Ultrasonic inspection device for nuclear reactor pressure vessel bottom head girth weld
A technology for nuclear reactors and pressure vessels, applied in measuring devices, material analysis using sound waves/ultrasonic waves/infrasonic waves, instruments, etc., can solve problems such as welds that are prone to corrosion, serious safety accidents, and coolant leakage, and reduce radioactive rays Irradiation, effects of improving accuracy and reliability
Active Publication Date: 2016-01-27
RES INST OF NUCLEAR POWER OPERATION +1
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Problems solved by technology
The girth weld of the bottom head is one of the main objects of the non-destructive testing of the primary circuit system. Since defects such as air bubbles, cracks, and slag inclusions are prone to occur after metal welding, defective welds are prone to corrosion at the defect
The gradual expansion of corrosion will cause the leakage of radioactive coolant in the primary circuit, and serious safety accidents will occur. Therefore, non-destructive testing of this type of weld must be carried out regularly
Method used
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Embodiment Construction
[0013] A nuclear reactor pressure vessel bottom head girth weld ultrasonic inspection device according to the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0014] like figure 1 As shown, a nuclear power plant nuclear reactor pressure vessel bottom head girth weld ultrasonic inspection device according to the present invention includes a frame 10 connected by a rotating shaft 8, a swing gear 9 and a swing rod 7; the swing gear 9 and the swing The rod 7 is screwed, and the driving element 11 drives the swing gear 9 to swing, so that the swing rod 7 swings around the rotating shaft 8 .
[0015] like figure 1 and image 3 As shown, the linear guide rail 4 and the telescopic cylinder 6 are fixed above the swing rod 7, the slider 5 is arranged on the linear guide rail 4, the extension rod 3 is fixed on the slider 5, and one end of the extension rod 3 is connected with the telescopic cylinder 6 The other...
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The invention provides an ultrasonic detection device for a circumferential weld of a bottom head of a reactor pressure vessel. The device comprises a rack, an oscillating gear and an oscillating rod which are connected by a rotary shaft, wherein the oscillating gear and the oscillating rod are connected by a thread; a driving element drives the oscillating gear to oscillate so as to enable the oscillating rod to oscillate around the rotary shaft; a linear guide rail and a retractable air cylinder are fixedly arranged above the oscillating rod; a slide block is arranged on the linear guide rail and a stretching-out rod is fixedly arranged on the slide block; one end of the stretching-out rod is connected with the retractable air cylinder and the other end of the stretching-out rod is connected with a tray; the stretching-out rod is retracted under the effect of the retractable air cylinder so as to drive the tray to be stretched out and taken back. According to the device, the accuracy and the reliability of detection data can be improved and the irradiation to a human body by radioactive rays is reduced.
Description
technical field [0001] The invention belongs to the non-destructive testing application of the bottom head girth weld of the nuclear reactor pressure vessel of a nuclear power plant, and in particular relates to an ultrasonic inspection device for the bottom head girth weld of the nuclear reactor pressure vessel. Background technique [0002] Nuclear power plant pressure vessel is one of the core components of nuclear reactor coolant pressure boundary. The head girth weld refers to the connection weld between the shell section and the bottom head. The girth weld of the bottom head is one of the main objects of the non-destructive testing of the primary circuit system. Since the metal is prone to defects such as air bubbles, cracks, and slag inclusions after welding, defective welds are prone to corrosion at the defect. The gradual expansion of corrosion will cause the leakage of radioactive coolant in the primary circuit, which will cause serious safety accidents. Therefore...
Claims
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IPC IPC(8): G01N29/265
Inventor 杨光周文
Owner RES INST OF NUCLEAR POWER OPERATION