The reactors for Units 1 , 2 , and 6 were supplied by General Electric , those for Units 3 and 5 by Toshiba , and Unit 4 by Hitachi .
The nuclear reactors for units 1 , 2 , and 6 were supplied by General Electric , those for units 3 and 5 by Toshiba , and unit 4 by Hitachi .