The San Onofre nuclear power plant in Southern California reported to the NRC this morning that yesterday’s shutdown of its two reactors was the result of a “grid disturbance” due to a blackout caused by a transmission line failure in Arizona. However, even though power has been restored, the two reactors at San Onofre remain shut down this morning, according to both the NRC Event Report and the agency’s current Reactor Status Report.
The Event Report gives no indication that restart activities are underway or even planned. The report says that offsite power has been restored. This leads me to wonder if there was some additional problem at San Onofre which has kept the reactors shut down.