The HI-STAR 63 Cask is an all-metal type B(U) transport cask licensed to IAEA SSR-6 standards. It is designed to contain two stainless steel canisters each containing 60 B-37 CANDU fuel assemblies. The containment boundary is comprised of a fully cryogenic steel shell, bottom plate and closure lid. Layered stainless steel shells provide for additional package shielding. A full set of transport accident tests including a 9 m drop test, puncture test, and fire and deep submergence tests were successfully performed during the licensing process.