So Kyodo News, dateline Tokyo, March 28:
Japan on Sunday faced an increasing challenge of removing highly radioactive water found inside buildings near some troubled nuclear reactors at the Fukushima Daiichi plant, with the radiation level of the surface of the pool in the basement of the No. 2 reactor's turbine building found to be more than 1,000 millisieverts per hour.
Exposure to such an environment for four hours would raise the risk of dying in 30 days. Hidehiko Nishiyama, spokesman for the government's nuclear safety agency, said the figure is ''quite high'' but authorities must find a way to pump out the water without sending workers too close to push ahead with the restoration work.
Plant operator Tokyo Electric Power Co. said early Monday the concentration of radioactive substances of the puddle was 100,000 times higher than that usually measured in water in a reactor core, correcting its earlier analysis of 10 million times higher.
The facts are not altered: 2 Sievert hours might very well kill you, 4 will in 30 days, and 8 will much more quickly than that.
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