Central Valley, NY - The new, at left, and old emergency sirens for the Indian Point nuclear power plant. There are 150 emergency sirens designed to alert residents within 10 miles of the plant in Buchanan to tune to their local Emergency Alert System (EAS) radio or television station for important information. The old siren rotated when it sounded. The new siren has speakers pointed in four directions. Feb. 27, 2008.