Patent ID: 8779762

Claim:
An inspection device that employs an eddy-current flaw detection method to perform inspection for a presence or an absence of a defect in a welded portion between a tube and a tube plate, the inspection device comprising: a main unit that has a circular-column portion, which is inserted into the tube, and a flange portion, which is connected to the circular-clumn portion and which is pressed against the tube plate, and that is rotatable with respect to the welded portion; a probe that is disposed at a connecting portion between the circular-column portion and the flange portion inside the main unit, that can be moved close to and away from the welded portion, and that detects a defect in the welded portion; a pressing portion that presses the probe toward the welded portion; and an aligning portion that is provided at a distal end of the circular-column portion, that comes in contact with an inner circumferential surface of the tube, and that aligns a center of the main unit and a center of the tube.