Fuel ball bidirectional ball-passing test device of butt assembly type ball bed high temperature gas-cooled reactor

A high-temperature gas-cooled reactor and detection device technology, which is applied in the direction of reducing greenhouse gases, monitoring of reactors and nuclear reactors, etc., to achieve the effects of high magnetic circuit coupling efficiency, reduction of radiation pollution, and convenient disassembly and assembly.

Inactive Publication Date: 2008-05-07
TSINGHUA UNIV
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Problems solved by technology

[0011] In order to solve the deficiencies of the existing ball passing detection device, the present invention especially provides a pair-mounted pebble bed high temperature gas-cooled reactor fuel ball bidirectional ball passing detection device

Method used

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  • Fuel ball bidirectional ball-passing test device of butt assembly type ball bed high temperature gas-cooled reactor
  • Fuel ball bidirectional ball-passing test device of butt assembly type ball bed high temperature gas-cooled reactor
  • Fuel ball bidirectional ball-passing test device of butt assembly type ball bed high temperature gas-cooled reactor

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Embodiment Construction

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] The principle of the two-way ball passing detection of the present invention is shown in FIG. 1 . The excitation unit 8 generates a sinusoidal AC excitation signal and outputs it to the excitation coil 1 of the sensing unit 9 to generate an alternating magnetic field. The magnetic field is coupled to the two opposite detection coils 2 and 3 through the steel tube 6 and the helium in the tube, and an induced voltage is generated thereon. The winding parameters of the two detection coils 2 and 3 are consistent, and when no fuel ball 7 passes through, a sinusoidal AC voltage signal V with equal amplitude and the same frequency as the excitation signal is induced on it. A , V B . When a fuel ball 7 passes by, due to the conductivity of graphite, an eddy current is induced on the fuel ball, causing the voltage of the detection co...

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Abstract

The invention relates to a dual-way passing detector of opposite-mounted sphere bed high temperature gas-cooled reactor fuel sphere, comprising an exciting unit, a sensing unit and a signal conditioning unit, wherein, the sensing unit comprises an exciting coil and two detection coils; the exciting coil and the detection coils are symmetrically arranged on two sides of a sphere conveying steel tube; signal power of sinusoidal voltage is amplified by the exciting unit and transmitted to the exciting coil of the sensing unit; the two detection coils of the signal conditioning unit and the sensing unit are connected, two ways of voltage signal of the detection coils are calculated and processed, and sine-wave voltage signal indicating sphere passing and passing direction is outputted; non-contact detection is adopted for detecting radioactive fuel sphere. The invention has the advantages of high signal-to-noise ratio of output signal, strong interference resistance, high resolution for continuous passing and passing of more than half a sphere as well as simple structure, convenient installation without damage to sphere conveying steel tube in construction.

Description

technical field [0001] The invention belongs to the technical field of component detection, and in particular relates to a two-way ball passing detection device for fuel balls of a pair-mounted pebble bed high-temperature gas-cooled reactor. Background technique [0002] The pebble bed high-temperature gas-cooled reactor uses spherical graphite fuel elements, and the fuel-coated particles are dispersed in graphite spheres with a diameter of about 60mm. These fuel balls are loosely piled up in the core, and the fuel loading and unloading system realizes non-stop loading and unloading of fuel during the operation of the reactor. Therefore, it is necessary to continuously and accurately judge, record and count the number of fuel balls passing through each pipeline in the fuel handling system to ensure the normal and safe operation of the reactor. [0003] At present, there are mainly two types of fuel ball detection devices used in pebble bed piles: the penetrating piece type ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G21C17/06
CPCY02E30/30
Inventor 孙振国李东陈强李圣伟
Owner TSINGHUA UNIV
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