U.S. Nuclear Regulatory Commission (NRC)
http://www.nrc.gov

Nuclear Energy Institute
http://www.nei.org

The American Nuclear Society
http://www.ans.org

U.S. Department of Energy
http://www.energy.gov

Nuclear Energy Agency
http://www.oecd-nea.org

U.S. Energy Information Administration
http://www.eia.doe.gov

World Nuclear Association
http://www.world-nuclear.org