Only two other Japanese reactors are currently in commercial operation.
Unit 3 of the Ikata nuclear power plant in Japan's Ehime prefecture has resumed commercial operation, Shikoku Electric Power Company announced. According to World Nuclear News, Ikata 3 had been idle since being taken offline for a periodic inspection in April 2011. However, Shikoku began the process to restart Ikata 3 on 12 August and the reactor attained criticality the following day.
The 846 MWe pressurized water reactor resumed power generation on 15 August and reached 100% operating capacity on 22 August.
Shikoku said the reactor completed a full-power performance inspection by the Nuclear Regulation Authority at 4.00pm in September 7, when it was declared to be in commercial operation once again. Ikata 3 became the fifth Japanese reactor to resume operation under new safety standards introduced following the March 2011 accident at the Fukushima Daiichi plant.