"A loaded NUPAC 125B Fuel Shipping Cask readied for transport at Three Mile Island (TMI)."
January 1986

DOE description:
"Fuel and structural core materials from Three Mile Island - 2 reactor are being shipped by rail from TMI to the Department of Energy's Idaho National Engineering Laboratory for research and eventual disposal. The NUPAC 125B Rail Casks were designed for the waste shipments. The casks are 280 inches long by 120 inches in diameter and will weigh approximately 90 tons when fully loaded. Each cask provides two separate vessles for containment. The stainless steel inner vessel includes a hub and spoke arrangement to support tubes which hold loaded fuel canisters. The outer vessel has a composite wall - three layers of metal. Each cask will hold seven cannisters containing fuel and core materials."
 
"Rail shipment was selected as the means for transporting the TMI-2 waste because it is safe, economical, and it will greatly reduce the number of shipments as compared to truck transport. Shipping by rail can accomplish the task with 35 - 40 shipments, whereas shipping by truck would require approximately 250 shipments."

Image 287-007-002
US Department of Energy
Energy Technology Visuals Collection
copyright, US Department of Energy