Nuclear labor issues the most dangerous tasks within the industry is intensified by nuclear secrecy. On May 22, 1986, a nuclear fuel reprocessing plant at La Hague in Normandy, sustained a mechanical malfunction. Five workers were exposed to unsafe levels of radiation and hospitalized. On April 12, 1987, the Tricastin Nuclear Power Plant fast breeder reactor coolant leaked contaminating seven workers. In July 2008, approximately 100 workers were exposed to a radiation leak. The Chernobyl nuclear reactor meltdown occurred on April 26, 1986, in the Ukraine, during a test of the Unit 4 reactor systems. The explosion and fire caused by human error
South Ukraine Nuclear Power Plant following major upgrade work, unit 1 was given a 10-year license extension, which will take it beyond its original 30-year design lifetime. Similar extensions are planned for units 2 and 3, licensed until 2015 and 2019, respectively. The main supplier of fuel for nuclear power plants in Ukraine has been TVEL, with whom NNEGC signed a contract for the supply of nuclear fuel for Ukrainian WMR in 1997 until 2010. Under a US-Ukrainian initiative to reduce Ukraine's dependency on Russia for fuel, tied to the dismantling of its nuclear weapon arsenal, Energoatom had been using reactor core of unit 3