 In April 2017 the Nuclear Regulation Authority approved plans to decommission the Genkai 1, Mihama 1 and 2, Shimane 1 and Tsuruga 1 reactors.In terms of consequences of radioactivity releases and core damage the Fukushima I nuclear accidents in 2011 were the worst experienced by the Japanese nuclear industry, in addition to ranking among the worst civilian nuclear accidents, though no fatalities were caused and no serious exposure of radiation to workers occurred.The Tokaimura reprocessing plant fire in 1999 had 2 worker deaths, one more exposed to radiation levels above legal limits and over 660 others received detectable radiation doses but within permissible levels, well below the threshold to affect human health.