Closure ring to retain a lid in contact with a metal drum in central C-section conforming to the contact area between a lid and the rim of a drum and further having a radially inwardly directed flange and a vertically downwardly directed flange attached to the opposite ends of the C-section. The additional flanges reinforce the top of the drum by reducing deformation when the drum is dropped and maintain the lid in contact with the drum. The invention is particularly valuable in transportation and storage of fissile material.
DISCLOSURE OF GOVERNMENT RIGHTS
This invention was made with Government support under Contract No. DE-AC09-96-SR18500 awarded by the United States Department of Energy. The Government has certain rights in the invention.