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TOKYO (Reuters) - Radiation levels at the No. 4 reactor of Japan's earthquake-stricken Fukushima Daiichi nuclear-power plant had become too high on Tuesday to conduct normal work from its control room, Kyodo news agency said.
Workers cannot stay long and are going in and out of the control room as well as monitoring from a different place, Kyodo said.
Japan is facing a potential catastrophe after the nuclear plant exploded and sent low levels of radiation floating toward Tokyo.
Reporting by Chisa Fujioka; Editing by Edwina Gibbs