The actual gains from such a change in operation wouldn't gain you very much extra energy.

If you wanted to run nuclear power long term you, IMHO, really need to get into breeder reactors but even there the raw material needed is lowered per unit energy output but it isn't eliminated. And it does nothing to change the basic fact that there are limited supplies of raw materials, few mines, and they tend to be in unstable parts of the world.

Breeder reactors are a proven technology for extending the available fuel supply but it is not a complete solution. Even as a partial solution they have issues because they produce weapons-grade materials. Weapons-grade materials open up a whole kettle of fish in terms of politics, international relations, security, NIMBY, and potential danger. Light-water energy generation plants really can't blow up, as in a mushroom cloud. They may melt and leak, making a huge mess, but they generally don't explode like a nuclear weapon. Breeder reactors are working with and produce materials which can go up like a weapon. Thorium-cycle reactors make some sense but they remain on the drawing board.

I really suspect that natural gas fuel cell units are more promising as a generation system than nuclear as it is done presently. Fuel cell units are practical, adaptable (they can be turned off and on to handle peak loads), and scalable. They are becoming commonplace as backup, or uninterruptable power, for large data/server systems.

As I pointed out there isn't any real need to build any more power generation to accommodate electric cars in the next ten years. All-electric vehicles are not expected to be the majority for decades and the early adopters will naturally be in and around urban areas where daily mileage is low. For most commuters the electrical load and cost is on par with running a standard electric heater, about $1.25 a night. A bit less than what they spend on gasoline now.

A good percentage of the 'electric' market in vehicles is gas/electric hybrids that use no energy from the electrical grid at all. They use gasoline, just like regular cars, just a little more efficiently by storing the excess power from the gasoline engine to charge a battery bank.

Europe has shifted from gasoline to small diesel engines.

There is a quiet revolution coming but because it is going to take decades to play there are few large shocks to the system. There will be shocks, but these are being manufactured. Saudi-Arabia has committed to making up any difference in amounts of oil pumped to keep the supply stable. The present run-up in gasoline prices is a result of speculation and gouging, not anything going on in Egypt, Libya.

A good example of gouging was spotted near Tampa where Shell gas stations near the interstates and airports are charging over $5 a gallon and simply not posting the price. People have got into the habit of assuming that all gas stations sell at the same price plus or minus a few cents. People don't often check the price on the pump. So they assume it is $3+, whatever the going price, and they pump a tank full. When they go to pay, assuming they don't just shove the card in without looking, ... surprise!!.