초록 ▼

An overpack for a vessel for containing hazardous liquid comprising a circular lid seating on a hollow cylindrical body. The lid and body of each of outer welded shell construction is filled with a core of heat insulative filler such as rigid polyurethane foam. The upper edges of the inner and outer

An overpack for a vessel for containing hazardous liquid comprising a circular lid seating on a hollow cylindrical body. The lid and body of each of outer welded shell construction is filled with a core of heat insulative filler such as rigid polyurethane foam. The upper edges of the inner and outer cylindrical side walls of the body are each welded to a respective relatively heavy and substantially rigid ring which allows the side walls together with their associated bottom walls to be suspended accurately concentric with one another until the structure is rigidified by welding on of a cap connecting the rings together. This allows accurate reproduction of the required standard design for the overpack meeting the requirements for survival of drop, impact and fire tests with the structure remaining as a containment for the hazardous liquid.

대표청구항 ▼

A cylindrical overpack for protection of a vessel for holding radioactive or like hazardous materials during transport, comprising a circular lid having an upper and a lower circular wall, a cylindrical edge member welded at its upper and lower ends to the upper and lower walls, respectively, and he

A cylindrical overpack for protection of a vessel for holding radioactive or like hazardous materials during transport, comprising a circular lid having an upper and a lower circular wall, a cylindrical edge member welded at its upper and lower ends to the upper and lower walls, respectively, and heat insulative filler material disposed in the space therebetween, and a cylindrical hollow body on which the lid is secured, having concentric inner and outer cylindrical walls defining an annular space therebetween, with said outer wall of greater axial extent than said inner wall and an inner and an outer circular bottom wall welded to the lower edges of inner and outer cylindrical walls, respectively, and with said outer bottom wall offset downwardly from the inner bottom wall to define a lower space therebetween, outer and inner concentric substantially rigid ring members welded to an upper edge of the outer and of the inner cylindrical walls, respectively, and each of a rectangular cross section of axial and transverse dimension each greater than the wall thickness of the cylindrical wall to which it is welded, an annular cap member extending between and welded at its opposite edges to said outer and inner ring members, respectively, and heat insulative filler material disposed in said annular and lower spaces.