The popularity of nuclear energy waned, particularly in Asia, in the wake of Japan's Fukushima disaster in 2011 when an earthquake and tsunami triggered one of the worst nuclear accidents since Chernobyl. However, use of nuclear is now recovering, with the damaging impact of fossil fuel alternatives in focus after December's climate summit in Paris saw nearly 200 countries agree to work together to limit global warming.
Japan restarted two nuclear energy facilities in September and November respectively and has approved the restarting of two more next year, although this is subject to an injunction appeal.
India plans to produce 25 percent of its electricity from nuclear power by 2050, according to the World Nuclear Association.
China currently produces most of its electricity from fossil fuels, predominately coal, but is building 22 new nuclear power reactors and is due to start constructing more. It is on track to replace the U.S. as the world's largest uranium consumer, according to Washington D.C.'s Center for Strategic and International Studies.
The top three producers and reserve holders of uranium are Kazakhstan, Canada and Australia, according to the U.K.'s Royal Society of Chemistry. Other countries with known reserves include Russia, the U.S., South Africa, Namibia, Niger, Brazil and Ukraine.