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March 10, 2004

* South Carolina - U in incinerator ash exceeded criticality control limits (Westinghouse-Columbia)

March 8, 2004

* Westinghouse-Columbia SC - uranium concentration in incinerator offgas system higher than expected

August 4, 2003

Lightning damage looked for, but missed

BWX-Lynchburg took steps to protect their criticality monitors during lightning storm, and checked them after the weather cleared. Six of them were damaged in such a way that they appeared to operate normally, but the alarm function did not work. NRC Information Notice 2003-10 was issued to describe some details -- read it here.

April 24, 2003 - While replacing media in a seal trap, Paducah worker failed to follow both of the criticality control safety steps adopted to provide "double contingency" assurance. See Paducah's event report