 A 2011 Natural Resources Defense Council report that evaluated the seismic hazard to reactors worldwide, as determined by the Global Seismic Hazard Assessment Program data, placed 35 of Japan's reactors in the group of 48 reactors worldwide in very high and high seismic hazard areas.As of May 2019, there are 39 operable reactors in Japan.Of these, 9 reactors in 5 power plants are currently operating.