North Anna Power Station

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North Anna Power Station
North Anna siren 56.jpg

Siren #56, in Louisa County

Type Nuclear
Location Louisa County, Virginia area
Date installed Original system: 1981-1982
Current system: 2006-2007
Status Active
Testing dates 3nd Wednesday of February, May, August, and November
Testing times Around 11:10-11:15 AM
A sign near the entrance to Lake Anna State Park, with information about the plant and its system.

The Early Warning Siren System for the North Anna Power Station is comprised of 68 Whelen WPS-2806 and WPS-2906 sirens, located throughout Caroline, Hanover, Louisa, Orange and Spotsylvania counties. The sirens replaced a previous system, possibly of Sentry sirens, over a transitional period from 2006 to 2007.

The system is tested on the third Wednesday of February, May, August, and November at or around 11:10 AM, in 3 minutes of alert. The system uses a sequence of three activation signals, resulting in a distinct "triple windup" sound.

Most sirens use 560 Hz ESC-2020 controllers; however, a few use 435 or 465 Hz tones.

See also

External links