Design of a 8-kW refrigeration system for ITER common test

Abstract Japan Atomic Energy Research Institute is working on the detail design of the helium refrigerator system (8 kW) in order to cool down Central Solenoid Model Coils (CS Model Coils), which will be fabricated and tested in International Thermonuclear Experimental Reactor (ITER) R&D project. The helium refrigerator system consists of supercritical helium cryogenic pump unit, helium refrigerator/liquefier unit, etc. The refrigerator system is designed, considering the various coil operation modes, refrigeration efficiency, economy, and research and development of the cryogenic components required for the ITER.