Multiple Failures at Other Plants at the Same Time

Cooling systems for 24 out of 37 diesel generators were shut down by the tsunami and that 14 additional nuclear reactors were impacted. The real cause was the loss of the pumps not the generators.
http://www.fairewinds.org/content/it-could-have-been-worse
The addition of a Level 8 would reflect the nuclear accident scenario at a multi-reactor site that significantly changes the risk factors to the general public and emergency evacuation procedures.