Tokyo Electric Power Co. said Tuesday that the radiation level inside the reactor 2 at the Fukushima No. 1 power plant was at an extremely high level of 31.1 to 72.9 sieverts per hour, underscoring the existence of radioactive substances from the melted fuel inside the structure.
Tepco measured the radiation level by inserting a long dosimeter into the flask-shaped primary containment vessel, where fuel is thought to be accumulating at the bottom.
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