(Delta) -- Warning sirens around a midstate nuclear power plant are being replaced as part of an $11 million project.
Peach Bottom Atomic Power Station in southern York County is replacing its network of 97 warning devices that fill a 10-mile radius around the facility.
The new sirens will have batteries that should keep them working during power outages.
Plant owner Exelon Generation is testing the new devices periodically until they are finished with installation at the end of the year.
Spokeswoman Lacey Dean says the sirens sound very rarely.
"Peach Bottom has never used the sirens for emergency notification," Dean says. "They're actually used more often by Pennsylvania and Maryland emergency management authorities to notify residents of severe weather, including tornadoes, hurricanes and other similar conditions."
Dean says people who hear the sirens during an emergency should tune to a local radio or TV station for a special broadcast.
She says anyone with concerns about siren testing should contact their county emergency management office.
Three Mile Island nuclear power plant in Dauphin County upgraded its emergency sirens last year.
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