A program was conducted to evaluate four candidate storage cask closure configurations. Four major areas were evaluated to provide a basis for selection of an acceptable closure(s). These were: (1) weldability, (2) suitability of available nondestructive examination methods for determining weld soundness, (3) closure configuration structural soundness, and (4) economics. A relative ranking of each closure configuration was made using the study results. The corner weld configuration was ranked as the most desirable, followed by the threaded plug and seal weld, the circumferential butt-weld and the multiplate in order of decreasing desirability. This report recommends that the structural analysis be continued on the first and second ranked closures to provide a quantitative evaluation capability of their structural integrity and that ultrasonic examination of the corner weld closure configuration be demonstrated. A remote demonstration of welding and nondestructive examination capability of the corner weld is also recommended.