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
Nuclear weapons and Ukraine by Russia. Ukraine would also have struggled with replacing the nuclear weapons once their service life expired, as Ukraine did not have a nuclear weapons program. In exchange for giving up its nuclear weapons, Ukraine received financial compensation, as well as the security guarantees of the Budapest Memorandum. On December 5, 1994 the leaders of Ukraine, Russia, Britain and the United States signed a memorandum to provide Ukraine with security assurances in connection with its accession to the NPT as a non-nuclear weapon state. The four parties signed the memorandum, containing a preamble and six paragraphs. The memorandum reads as