September 30, 2021
For educational institutions
Major Nuclear Accidents
⟶ Updated 24 Oct 2018 ⟶
List of edits
Chalk River (Canada): A reactor shutoff rod failure, combined with several operator errors, led to a major power excursion of more than double the reactor's rated output at AECL's NRX reactor
Windscale Pile (UK): Release of radioactive material to the environment following a fire in a reactor core.
Kyshtym (Russia): Significant release of radioactive material to the environment from explosion of a high activity waste tank.
Jaslovské Bohunice (Czechoslovakia): Damaged fuel integrity, extensive corrosion damage of fuel cladding and release of radioactivity.
Three Mile Island (US): Severe damage to the reactor core
Saint Laurent des Eaux (France): Melting of one channel of fuel in the reactor with no release outside the site
Chernobyl (Ukraine): Widespread health and environmental effects. External release of a significant fraction of reactor core inventory.
Tomsk (Russia): Pressure buildup led to an explosive mechanical failure
Tokaimura (Japan): Fatal overexposures of workers following a criticality event at a nuclear facility
Fleurus (Belgium): Severe health effects for a worker at a commercial irradiation facility as a result of high doses of radiation
Fukushima (Japan): Reactor shutdown after the 2011 Sendai earthquake and tsunami; failure of emergency cooling caused an explosion
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