General Electric defended the design of the reactor , stating that the station blackout caused by the 2011 Tōhoku earthquake and tsunami was a " beyond-design-basis " event which led to Fukushima I nuclear accidents . According to the Nuclear Energy Institute , " Coincident long-term loss of both on-site and off-site power for an extended period of time is a beyond-design-basis event for the primary containment on any operating nuclear power plant "
2011 Tōhoku earthquake and tsunami
2011 Tōhoku earthquake and tsunami
Boiling water reactor safety systems