This article lists notable civilian accidents involving fissile nuclear material or nuclear reactors.
Civil radiation accidents not involving fissile material are listed at List of civilian radiation accidents.
In listing civilian nuclear accidents, the following criteria have been followed: Workers were evacuated and the reactor hall was cordoned off, but none of the staff was exposed to greater than the daily permitted limit of radiation.
[53][54][55] After the 2011 Tōhoku earthquake and tsunami of March 11, the emergency power supply of the Fukushima-Daiichi nuclear power plant failed.
This was followed by deliberate releases of radioactive gas from reactors 1 and 2 to relieve pressure.