Development of a New 48-Inch UF6 Cylinder Overpack

The Kevil Kougar overpack is new generation Type H(U) packaging designed to transport ANSIN14.1 and ISO-7195 compliant 48-inch UF6 cylinders. The Kevil Kougar is designed specificallyto transport the thin-wall 48G cylinders, but will also accommodate other 48-inch cylinder types. The Kevil Kougar design provides thermal and impact protection for the cylinder under conditions required for a Type H(U) package capable of transporting UF6 via road, rail, and ocean. The packaging design is a smooth octagonal shape designed to carry one 48-inch UF6 cylinder. It consists of an upper subassembly and lower subassembly, which are fastened together with ten toggle bolts, five per side. Each subassembly consists of an outer and inner steel shell secured to a frame assembly, with wood and polyurethane foam filling the space between. The only protruding components are for ease of operation and consist of four lifting lugs and fork pockets on the upper body and the base and fork pockets on the lower body. The design incorporates interior rubber pads for cylinder cushioning, support, and alignment, steel stabilizing beams fore and aft to prevent cylinder movement, closure mechanisms, a tamper indicating device, and tie-down features. Currently, the Kevil Kougar is designed to transport contents of depleted uranium and natural uranium. Future activities include licensing the package as Type AF to facilitate transport of historic USA Department of Energy fissile material packages.