In the past few months, engineers have announced some reletively simple changes that will increase the safety and efficiency of nuclear plants.
For example, a group at MIT have found that by making Uranium fuel pellets hollow, like tubes (Right now they are basically solid slugs) it's possible to increase the fuel efficiency by 50%.http://www.abc.net.au/news/newsitems/200610/s1752824.htm
Yes that's right folks. One minor change, and we get a 50% pop. That's an incredible increase. Compare that to oil or coal plants, or wind or solar systems, where it takes decades to squeeze out a 2 or 3 percent increase.
This is a perfect example of why nuclear power is the long-term winner of the energy race on this planet. It's already the safest, cleanest, and most efficient energy source on the planet...AND we've only barely begun to see the kind of improvements that will come over time.
In another 20 years or 50 years, nuclear plants will become so powerful and efficient, fossil fuels, and probably most renewables, will simply be unable to compete.