Hotspot temperature calculation and quench analysis on ITER busbar

• The hotspot temperature is calculated in the case of different extra copper in this paper.
• The MQE (minimum quench energy) is carried out as the external heating to trigger a quench in busbar.
• The temperature changes after quench is analyzed by Gandalf code in the case of different extra copper and no helium.
• The normal length is carried out in the case of different extra copper by Gandalf code.

This paper describes the analysis of ITER feeder busbar, the hotspot temperature of busbar is calculated by classical method in the case of 0%, 50%, 75% and 100% extra copper (copper strands). The quench behavior of busbar is simulated by 1-D Gandalf code, and the MQE (minimum quench energy) is estimated in classical method as initial external heat in Gandalf input file. The temperature and the normal length of conductor are analyzed in the case of 0%, 50% and 100% extra copper and no helium. By hotspot temperature, conductor temperature and normal length are contrasted in different extra copper cases, it is shown that the extra copper play an important role in quench protecting.