The problem is the fudgeing regulations. There's so many of them that building new plants is pretty much impossible, thus forcing them to use outdated technology and MAKING A CATASTROPHE MORE LIKELY.
IT'S MADNESS
Fun Fact: I'm at a Chinese powerplant that is under construction right now. It's in a scenic location that required moving a small mountain but positions it on a great heat sink (a river mouth with sea access) and protection from harsh weather (there's a typhoon outside and it's all good). They're the first to build the new AP1000 reactor which has some incredible designs. The company that makes it is Westinghouse Electric and is American. So ya, the fun fact is that American Engineers are building some of the most advanced reactors in the world for China.
Oh, and if you want an example of old reactor that needs to be replaced, Indian Point is in dire need of a sucessor. Of course we aren't building any new plants and it supplies about 25% of the power to New York City so it's kinda stuck there for a while...
Also, I forgot how nice Sal's is to Nuclear Power. I missed it.