Per the requirements of the Task Order 18: Generic Design for Small Standardized Transportation, Aging, and Disposal Canister Systems, Statement of Work (SOW), EnergySolutions and its team partners: NAC International, Exelon Nuclear Partners, Talisman International, and Petersen Incorporated, hereafter referred to as “the Team”, is providing the U.S. Department of Energy (DOE) a Final Report, which documents a generic design of a small capacity Standardized Transportation, Aging and Disposal (STAD) canister system for four Pressurized Water Reactor (4-PWR) Spent Nuclear Fuel (SNF) assemblies or nine Boiling Water Reactor (9-BWR) SNF assemblies. 
The Team has developed an integrated transfer, storage and loading process for the small STAD canisters, which utilizes a first of-a-kind carrier to allow four small STAD canisters to be loaded, welded, dried and handled in parallel from the spent fuel pool through to storage or transportation. Figure ES-1 provides an overview of the system components. The STAD canisters have been developed in accordance with the DOE Performance Specification for Small and Medium Transportation, Aging and Disposal Canister Systems, FCRD-NFST-2014-000579. The proposed STAD designs which can be handled with the 125 ton pool crane found at most nuclear power station sites can accommodate the entire US spent PWR and BWR fuel inventory, with the exception of South Texas Project fuel and Combustion Engineering (CE) 16×16 fuel with control components (whose length exceeds that of the cask cavity). Some future assembly types, including AP1000 fuel, will also be too long for the proposed cask and basket design. Longer versions of the proposed STAD designs, which can be used with a 150 ton plant crane, could be designed; with the South Texas Project site, as well as the AP1000 plant design, having 150 ton pool cranes.

The proposed system will require a plant spent fuel pool crane capacity of 125 tons. Most US nuclear plant sites have a crane capacity of 125 tons or more. Some sites, however, have crane capacities between 100 and 125 tons. Plants with 100 ton crane capacities may be accommodated by designing transfer casks with less shielding, or by placing three (vs. four) STAD canisters inside the transfer and storage casks (should shielding analyses show that acceptable exterior dose rates cannot be obtained with a transfer cask with a loaded hook weight under 100 tons). Noting that loading three STAD canisters will require the use of a different carrier design, in order to avoid balance problems.