TOKYO, March 15, Kyodo

The radiation level at the troubled nuclear plant in Fukushima Prefecture shot up to 8,217 micro sievert per hour temporarily Tuesday morning after an explosion was heard at its No. 2 reactor, Tokyo Electric Power Co. said.

The level as of 8:31 p.m. was more than eight times the 1,000 micro sievert level to which people are usually exposed in one year.
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