The crack in a maintenance pit at the Fukushima Daiichi nuclear power plant in Japan is the source of radioactive iodine appearing in seawater near the plant for more than a week.
Fifty workers and fire hoses are all that remain at Japan's Fukushima I plant to cool three hot reactors and six pools containing spent fuel rods – perhaps for months to come.
A nuclear plant in Japan is said to declare a state of emergency, as backup power used to cool three reactors runs low. Help is on the way. 'It's a dicey situation,' says nuclear specialist in US.