Earlier, there were signs that the battle may have turned a corner, with cooling functions at two reactors apparently working again, a development that could ease a nuclear emergency that has gripped the nation for more than a week after a magnitude-9.0 earthquake and tsunami struck March 11.
External power for units 3 and 4 should be in place 'in a few days time', said Tepco.
That would mean that power would be restored to all six of the reactors at that point. (unit 5,6 were first and now units 1 and 2 and in a few days 3 and 4.
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