Warning sirens at the Peach Bottom Atomic Power Station sounded late Tuesday morning, but there was no emergency and no cause for alarm, according to York County spokesman Carl Lindquist.
The county's 911 Center and Office of Emergency Management received numerous phone calls from people reporting the sirens had sounded, he said.
Had there been an emergency at the nuclear plant, the sirens would have sounded for three minutes, alerting residents to check for Emergency Alert System messages on television or radio stations, Lindquist said.
The power plant has 97 sirens, but only a few of them sounded Tuesday, according to power plant spokeswoman Lacey Dean.
It appears the sirens that sounded were ones controlled by York County, and it appears they somehow were set off by the county, she said.
"Peach Bottom is working with its siren manufacturer to determine why the station's new emergency sirens inadvertently activated during transition testing and maintenance," Dean said. "The plant continues to operate as designed and no emergency condition exists."