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Probe for ultrasonic inspection of pressurized water reactor fuel assembly and manufacturing process thereof

A fuel assembly, ultrasonic inspection technology, applied in the fields of reactors, nuclear engineering, nuclear reactor monitoring, etc., can solve the problems of strong reflective fission product leakage, cladding damage, cladding creep and other problems

Active Publication Date: 2016-07-27
CHINA NUCLEAR POWER OPERATION TECH +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

During the operation of the reactor, due to the long-term high-temperature and high-irradiation conditions of the fuel rods, the radiation swelling of the fuel pellets may cause cladding creep and cause cladding damage, resulting in leakage of highly reflective fission products

Method used

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  • Probe for ultrasonic inspection of pressurized water reactor fuel assembly and manufacturing process thereof
  • Probe for ultrasonic inspection of pressurized water reactor fuel assembly and manufacturing process thereof
  • Probe for ultrasonic inspection of pressurized water reactor fuel assembly and manufacturing process thereof

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Embodiment Construction

[0020] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like figure 2 , image 3 As shown, the probe for ultrasonic inspection of pressurized water reactor fuel assemblies according to the present invention includes a probe bracket 1 and an ultrasonic probe unit 2; the probe bracket 1 includes a substrate 4, a lead groove 5, a socket mount 6 and a probe mounting hole 7, The substrate 4 is provided with a lead slot 5 and a probe mounting hole 7, and the substrate 4 is connected with the socket mounting seat 6 by screws; the probe bracket 1 can simultaneously install two ultrasonic probe units 2. The ultrasonic probe unit 2 is installed in the probe installation hole 7, and the lead cable of the ultrasonic probe unit 2 is connected to the socket mounting seat 6 through the lead slot 5, and then connected to the ultrasonic instrument through an external cable.

[0022] The ultrasonic probe un...

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Abstract

The invention belongs to the technical field of nuclear power station before-service and in-service inspection, and in particular, relates to a probe for ultrasonic inspection of a pressurized water reactor fuel assembly and a manufacturing process thereof. The probe comprises a probe bracket and ultrasonic probe monomers; the probe bracket comprises a base plate, wire leading grooves, a socket mounting seat and probe mounting holes, the base plate is provided with the wire leading grooves and the probe mounting holes, and is connected with the socket mounting seat through screws; the probe bracket can be provided with two ultrasonic probe monomers simultaneously; the ultrasonic probe monomers are mounted in the probe mounting holes, and outgoing cables of the ultrasonic probe monomers are connected with the socket mounting seat through the wire leading grooves; the ultrasonic probe monomers comprise two ultrasonic probe monomer units arranged at intervals, and each ultrasonic probe monomer unit comprises a probe wafer, a sound insulation material, a backing filler and a back reflection inhibition layer from front to back sequentially; wires are arranged on and below the wafer. The height size of the probe produced by the process can be controlled to be within 1.2 mm, and the probe can be guaranteed to be safely close to a fuel rod.

Description

technical field [0001] The invention belongs to the technical field of pre-service and in-service inspection and other non-destructive testing of nuclear power plants, and particularly relates to a probe used for ultrasonic inspection of pressurized water reactor fuel assemblies and a manufacturing process thereof. Background technique [0002] The PWR fuel assembly is composed of fuel rods and a skeleton. The fuel rods are supported and clamped in the skeleton in a regular arrangement. Among them, the role of the fuel rod cladding is to ensure the mechanical strength of the fuel rod, and at the same time contain the nuclear fuel and its fission products, forming the first barrier between the strongly reflective fission products and the external environment. During the operation of the reactor, due to the long-term high temperature and high irradiation conditions of the fuel rods, the irradiation swelling of the fuel pellets may cause cladding creep and lead to cladding dama...

Claims

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Application Information

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IPC IPC(8): G21C17/00
CPCY02E30/30
Inventor 蔡家藩丁冬平周礼峰
Owner CHINA NUCLEAR POWER OPERATION TECH
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