Maintenance of High Duty Linac Cooling System for 30 Years at Laboratory of Nuclear Science, Tohoku University

Abstract

The cooling system for 300 MeV linac at LNS, Tohoku University has been continued for about 40 years to supply the intense electron beam for a lot of experiments. However the water leakage due to corrosion occurred frequently at welding parts and aluminum gaskets for the pipe joint. Accordingly the degradation of the performance of the system is serious. In this report I describe about the typical malfunction examples and evaluation of many items to be measured for re-construction of the cooling system that I have experienced for 30 years.