FLAW DETECTING DEVICE OF NUCLEAR REACTOR PRESSURE VESSEL NOZZLE PART

摘要

PURPOSE: To provide a flaw detecting deice for reactor pressure vessel nozzle in which a flaw detection can be smoothly performed in a radius part. CONSTITUTION: This device has a probe 6 loaded on a truck 1 traveling along the peripheral part of the nozzle 41 of a pressure vessel to perform a flaw detection in a nozzle inner surface curved part 49 by this probe 6. The truck 1 has a rotating part 5 having a rotating shaft 4 right-angled to the shaft of the nozzle 41, the probe 6 is mounted on the rotating part 5, and the outer surface curved part of the probe 6 is moved in close contact with the nozzle outer surface curved part 44.