Brownville, Neb. - A problem with the Alert and Notification System in the vicinity of Cooper Nuclear Station caused several of the system sirens to sound at approximately 8:16 a.m. Tuesday morning.
According to Nebraska Public Power District officials, this was a false system activation that set off several sirens near the plant. There was no problem at the plant that would have required activation of the sirens, and at no time was there a threat to residents of the area around Cooper.
The cause of the false activation is under investigation.