Abstract: A sealable container for receiving toxic waste for long-term storage is described, the container comprising sheet metal members welded together to form a main fillable volume; four hollow, sheet metal, vertically directed leg portions situated at corner positions on the container, and, a separate lid member fixable to the container to seal at least the main fillable volume wherein the majority of the weld length utilized in the container construction is constituted by fillet welds. Further constructions are described having means to prevent flotation of waste in a liquid grout prior to solidification thereof and constructions where the leg volumes are independently fillable of the main volume.

Abstract: A transport and storage flask for radioactive material comprising a hollow body having lifting trunnions and external neutron shielding about the body except in the regions of the trunnions. To compensate for lack of shielding at the trunnions, blind bores in the body containing further neutron shielding material extend beneath the trunnions.