Nuclear accidents are often cited by anti-nuclear groups as evidence of the inherent danger of nuclear power. The most well-known nuclear accident, a mishandled safety test at the Chernobyl Nuclear Power Plant in 1986 in Kiev, Ukraine, "killed at least 4056 people and damaged almost $7 billion of property". Radioactive fallout from the accident concentrated near Belarus, Ukraine and Russia and at least 350,000 people were forcibly resettled away from these areas. After the accident, "traces of radioactive deposits unique to Chernobyl were found in nearly every country in the northern hemisphere". Other serious nuclear accidents include the Mayak disaster, Soviet submarine K-431 accident, Soviet submarine K-19 accident, Chalk River accidents, Windscale fire, Church Rock Uranium Mill Spill and the SL-1 accident. The Fukushima nuclear disaster occured in 2011. Clean-up from the Fukushima nuclear disaster is expected to cost over 12 trillion yen ($100 billion) and take 30 to 40 years.