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Study of ECT of nuclear power plant - FEM model and new probes development

Release time:2019-11-12
Funded by CGN Inspection Technology Co.,Ltd
Eddy current testing (ECT) techniques are widely used in in-service inspection of metal structures in nuclear power plants. A variety of ECT probes have been developed for the application.  We are cooperating with CGN Inspection Technology Co.,Ltd to numerically model the ECT probes and develop novel next generation probes.

中广核检测技术有限公司资助
涡流检测(ECT)技术广泛用于核电站金属结构的在役检查。针对该应用已经开发了多种ECT探头。我们现在与中广核技术检测公司合作,对ECT探头进行数值建模并开发新型的下一代探头。


FEM model of ECT for nuclear power plant inspection
核电站检测的有限元模型

Schematic of the prototype probe with array MR sensors
阵列磁阻传感器探头原型的示意图
Simulation results of 50% tube wall OD circumferential notch with width 1mm and different length. Lissajous Pattern seen of real and imaginary component along the circumferential direction at Z=0mm. 
宽度1mm,不同长度的50%深度管壁外径周向缺陷的仿真结果。在Z = 0mm处沿圆周方向观察实部和虚部的Lissajous图案
Experimental output images of RoC-GMR probe of OD axial notches. (a) –(c) in phase (real) component for depths 60%,80%, and 100% of tube wall;  (d) –(f) quadrature (imaginary) component for depths 60%,80%, and 100% of tube wall.  
RoC-GMR探头OD轴向切口的实验输出图像。 (a) –(c) 深度为60%,80%,和100%管壁厚度缺陷信号的相位分量(实部);(d) –(f) 深度为60%,80%,和100%管壁厚度缺陷信号的正交分量(虚部)。