The radiation level inside the troubled Nos. 1 and 3 reactor buildings at the Fukushima Daiichi nuclear power plant was up to about 57 millisieverts per hour as of Sunday, data obtained by remote-controlled robots showed Monday.
A spokesman for the government’s nuclear regulatory body acknowledged that the level made it ’’tough’’ for workers to engage in restoring the reactors’ key cooling functions for prolonged periods, and that it was seeking ways to mitigate radiation exposure. (…)
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