"President Barack Obama and presidents, prime ministers and other top officials from 47 countries start work Monday on a battle plan to keep nuclear weapons out of terrorist hands."

"Sixteen utilities and a trade association sued the Energy Department on Monday to halt the government’s collection of nuclear waste disposal fees, arguing that the country no longer had a disposal plan after ruling out Yucca Mountain, Nev., as a repository."

"In a major victory for environmental advocates, New York State has ruled that outmoded cooling technology at the Indian Point nuclear power plant kills so many Hudson River fish, and consumes and contaminates so much water, that it violates the federal Clean Water Act."

"Test results have confirmed the presence of another, more dangerous, radioactive substance in the soil at Vermont's only nuclear power plant, officials said Tuesday, five days after announcing they had found and stopped tritium leaks at Vermont Yankee."

"The United States and Vietnam signed an agreement Tuesday that may pave the way for U.S. firms to help build nuclear plants in the Southeast Asian country as it strives to meet booming energy demand."

"The source of radioactive tritium in monitoring wells at Oconee Nuclear Station remains a mystery, and area residents are waiting for answers while workers are digging new test wells to narrow down the possibilities."

"The lack of a permanent home for the nation's radioactive waste is dampening prospects for a resurgence of the U.S. nuclear industry, federal commissioners said at their first public hearing on the subject."

"The U.S. Energy Department's push to scrap a long-planned national nuclear waste dump in Nevada has run into stiff opposition as lawmakers on Wednesday questioned the Obama administration's decision."

"MOSCOW -- When the Soviet Union introduced its Alfa class submarine -- at the time, the world’s fastest -- the subs were the bane of American sailors. Now, the reactors that powered those submarines are being marketed as the next innovation in green power."