06.03.2025
GNS introduces the world’s first canister-based DCI cask system - Cost-efficient and safe defueling for NPP with limited crane capacities
GNS, Germany based world market leader for spent nuclear fuel metal casks, introduces the latest packaging solution for transport and long-term interim storage tackling the challenges of limited crane capacities in dated NPP: The CASTOR geo69 combines the proven advantages of the CASTOR cask family, the most cost-efficient metal casks worldwide, with a patented reclosable canister system for up to 69 BWR or 37 PWR fuel assemblies.
The CASTOR geo69, as the first DCI cask for spent fuel from commercial reactors, has recently received its 10 CFR71 approval from the NRC and is expecting the 10 CFR72 approval shortly. It makes the robust and cost-efficient DCI cask technology applicable for many NPP systems worldwide for the first time.
Taking into account limited crane capacities inside the containment, the spent fuel is loaded into a stainless-steel canister inside the pool. The canister is then inserted into the DCI cask outside of the containment - just like into a conventional concrete packaging system, while avoiding any risk of stress corrosion cracking due to the robust DCI.