second-layer detection system and the first-layer detection system sequentially detect two adjacent fuel-assembly frames, and the fuel-assembly deformation quantity of each fuel-assembly frame relative to the first-layer fuel-assembly frame is obtained; from the fuel-assembly deformation quantities, the maximum value is selected as the deformation quantity of the fuel assembly. The double-layer measuring system and method can eliminate errors which are introduced due to the transverse sloshing of the fuel assembly, and the measuring accuracy of the deformation quantity of the fuel assembly is improved.

Description

technical field [0001] The invention belongs to the technical field of fuel assembly measurement, and in particular relates to a double-layer measurement system and method for deformation of fuel assemblies. Background technique [0002] During nuclear power plant shutdown, unloading or loading, the deformation detection of some irradiated fuel assemblies is carried out. [0003] The fuel assembly deformation is calculated through the spatial relative position of the fuel assembly grid, and the detection equipment is a circular platform structure, in which 6 sets of laser measuring devices are arranged along the circumference. During the inspection, the inspection equipment is placed on the grid of the fuel pool; a group of fuel assemblies is grabbed by the refueling machine, dropped and lifted from the round hole in the middle of the circular platform, during which 6 sets of lasers are respectively projected on the 6 surfaces of the fuel assemblies, Through the optical pat...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/10
CPCG21C17/10Y02E30/30
Inventor 欧阳钦杨高升吕成轩
Owner JIANGSU NUCLEAR POWER CORP
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