Inspection method and inspection device
AssigneeMitsubishi Heavy Industries, Ltd.
InventorsKazushige Namba, Tomonori Shichida, Naoto Kawase
Life of this patent
Estimating the term…
Abstract
There is provided an inspection device for inspecting an inner surface of a nozzle provided in a reactor vessel. The inspection device includes: a device frame, an inspection unit provided on the device frame, an inspection unit push-out moving mechanism for pushing out and moving the inspection unit to the inner surface of the nozzle, a rotation moving mechanism for rotating and moving the inspection unit, a calibration test unit arranged on the device frame for calibrating the inspection unit; and a calibration test unit forward/backward moving mechanism for moving the calibration test unit forward or backward in the direction along the central axis with regard to a track where the inspection unit makes push-out movement.
Claims6
An inspection method for inspecting a body, which is to be inspected, the body being provided in a nuclear power plant,
- the inspection method comprising:
- arranging an inspection device having an inspection unit and a calibration test unit at a reference position where the body which is to be inspected is inspected;
- subsequently moving the calibration test unit, while placing the inspection unit at the reference position, forward or backward with regard to a track where the inspection unit makes push-out movement to the inspection target portion of the body which is to be inspected, and calibrating the inspection unit after moving the calibration test unit forward or backward;
- subsequently moving the calibration test unit from the track while placing the inspection unit at the reference position;
- and
- subsequently causing the inspection unit to inspect the inspection target portion,
- wherein after moving the calibration test unit forward or backward while placing the inspection unit at the reference position, calibrating the inspection unit by making the inspection unit the push-out movement so as to contact the inspection unit with the calibration test unit, and by rotating the inspection unit contacted with the calibration test unit.
An inspection method for inspecting an inner surface of a nozzle provided in a reactor vessel,
- the inspection method comprising:
- inserting an inspection device including an inspection unit and a calibration test unit into inside of the nozzle;
- subsequently moving the calibration test unit, while placing the inspection unit at the reference position, forward or backward with regard to a track where the inspection unit makes push-out movement to the inner surface of the nozzle at a reference position where the inspection device is inserted into the inside of the nozzle, and calibrating the inspection unit after moving the calibration test unit forward or backward;
- subsequently moving the calibration test unit from the track while placing the inspection unit at the reference position;
- and
- subsequently causing the inspection unit to inspect the inner surface of the nozzle,
- wherein after moving the calibration test unit forward or backward while placing the inspection unit at the reference position, calibrating the inspection unit by making the inspection unit the push-out movement so as to contact the inspection unit with the calibration test unit, and by rotating the inspection unit contacted with the calibration test unit.
Dependencies are inferred from the claim text.