5320-3

MODEL 5320. THE BASIC ARRANGEMENT OF THE SHIPPING CASK IS AN UPRIGHT CYLINDER WITH A DOMED TOP. THE WEIGHT OF THE CASK IS APPROXIMATELY 148.5 KG (327 LB.), THE OVERALL HEIGHT IS 81.3 CM (32.0 IN.), AND THE DIAMETER IS 42.6 CM (16.75 IN.). THE CASK CAVITY HAS A LENGTH OF 44.5 CM (17.5 IN.) AND A DIAMETER OF 4.4 CM (1.73 IN.). THE NESTED PRIMARY AND SECONDARY CONTAINMENT VESSELS ARE SURROUNDED BY A FINNED ALUMINUM SHIELD TANK FILLED WITH WATER-FILLED POLYESTER (WEP). THE CONTAINERS ARE RETAINED WITHIN THE CENTRAL SLEEVE OF THE SHIELD TANK BY A BOLT WHICH HOLDS THE BOTTOM OF THE SECONDARY CONTAINER AGAINST THE BASEPLATE. HEAT FROM THE PACKAGE CONTENTS IS CONDUCTED TO THE OUTER SHELL OF THE SHIELD TANK BY RADIAL ALUMINUM PLATES THAT CONNECT THE CENTRAL SLEEVE TO THE OUTER SHELL. AXIAL FINS ON THE OUTER SHELL DISSIPATE THE HEAT TO THE ENVIRONMENT. AN EXPAN DED METAL SCREEN ENCLOSES AND PROTECTS THE FINS. THE SCREEN ALSO EXCLUDES PERSONNEL CONTACT DURING HANDLING OPERATIONS. THERMAL SHIELD PROTECTS THE LID, FLANGES, FLANGE BOLTS, AND SEALS OF THE SECONDARY CONTAINER DURING THERMAL ACCIDENT CONDITIONS. "TOP HAT" IMPACT LIMITER PROTECTS ALL OF THESE COMPONENTS DURING IMPACT ACCIDENTS. SECONDARY CONTAINMENT IS PROVIDED BY THE EP-62, WHICH IS A CYLINDRICAL PRESSURE VESSEL FABRICATED FROM TYPE 304 STAINLESS STEEL. PRIMARY CONTAINMENT IS PROVIDED BY THE EP-61, WHICH IS A TYPE 316 STAINLESS STEEL PRESSURE VESSEL WITH A THREADED PLUG AND CAP. *SEE CERT.