Patent Number: 043026800
Section: claims

1. A cover construction for a shielding container for the transportation and/or storage of radioactive fuel elements comprising: an outer transportation cover detachably, sealingly securable to an outer rim portion of the container;  an inner shielding cover comprising an inner cover portion having overlapping sealing engagement with an inner rim portion of the container and an outer cover portion movable inwardly and outwardly relative to said inner portion;  means defining a bayonet connection between said outer cover portion and the container; and  screw and stop means connecting said inner and outer cover portions whereby rotation of said screw means effects limited inward and outward relative movement between said outer and inner cover portions. 2. The cover construction defined in claim 1 including sealing means interposed between the peripheral portions of the inner and outer cover portions to effect a seal therebetween on relative movement of said portions toward each other.