HI-STAR 180 is a dual-purpose cask with the capability to store/transport high burn-up and MOx PWR fuel. This cask does not contain an MPC and uses two independent lids for double containment.
HI-STAR 180 is the first transport cask to use the METAMIC-HT fuel basket to achieve high heat rejection rates. The aggregate permissible heat rejection from the cask is in excess of 32.5 kW. HI-STAR 180 is the only cask in the industry that has been tested for leak tightness after a missile strike emulating a crashing aircraft.
The Metamic-HT basket is visible in the cut-away view.