A full-volume test of the Indian Point Energy Center siren system will be conducted between 10 and 11 a.m. Wednesday throughout the 10-mile Emergency Planning Zone surrounding the nuclear-powered facility in Buchanan.

Sirens will sound simultaneously for four minutes, said officials in Orange County, where the test will also be conducted. The sirens will sound at full-volume for the entire duration of the test.

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No action on the part of the public is necessary or required for the drill.

If the sirens were sounded during an actual emergency, residents would listen to an Emergency Alert System (EAS) or tune in to a radio or television station for information and instructions about any action to be taken, officials said. Sounding the sirens is not a signal to evacuate.

"We test the Indian Point sirens in Orange County throughout the year to ensure that they work in the event of an emergency," Orange County Commissioner of Emergency Services Walter Leary said on Friday.

Indian Point supplies 25 percent of the electricity used in Westchester and New York City.