NRC CAL – NOV (Red)

On April 10, 2012, the NRC issued a Red Significance Determination Process finding and a Notice of Violations for three violations to Omaha Public Power District as a result of inspections at the Fort Calhoun Station. The Red finding was based on deficient modification and maintenance of the safety-related 480 Vac electrical distribution system that resulted in a catastrophic switchgear fire. There were three violations associated with the Red finding: (1) 10 CFR Part 50, Appendix B, Criterion III, “Design Control” associated with modifications to safety-related breakers, (2) 10 CFR Part 50, Appendix B, Criterion XVI, “Corrective Action” associated with inadequate electrical maintenance, and (3) License Condition 3.D, “Fire Protection Program” associated with train separation. At the time of the event the plant was in cold shutdown for a planned refueling outage.