This story was made public about a month ago, but hey, better late than never:
NASA engineers are exploring the possibility of nuclear fission to provide the necessary power and taking initial steps toward a non-nuclear technology demonstration of this type of system.Nuclear energy is used to power submarines, used to power millions of homes and businesses, and used to power rockets going to other planets, to name a few. It looks like there's not one thing nuclear energy can't power.
A fission surface power system on the moon has the potential to generate a steady 40 kilowatts of electric power, enough for about eight houses on Earth. It works by splitting uranium atoms in a reactor to generate heat that then is converted into electric power. The fission surface power system can produce large amounts of power in harsh environments, like those on the surface of the moon or Mars, because it does not rely on sunlight...
Picture of the proposed fission surface power system.