| 摘要 |
Methods and apparatus for examining a nuclear reactor shroud are described. In one embodiment the inspection apparatus includes a drive system, a mast subassembly, and a scanner subassembly. The drive system includes at least two drive assemblies that engage the shroud top to move the inspection apparatus relative to the shroud. The mast subassembly is coupled to the drive system and includes a roller foot which engages the shroud bottom flange to prevent movement of the inspection apparatus during scanning of the shroud. The scanner subassembly is movably coupled to the mast subassembly and includes a horizontal frame, a scanner carriage having a turntable, a movable plate and a scanner. The scanner subassembly coupled to the mast subassembly provides the scanner with four degrees of motion. |
