"Levels of radioactive materials have risen sharply again in seawater near the troubled Fukushima Daiichi nuclear plant in northern Japan, raising the possibility of new leaks at the complex, the government said Saturday."

"The operator of Japan’s tsunami-damaged nuclear plant said Friday it would pay an initial $12,000 for each household forced to evacuate because of leaking radiation — a handout some of the displaced slammed as too little."

"The Davis Besse incident has resurfaced in the wake of the ongoing nuclear crisis at Japan's Fukushima Daiichi plant. Stories recounting close ties between Japanese nuclear regulators and utilities there have reinvigorated critics who say the NRC has not been an aggressive enough U.S. watchdog."

"The Philadelphia Water Department announced yesterday that it is enhancing its testing procedures and reviewing treatment technology after federal environmental officials found radioactive iodine in the city's drinking water."

"Japanese officials struggled through the day on Tuesday to explain why it had taken them a month to disclose large-scale releases of radioactive material in mid-March at a crippled nuclear power plant, as the government and an electric utility disagreed on the extent of continuing problems there."

"Japan has raised its assessment of the accident at the crippled Fukushima Daiichi nuclear power plant to the worst rating on an international scale, putting the disaster on par with the 1986 Chernobyl explosion, the Japanese nuclear regulatory agency said on Tuesday."

"Japan's unfolding reactor crisis is fueling a battle over nuclear power across the Pacific, in earthquake-prone California."

"Millions of gallons of radioactive water have leaked from nuclear power plants throughout the U.S. since the 1970s, threatening water supplies in New Jersey and other states, an Asbury Park Press investigation found."

Japan on Monday expanded the evacuation zone around its crippled nuclear plant because of high levels of accumulated radiation, as a strong aftershock rattled the area one month after a quake and tsunami sparked the worst nuclear crisis since Chernobyl."

"U.S. officials say the nation’s health system is ill-prepared to cope with a catastrophic release of radiation, despite years of focus on the possibility of a terrorist 'dirty bomb' or an improvised nuclear device attack."