The Defect Inspection of Irradiated Fuel Rods using Differential Encircling Coil Probe

The defective fuels of nuclear reactors, which affect the safety of nuclear reactor operation, are inspected using ECT(Eddy Current Test). ECT, which inspects the defects in fuel rods through eddy current due to electromagnetic induction law, is an effective method acquiring defect shape, defect size in fuel rods and defect location. In this study, the eddy current test on the fuel rods, which are irradiated in Youngkwang 4 reactor, is performed, and the defect signals of fuel rods are acquired and the integrity of the fuel rods is evaluated, and the reliability of the eddy current test is confirmed by comparing the results of ECT with those of visual inspection. These PIE(Post Irradiation Examination) data are available for reactor operation and the design of nuclear fuels