Steam generator probe positioning device. Final report

This report presents a conceptual design for a positioning device used when inspecting the tubes in a PWR nuclear power plant steam generator. This device, for example, may be used in conjunction with an eddy current or profilometer inspection probe. The device is used to quickly and accurately, yet remotely, position an inspection probe beneath any tube. The design incorporates two new features. First, it can be set up and removed from the generator without requiring personnel entry into the highly radioactive portions of the generator. Second, it is controlled by a small remote minicomputer and can thereafter rapidly and accurately locate any tube in the steam generator. This design offers the advantages of reduced radiation exposure, shorter inspection time, greater versatility and speed, and less skill and training for the equipment operators