Replacement of Large Torus Shield Sectors in ETF with Remote Techniques

摘要

Removal and replacement of the heavy torus shield sectors in ETF requires initial surface movement in the radial direction. Options for moving the sectors are wheels, roller dollies and air bearings. A hybrid system combining both wheels and air bearings was selected in order to provide precise control and to enable the device to be self-propelled. The device is palletized and deployed under the sector only during maintenance activities. 11 figures, 2 tables. (ERA citation 09:017820)