Nukes will shut down in blackout conditions because of the two independent power feed safety requirement. You *really* do not want your nuke plant to run out o

Nukes will shut down in blackout conditions because of the two independent power feed safety requirement. You *really* do not want your nuke plant to run out of power (that *will* Fukushima) so when the number of available sources drops too low they shut down so as to reduce the damage should they actually go dark.