Nuclear waste storage. Technicians operating nuclear waste handling equipment at the vitrification plant at Sellafield in West Cumbria, UK. Here, high-level radioactive waste is turned into glass for storage in chambers under the black circular lids in the floor. This high-level radioactive waste comes from the Thermal Oxide Reprocessing Plant (THORP), also at Sellafield, which reprocesses spent oxide fuel from nuclear reactors worldwide.