Reference Material: Radiation Exposure Data FY2016
In the 17 nuclear plants other than Fukushima Daiichi, a total of approximately 46,900 workers received a collective dose of 7.60 Person Sv, an average of 0.2 mSv per person. Compared to this, 15,800 workers at Fukushima Daiichi received a collective dose of 45.90 person Sv, an average of 2.9 mSv per person, a much higher exposure to radiation. The Sendai nuclear plant, which was restarted in 2015, had regular inspection shut-downs at Unit 1 from October to December 2016 and at Unit 2 from December 2016 to February 2017. In 2015 there were no exposure doses of over 5 mSv, but probably because of the inspections, exposure doses were higher in 2016.