Recently released reports indicate there have been persistent problems with “conduct of operations” — not doing things like they should be done — at the Y-12 nuclear weapons plant.http://knoxblogs.com/atomiccity/2015/06/01/problems-with-conduct-of-operations-at-y-12/
The incidents, as revealed in reports by staff of the Defense Nuclear Facilities Safety Board, have occurred in Y-12’s key production facilities where highly enriched uranium and other materials — including lithium compounds — are processed, machined or assembled for use in nuclear weapons parts.
Oh, it just a little CRITICALITY, nothing to worry about, you'll be right
— In late March, production employees at Y-12 identified a “noncompliance” with nuclear criticality safety requirements in an area of 9212, the plant’s hub for processing bomb-grade uranium. The safety rules are in place to help prevent a so-called criticality accident, in which fissionable material — such as enriched uranium — is placed in conditions that enable an uncontrolled, self-sustaining nuclear chain reaction and release of dangerous levels of radiation.from their website