NRC CAL – NOV (White)

On September 19, 2013, the NRC issued a Notice of Violation (NOV) to Carolina Power and Light for a violation of 10 CFR 50.63(c)(2), Loss of all Alternating Current Power, Implementation – Alternating AC Source, associated with a White Significance Determination Process finding involving the failure of Robinson to have an alternate AC power source with acceptable capability to withstand station blackout for the required durations specified in its coping analysis. Specifically, during surveillance testing of the Dedicated Shutdown Diesel Generator (DSDG) on October 2, 2012, the DSDG automatically shut down on high engine temperature due to a failure of the radiator drive belts. Based on the failure of the DSDG and necessary repair time, this degraded condition would have prohibited the DSDG from supplying power to shutdown equipment within one hour following a station blackout and could have rendered the plant unable to cope for eight hours after a postulated station blackout or to provide emergency power for certain selected Fire Safe Shutdown scenarios.