"The number of Japanese nuclear reactors likely to restart in the next few years has halved, hit by legal challenges and worries about meeting tougher safety standards imposed in the wake of the Fukushima disaster, a Reuters analysis shows."

"Recently released testing results in western Pennsylvania, upstream from Pittsburgh, reveal evidence of radioactive contamination in water flowing from an abandoned mine. Experts say that the radioactive materials may have come from illegal dumping of shale fracking wastewater."

"Japan warned on Saturday that a volcano 50 km (31 miles) from a just-restarted nuclear reactor is showing signs of increased activity, and said nearby residents should prepare to evacuate."

"A power plant operator in southern Japan restarted a nuclear reactor on Tuesday, the first to begin operating under new safety requirements following the Fukushima disaster."

"A dirt trail shaded by ponderosa pines drops down the slope of this small canyon below the Los Alamos Nature Center and a recreation center. The canyon became a dumping ground during the Manhattan Project. Old pipes, washing machines, culverts and other debris from the era were tossed into the canyon by nearby homeowners and Los Alamos National Laboratory staff."

"VIENNA — Iran and a group of six nations led by the United States have agreed to a historic accord to significantly limit Tehran’s nuclear ability for more than a decade in return for lifting international oil and financial sanctions against Iran, a senior Western diplomat involved in the negotiations said on Tuesday."

"A weakness has been discovered in a French nuclear reactor of the type set to be built at Hinkley in the UK."

"Germany's oldest remaining nuclear reactor has been shut down, part of a move initiated four years ago to switch off all its nuclear plants by the end of 2022."