Guardian: Radiation levels 18 times higher than previously reported have been found near a water storage tank at the Fukushima Daiichi nuclear power plant, prompting fresh concern over safety at the wrecked facility.
The plant's operator, Tokyo Electric Power (Tepco), said radiation near the bottom of the tank measured 1,800 millisieverts an hour high enough to kill an exposed person in four hours.
Tepco said water levels inside the tank had not changed, indicating there had not been a leak. But the...