蒸汽发生器在制造、安装和运行过程中, 防振条与U形热交换管的相对位置可能由于二次侧水流或者外力等作用而改变, 而失去防振作用。运用涡流检测的手段, 可以获得防振条与U形管相对位置的信息。水压后防振条位置的检测, 可作为蒸发器运行过程中监测的基准, 对整个蒸发器的安全有效运行起着重要的作用。该方法解决了已完工的蒸汽发生器防振条与换热管相对位置如何测量的问题。

In the process of manufacture, installation and operation of steam generator, the relative position of the anti-vibration bar and the U-shaped heat exchange tubes may be changed due to secondary side effect such as water or outside force, thus possibly resulting to its failure. Using eddy current testing method, the information on the relative location of anti-vibration bar of U-tube can be obtained. The position detection of anti-vibration bar after the hydraulic test can be used as a benchmark during the steam generator operation, which may play an important role for the safe and effective operation of the evaporator. The application of this type of eddy current testing has solved the problem of how to measure the relative position of heat exchange tube and anti-vibration bar for the existing steam generators.