Deformation measurement device and method for fuel assemblies

A fuel assembly and measuring device technology, which is applied in measuring devices, instruments, nuclear power generation, etc., to achieve the effect of shortening the measurement period and making the operation simple and fast
CN104751918AActive Publication Date: 2015-07-01CHINA NUCLEAR POWER OPERATION TECH +1
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
CHINA NUCLEAR POWER OPERATION TECH
Publication Date
2015-07-01

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Abstract

The invention belongs to the field of shape deformation analyzing and ultrasonic ranging of fuel assemblies in a nuclear power plant, in particular to a deformation measurement device and a deformation measurement system for fuel assemblies. The device comprises a fuel assembly, an upper supporting fixing clamp plate, an extending supporting frame, a probe tray carriage, spent fuel pool gate channels and a plurality of probes; the upper supporting fixing clamp plate and the extending supporting frame integrally form a perpendicular supporting frame, the upper supporting fixing clamp plate is fixed on the upper part of one spent fuel pool gate channel, the extending supporting frame is fixed on the inner side of the spent fuel pool gate channel, the probe tray carriage is arranged on the extending supporting frame and can slide vertically along the extending supporting frame, the plurality of probes are fixed on the probe tray carriage, and the fuel assembly is located between the two spend fuel pool gate channels. According to the deformation measurement device, in a high-radiation environment, the self deformation of the fuel assembly can be measured in a mode of noncontact with the assembly by adopting an ultrasonic method.
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Description

technical field

[0001] The invention belongs to the fields of shape deformation analysis and ultrasonic distance measurement of nuclear power plant fuel assemblies, and in particular relates to a fuel assembly deformation measurement device and method. Background technique

[0002] The fuel assembly works under the conditions of high temperature, high pressure, strong neutron radiation, corrosion, erosion and hydraulic vibration in the core. After the extrusion of the bundle, the whole rod bundle will be deformed in different degrees, and the deformation is manifested as the bending of the rod bundle components and the twisting of the components. The bending of the bundle assembly and the twisting of the assembly will prevent the fuel assembly from being properly loaded into the fuel grid during charging. If the relative position (offset and twist) of the upper and lower tube bases of the fuel assembly can be measured, the lower tube base can be inserted into the grid by us...

Claims

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