Abstract
Eddy current testing (ECT) is used for the in-service inspection of tubes in steam generators of pressurized water reactor type nuclear plants. In order to increase the testing speed, arrayed multi-coil probes are proposed. Newly developed arrayed multi-coil probes are described in this paper. Because of the multi-coil arrangement, it is possible to detect the whole round of the tube without rotation. High detectability is achieved. The signals of this probe are predicted by the edge based finite element method, and comparing between experimental and numerical results show good agreement.
