The No. 4 reactor at Oi nuclear plant in Japan's Fukui province began generating and transmitting electricity July 21, Kansai Electric Power Co. said, Kyodo reported. The 1.18-million-kilowatt reactor is expected to reach full-capacity generation July 25 and will transmit power to the Kansai area in western Japan and part of the Fukui Prefecture on the Sea of Japan. The No. 4 reactor is the second to go offline after Japan's commercial reactors were taken offline for checks after the March 11 nuclear accident at the Fukushima Daiichi plant in northeastern Japan.