Optimization of SLAR Tool Bearings

Abstract

The SLAR bending tool is used inside the pressure tube and applies a five point bending load to deflect the pressure tube upwards. This deflection unpinches the pressure tube to calandria tube spacer and allows it to be repositioned by the SLAR tool. The two bearings at either end of the bending tool are subjected to reaction forces during loading and also support the tool during all axial movements within the pressure tube. An extensive analytical and test program was completed to determine a bearing design which minimizes the pressure tube stresses at the bearing location and whose material would result in no damage to the inside surface of the tube.