Title: Energy security
Content:  Uranium for nuclear power is mined and enriched in diverse and "stable" countries. These include Canada (23% of the world's total in 2007), Australia (21%), Kazakhstan (16%) and more than 10 other countries. Uranium is mined and fuel is manufactured significantly in advance of need. Nuclear fuel is considered by some to be a relatively reliable power source, being more common in the Earth's crust than tin, mercury or silver, though a debate over the timing of peak uranium does exist. Nuclear power reduces carbon emissions. Although a very viable resource, nuclear power is controversial due to the risks associated with it. Another factor in the debate with nuclear power is that many people or companies simply do not want any nuclear energy plant or radioactive waste near them. Currently, nuclear power provides 13% of the world's total electricity. The most notable use of nuclear power within the United States is in U.S. Navy aircraft carriers and submarines, which have been exclusively nuclear-powered for several decades. These classes of ship provide the core of the Navy's power, and as such are the single most noteworthy application of nuclear power in the United States.
Title: Nuclear power by country
Content:   Nuclear power plants currently operate in 32 countries. Most are in Europe, North America, East Asia and South Asia. The United States is the largest producer of nuclear power, while France has the largest share of electricity generated by nuclear power, at about 70%. China has the fastest growing nuclear power program with 13 new reactors under construction, and a considerable number of new reactors are also being built in India, Russia and South Korea. Some countries operated nuclear reactors in the past but have currently no operating nuclear plants. Among them, Italy closed all of its nuclear stations by 
Title: Energy development
Content:  Nuclear power is the use of nuclear fission to generate useful heat and electricity. Fission of uranium produces nearly all economically significant nuclear power. Radioisotope thermoelectric generators form a very small component of energy generation, mostly in specialized applications such as deep space vehicles. Nuclear power plants, excluding naval reactors, provided about 5.7% of the world's energy and 13% of the world's electricity in 2012. In 2013, the IAEA report that there are 437 operational nuclear power reactors, in 31 countries, although not every reactor is producing electricity. In addition, there are approximately 140 naval vessels using nuclear propulsion in operation, powered by some 180 
Title: Outline of nuclear power
Content:  The following outline is provided as an overview of and topical guide to nuclear power: Nuclear power &ndash; the use of sustained nuclear fission to generate heat and electricity. Nuclear power plants provide about 6% of the world's energy and 13–14% of the world's electricity, with the U.S., France, and Japan together accounting for about 50% of nuclear generated electricity.
Title: Nuclear power
Content:  power provides 26% of the electricity as of 2018. Nuclear power is the single largest low-carbon electricity source in the United States, and accounts for two-thirds of the European Union's low-carbon electricity. Nuclear energy policy differs among European Union countries, and some, such as Austria, Estonia, Ireland and Italy, have no active nuclear power stations. In addition, there were approximately 140 naval vessels using nuclear propulsion in operation, powered by about 180 reactors. These include military and some civilian ships, such as nuclear-powered icebreakers. International research is continuing into additional uses of process heat such as hydrogen production (in support of a hydrogen economy), for desalinating sea water, and for use in district heating systems.
Title: The Doomsday Machine (book)
Content:  market for nuclear power stations being the case in point. The book describes how fossil fuels remain the main source of energy for the world, while nuclear power manages to meet only three percent of the needs of world energy. This leads to the question: why is the figure so low when it is often read that nuclear is a key part of the "world energy mix"? The authors explain that the trick is in the "fiddling" of statistics, writing that the "key point about world energy is that it is almost all thermal. Whether it is created by burning coal, oil or gas, or firewood or dung, or even running nuclear power plants, the first thing produced is heat".
Title: Nuclear power by country
Content:   Of the 32 countries in which nuclear power plants operate, only France, Slovakia, and Ukraine use them as the source for a majority of the country's electricity supply as of 2020. Other countries have significant amounts of nuclear power generation capacity. By far the largest nuclear electricity producers are the United States with 789,919 GWh of nuclear electricity in 2020, followed by China with 344,748 GWh. As of December 2020, 448 reactors with a net capacity of 397,777 MWe are operational, and 51 reactors with net capacity of 53,905 MWe are under construction. Of the reactors under construction, 13 reactors with 12,565 MWe are in China and 6 reactors with a capacity of 4,194 MWe are in India.
Title: Nuclear power
Content:  combined electrical capacity of 392 gigawatt (GW). There are also 53 nuclear power reactors under construction and 98 reactors planned, with a combined capacity of 60 GW and 103 GW, respectively. The United States has the largest fleet of nuclear reactors, generating over 800 TWh per year with an average capacity factor of 92%. Most reactors under construction are generation III reactors in Asia. Regional differences in the use of nuclear power are large. The United States produces the most nuclear energy in the world, with nuclear power providing 20% of the electricity it consumes, while France produces the highest percentage of its electrical energy from nuclear reactors – 71% in 2019. In the European Union, 
Title: Nuclear Energy Agency
Content: 🇦🇷 argentina ; 🇦🇺 australia ; 🇦🇹 austria ; 🇧🇪 belgium ; 🇧🇬 bulgaria ; 🇨🇦 canada ; 🇨🇿 czech republic ; 🇩🇰 denmark ; 🇫🇮 finland ; 🇫🇷 france ; 🇩🇪 germany ; 🇬🇷 greece ; 🇭🇺 hungary ; 🇮🇸 iceland ; undefined ; 🇮🇹 italy ; 🇯🇵 japan ; 🇱🇺 luxembourg ; 🇲🇽 mexico ; 🇳🇱 netherlands ; 🇳🇴 norway ; 🇵🇱 poland ; 🇵🇹 portugal ; 🇷🇴 romania ; undefined ; 🇸🇰 slovakia ; 🇸🇮 slovenia ; 🇰🇷 south korea ; 🇪🇸 spain ; 🇸🇪 sweden ; 🇨🇭 switzerland ; 🇹🇷 turkey ; 🇬🇧 united kingdom ; 
Title: Nuclear technology
Content:  Nuclear power is a type of nuclear technology involving the controlled use of nuclear fission to release energy for work including propulsion, heat, and the generation of electricity. Nuclear energy is produced by a controlled nuclear chain reaction which creates heat—and which is used to boil water, produce steam, and drive a steam turbine. The turbine is used to generate electricity and/or to do mechanical work. Currently nuclear power provides approximately 15.7% of the world's electricity (in 2004) and is used to propel aircraft carriers, icebreakers and submarines (so far economics and fears in some ports have prevented the use of nuclear power in transport ships). All nuclear power plants use fission. No man-made fusion reaction has resulted in a viable source of electricity.

Question: where is nuclear energy used most in the world?
Answer: United States.
France.