Nuclear generating capacity additions began in the 1950s and now top 346 gigawatts worldwide (click on animation above to assess trends). The first nuclear reactor to produce electricity was a very small experimental reactor in the United States in 1951. Currently, 30 countries have nuclear power programs.
From the early 1970s to the early 1990s, nuclear power steadily grew around the world with brief periods of relatively slow growth following the accidents at Three Mile Island (North America, 1979) and Chernobyl (Former Soviet Union, 1986), as the nuclear industry absorbed the lessons learned from both accidents. Since then, nuclear power capacity has remained relatively stable throughout most of the world, with the exception of rapidly developing countries in Asia. An upcoming Today in Energy article will address post-Fukushima impacts on Japan's nuclear capacity.
Regional trends:
Plans to add new nuclear capacity in North America and Europe are relatively small in comparison to those in such countries as China, Korea, and India. Projected increased electricity demand in rapidly developing countries coupled with energy security awareness and the desire to limit carbon emissions are contributing to the worldwide addition of new nuclear capacity.