Ballot initiative could shut down Phoenix-area nuclear plant By FAITH MILLER, Cronkite News PHOENIX (AP) — About 50 miles west of downtown Phoenix, three massive concrete domes, spaced side-by-side on a 4,000-acre plot of land, dominate the skyline. The Palo Verde Nuclear Generating Station is the nation’s largest power producer, serving 4 million people across the Southwest and providing about 35 …