Equipment and materials used in uranium casting operations at the Y-12 National Security Complex fell several feet from a furnace in Building 9212 last month after someone accidentally bumped a control lever, a federal safety board said in a recently released report.

The lever controls the movement of what is known as the stack assembly, which includes a crucible, mold, and uranium “charge.”

The loaded stack assembly had recently been cast, and it fell several feet from the body of an induction furnace to the base of the furnace, where loading and unloading occur, the Defense Nuclear Facilities Safety Board said in a report for the week ending April 19. [Read more…]