Technical Program for Long-Term Management of Canada’s Used Nuclear Fuel – Annual Report 2021

APM DGR Project Level DR The APM DGR Project DR document identifies the design basis of the APM DGR and the overarching project-level requirements for on-site surface and underground facilities (i.e., within the peripheral fence), the supporting off-site facilities (e.g., the excavated rock management area and the Center of Expertise), and the transportation program. [...] The primary UFPP functions include receipt and processing of transportation packages, handling of the used fuel bundles, repackaging of the used fuel into the UFC, assembly of the completed UFC into the bentonite Buffer Box (BB), and dispatch of the UFC and BB assembly for placement into the repository. [...] The equipment travels on rails into the emplacement room and places gap fill material in the space between the buffer boxes and the interior walls and ceiling of the mock emplacement room. [...] The impact toughness and the DBTT are important properties to determine the lowest service temperature of the UFC and the strength of the UFC against impact loads, such as in a drop event. [...] While the presence of compacted bentonite in the DGR virtually eliminates this possibility, the effects of bisulfide on the integrity of the UFC and the quantification of any such corrosion is important to understand.