Do you mean to include the entire U.S. as one of those states? Wikipedia lists nuclear's capacity factor as 90.3% in the U.S. in 2009, and 88.7% averaged over 2006-2012, according to the DOE: https://en.wikipedia.org/wiki/Capacity_factor#United_States

The Helion design which Ycombinator funds is pulsed, so sustained burn time isn't applicable. It's also much smaller and cheaper than mainstream tokamaks.