Inspection device

摘要

An inspection device that is capable of inspecting all heat-transfer-tube sealing portions in a steam generator and that is also capable of analyzing a defect shape is provided. An inspection device that employs the eddy-current flaw detection method to inspect the presence/absence of a defect in a welded portion (103) between a tube (101) and a tube plate (102) is provided with a main unit (41) that has a circular-column portion (41A), which is inserted into the tube (101), and a flange portion (41B), which is pressed against the tube plate (102), and that is rotatable with respect to the welded portion (103); a probe (42) that is disposed inside the main unit (41), that can be moved close to and away from the welded portion (103), and that detects a defect in the welded portion (103); and a pressing portion (44) that presses the probe (42) toward the welded portion.

主权项

1. 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.