Fluid dynamics analysis of the discharge of cold helium into the storage vessel following a fast discharge of the JT-60SA superconducting coils

The cold gaseous helium, exhausted from the superconducting toroidal field coils of JT60-SA following a fast discharge will be released through a quench line into a 250 m3 storage vessel. An analysis has been performed to compute the transient mass flow, the temperature and pressure along the quench line and in the helium gas storage vessel in order to assess if the vessel, made from carbon steel, is always above its allowed minimum temperature.