"They thought they'd managed this problem a few years ago. But Washington state Gov. Jay Inslee got a disturbing call Friday from Energy Secretary Steven Chu: Nuclear waste is leaking out of a tank in one of the most contaminated nuclear waste sites in the U.S."

"Donna Busche, a nuclear engineer and health physicist, files a suit alleging that executives tried to dissuade her from raising warnings about serious problems with the waste site's design."

"President Obama on Tuesday called North Korea's third successful nuclear test a 'highly provocative act' that 'undermines regional stability' and threatens action by the international community."

"Officials are alarmed at the lack of awareness about the invisible gas that invades homes."

"A nuclear accident similar to the one at Japan's Fukushima reactor would cost France about 430 billion euros ($580 billion), or 20 percent of its economic output, French nuclear safety institute IRSN said in a study on the possible financial impact of a nuclear crisis."

"Ever since last summer, when a 82-year-old nun broke into the Y-12 nuclear weapons complex in Oak Ridge, Tennessee, the National Nuclear Security Administration has scrambled to improve its leadership and beef up security at America's nuke facilities."

"Southern California Edison and the maker of steam generators at San Onofre nuclear plant knew about problems with the generators even before they were installed, Boxer and a congressman assert."

"Duke Energy Corp, the biggest power company in the United States, said Tuesday its Progress Energy Florida utility will retire the Crystal River nuclear plant in Florida."

"A report by two energy-consulting firms says the US government has not protected US taxpayers well enough against the risks of federal loan guarantees to a new nuclear power project."

"The toxic legacy of the Cold War lives on in Russia's Arctic, where the Soviet military dumped many tonnes of radioactive hardware at sea."

"CHATHAM, Va. -- In a landscape of rolling pastures and grazing cattle, Stewart East stepped from his pickup truck with a Geiger counter. He pointed it at a puddle filled by recent rains, and the instrument erupted in scratchy feedback."

"The chief of the U.S. Nuclear Regulatory Commission made her first visit Monday to the troubled San Onofre nuclear plant, offering assurance that the facility will remain closed until its safety is certain but giving few hints about its ultimate fate."

"The California Public Utilities Commission held an initial meeting Tuesday in an investigative process that could eventually result in ratepayers getting a refund for a portion of the bills they have paid during the San Onofre nuclear plant's year-long outage."

"A federal appeals court has ruled that the Nuclear Regulatory Commission must either allow more public participation in its decisions about fire safety at the Indian Point 3 nuclear reactor or to show why such input is impractical or inappropriate."

"NARAHA, Japan -- The decontamination crews at a deserted elementary school here are at the forefront of what Japan says is the most ambitious radiological cleanup the world has seen, one that promised to draw on cutting-edge technology from across the globe."