Serious nuclear and radiation accidents include the Chalk River accidents ( 1952 , 1958 & 2008 ) , Mayak disaster ( 1957 ) , Windscale fire ( 1957 ) , SL-1 accident ( 1961 ) , Soviet submarine K-19 accident ( 1961 ) , Three Mile Island accident ( 1979 ) , Church Rock uranium mill spill ( 1979 ) , Soviet submarine K-431 accident ( 1985 ) , Goiânia accident ( 1987 ) , Zaragoza radiotherapy accident ( 1990 ) , Costa Rica radiotherapy accident ( 1996 ) , Tokaimura nuclear accident ( 1999 ) , Sellafield THORP leak ( 2005 ) , and the Flerus IRE cobalt-60 spill ( 2006 )
Three Mile Island accident
Three Mile Island accident
Nuclear safety and security