Induced Radioactivity & Remote Handling Methods for Accelerators

The improvement of accelerators for greater beam intensity brings on problems of high induced radioactivity in parts and hardware associated with these machines. Data showing the magnitude of induced activity at several existing installations are tabulated to forecast the ultimate levels. Magnitudes of several hundred R/hr. are predicted, thus showing the need for a logical approach to the problem in new machine design parameters and in remote handling. The proposed modifications of present accelerators are presented showing the different approaches taken and the philosophy upon which their criteria are based. Design in some cases is based upon the ultimate activity levels expected, while others plan to make improvements as the activity grows. Regardless of the approach, definite design features are mandatory to make them compatible to remote handling. These features take into account the inaccessibility to the activated equipment and the need for rapid assembly and disassembly. Modular design of apparatus with quick disconnect means for both the mechanical and electrical coupling is presented to fulfill the above needs. A review is made of the existing remote handling equipment and systems showing their shortcomings or possible application to accelerator work. This is supplemented with an explanation of what features must be present in remote handling systems to make them usable for accelerator use. Manipulators and remote handling devices used in hot cells are designed for operation within the confines of limited and selected space.