Oh yeah I forgot you want to build a nuclear power plant on the moon... I had the opportunity to tour a nuclear power plant in the year 1997, and although I was a jet mechanic and build planes for the Air Force for several years the technology involved in the construction of such a building is so immense it is beyond my ability to communicate it to you.
Actually, the studies (legitimate studies, not pie-in-the-sky fantasies) that have been done on Lunar exploitation assume the use of solar power almost exclusively; Individual Earth-based solar projects presently can produce as much as 500 MW of power, planned projects may produce as much as 2,000 MW.
http://ecoworldly.com/2008/04/12/mega-solar-the-worlds-13-biggest-solar-thermal-energy-projects/
With no atmosphere to filter sunlight, space-based or Lunar-based solar powerplants have even more potential. The technology isn't lacking, the potential payoff is incredible, it's the political and economic will that's missing.
What annoys me is that the Japanese or the Chinese will see the opportunity much more clearly than our present leadership.