Nuclear power costs about $3380/kilowatt capacity in a study that was attempting to roll in those factors. Fuel cost is about 0.8 cents per kilowatt-hour. 30 year lifespan means plant cost per kilowatt-hour is 1.2 cents per kilowatt-hour, so adding you get 2.0 cents per kilowatt-hour. Operating costs 1.4 cents per kilowatt-hour, so 3.4 cents per kilowatt-hour all told.
It's going to take some more research to know how much air fuel synthesis will cost when developed, but it is being developed;
http://www.airfuelsynthesis.com/
Assuming it is only a 25% efficient process, probably too pessimistic by half;
Gasoline is around 33.7 kilowatt-hours per gallon, so 33.7 * 4 = 135 kilowatt-hours.
135 * 3.4 cents = $4.60/gallon.
Quite competitive and will become moreso.
And you have to factor in the security costs for the nation too. We spend a lot of money keeping middle-eastern oil flowing. We could tell them to go to hell if we had this.