蒸汽发生器传热管防振条位置涡流定位检验精度研究

Research on Eddy Current Test Precision for the Position of Anti-Vibration Bars on Steam Generator Tubes

蒸汽发生器传热管防振条的位置偏移会对蒸汽发生器的安全稳定运行带来隐患。利用涡流法测量防振条的位置,分析影响涡流检验精度的因素。分析结果表明:采集速度和导管长度对检验结果影响较小,导管状态及传热管曲率半径对检验结果的可靠性和稳定性影响较大。

The position offset of the anti-vibration bar on steam generation tubes is a potential safety hazard for SG operation. In this paper, eddy current test is conducted to inspect the anti-vibration bar position. Meanwhile, the factors of the test precision were also studied. The result shows that, acquisition speed and the guide tube length have less effect on the test results. The guide tube status and the curvature radius of tube have great effects on the reliability and the stability of the test result.