If you live within a 10-mile radius of Peach Bottom Power Station and hear sirens, don't be alarmed.

Exelon Generation, the nuclear plant's parent company, on Monday announced it has begun testing recently-installed emergency warning sirens. Tests will be conducted throughout the next three months.

Siren testing will last between 30 and 60 seconds and could occur several times in a row, according to a news release. The sound will be similar to that of current emergency sirens.

County emergency management officials are assisting with the testing. If local residents have questions during the testing, they can contact York County officials at 800-427-8347.

The testing is part of an $11 million investment by Exelon to replace 400 sirens, including 97 at Peach Bottom in Delta.

The work began in May and is expected to be completed by the end of this year.

Peach Bottom has never used the sirens for emergency notification, but Pennsylvania and Maryland emergency management authorities often use the system to notify residents of severe weather.

During the replacement period, the new and old sirens will operate simultaneously. Once the replacement project is complete, the old sirens will be removed.