Tucson Electric Power, Arizona Public Service and Salt River Project jointly announced a proposal Wednesday that could have a ...

Japan's nuclear plants faced global scrutiny after the devastating 2011 tsunami triggered by a 9.0 magnitude earthquake.

Arizona's three largest electric utilities will jointly explore expanded nuclear-power options. A new plant here could be ...

Armed with measuring devices, groups of citizens are embracing science to monitor radioactive fallout — and regain control of ...