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Sirens to sound for three minutes at noon

LUSBY, MD  – Exelon Generation will conduct its semi-annual, full-volume test of the emergency warning sirens on Monday, Dec. 4, at approximately noon. This is the first of the recently implemented semi-annual siren tests. The testing frequency has changed from monthly for Dorchester County and quarterly for Calvert and St. Mary’s Counties to semi-annually, aligning with federally mandated testing requirements, after Exelon Generation completed a project to add battery back-up capability to all of the 73 sirens located within a 10-mile radius of the Calvert Cliffs Nuclear Power Plant.

If sounded during a non-testing period, the sirens are not a signal to evacuate, but a warning to tune to a local emergency alert broadcast television or radio station. Activation of the sirens is controlled by county emergency management.

Calvert Cliffs is located on the western shore of the Chesapeake Bay in Calvert County and is Maryland’s only nuclear energy facility.  The station is home to two pressurized water reactors capable of generating 1,768 megawatts combined. Units 1 and 2 began commercial operation in 1975 and 1977, respectively.

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