An ultrasonic weld seam scanning device for a control rod drive mechanism in a nuclear power station
A driving mechanism and control rod technology, which is applied in the field of nuclear power, can solve the problems of high radiation dose and high radiation intensity at the welding seam position, and achieve the effects of reducing radiation dose, small size, and convenient disassembly and assembly
Inactive Publication Date: 2019-01-01
LINGDONG NUCLEAR POWER +4
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Problems solved by technology
In addition, since the welding seam is located above the top cover of the reactor pressure vessel, it is a high-irradiation area, and the radiation intensity of the welding seam during service is high, and the radiation dose suffered by personnel is relatively high
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[0029] In order to make the purpose, technical solution and technical effect of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods. It should be understood that the specific implementations described in this specification are only for explaining the present invention, not for limiting the present invention.
[0030] Please refer to Figure 1 to Figure 4 As shown, the present invention provides a nuclear power plant control rod drive mechanism welding seam ultrasonic scanning equipment, which includes:
[0031] The clamping module 10 is detachably installed around the control rod drive mechanism (not shown);
[0032] The driving module 20 includes a scanning rotating disk 200 and a driving motor 202 fixedly installed on the scanning rotating disk 200. The driving motor 202 drives the scanning rotating disk 200 and the driving motor 202 fixedly installed...
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An ultrasonic weld seam scanning device for a control rod drive mechanism in a nuclear power station is disclosed. The device includes a clamping module detachably mounted around the control rod drivemechanism (CRDM); a drive module including a scanning rotary disc and a drive motor fixedly mounted to the scanning rotary disc, with the scanning rotary disc being driven by the drive motor and thedrive motor mounted on the scanning rotary disc rotating relative to the control rod drive mechanism; and a probe scanning module mounted on the drive module and clamping an ultrasonic probe. The ultrasonic probe abuts against a cylindric surface of a reactor pressure vessel top cover connection pipe base below the weld seam and connected to the control rod drive mechanism, and can perform ultrasonic scanning on weld seams. The device is small in size, light in weight, convenient to dismount and mount and automatic to operate, can achieve automatic ultrasonic scanning on weld seams of the CRDM, and can effectively reduce the radiation dosage of an operator.
Description
technical field [0001] The invention belongs to the technical field of nuclear power, and more specifically, the invention relates to an ultrasonic scanning equipment for welding seam of a control rod driving mechanism of a nuclear power plant. Background technique [0002] Nuclear power plant control rod drive mechanism (referred to as CRDM) is an important action part of the nuclear reactor. Through its action, the position of the reactor control rod assembly in the reactor vessel can be adjusted, and the reactor can be started, power adjusted, shut down and emergency shut down. [0003] In nuclear power plants, the CRDM is usually located above the reactor, and its pressure shell and the reactor pressure vessel top cover are connected and carried by threads. The pressure shell and the socket shell are welded and sealed. The cover socket is the pressure boundary of the reactor pressure vessel. [0004] In the related art, the thickness of the above-mentioned sealing weld ...
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IPC IPC(8): G01N29/04G01N29/265
CPCG01N29/04G01N29/265G01N2291/2675
Inventor 杜文浩惠维山张建平钟华李予卫徐显腾朱德才穆晓忠陈航邱振生靳孝义于宁杨伟光
Owner LINGDONG NUCLEAR POWER