Kind of sounds like what NASA is looking at for the Moon Base. A small nuclear reactor not much bigger than a trash can. http://www.nasa.gov/home/hqnews/2008/sep/HQ_08-227_Moon_Power.html
Note: I want to make a political statement in this post, but I cannot on these boards.
heh, was just about to post this... it is however a mini-powerplant designed to power aprox. 10,000 households at a time. so it's not exactly a "personal" power plant (yet). but yeah, kinda made me think of fallout as well.