Nuclear power | Wikipedia audio article
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Date: 2018-11-22

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Nuclear power

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SUMMARY
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Nuclear power is the use of nuclear reactions that release nuclear energy to generate heat, which most frequently is then used in steam turbines to produce electricity in a nuclear power plant. 
Nuclear power can be obtained from nuclear fission, nuclear decay and nuclear fusion. 
Presently, the vast majority of electricity from nuclear power is produced by nuclear fission of uranium and plutonium.
Nuclear decay processes are used in niche applications such as radioisotope thermoelectric generators.
The possibility of generating electricity from nuclear fusion is still at a research phase with no commercial applications.
This article mostly deals with nuclear fission power for electricity generation.
Nuclear power is one of the leading low carbon power generation methods of producing electricity.
In terms of total life-cycle greenhouse gas emissions per unit of energy generated, nuclear power has emission values comparable or lower than renewable energy.
From the beginning of its commercialization in the 1970s, nuclear power prevented about 1.84 million air pollution-related deaths and the emission of about 64 billion tonnes of carbon dioxide equivalent that would have otherwise resulted from the burning of fossil fuels in thermal power stations.Civilian nuclear power supplied 2,488 terawatt hours (TWh) of electricity in 2017, equivalent to about 10% of global electricity generation.
As of April 2018, there are 449 civilian fission reactors in the world, with a combined electrical capacity of 394 gigawatt (GW). 
Additionally, there are 58 reactors under construction and 154 reactors planned, with a combined capacity of 63 GW and 157 GW, respectively. Over 300 more reactors are proposed.
Most of reactors under construction are of generation III reactor design, with the majority in Asia.There is a social debate about nuclear power.
Proponents, such as the World Nuclear Association and Environmentalists for Nuclear Energy, contend that nuclear power is a safe, sustainable energy source that reduces carbon emissions.
Opponents, such as Greenpeace and NIRS, contend that nuclear power poses many threats to people and the environment.
Some accidents have occurred in nuclear power plants. 
These include the Chernobyl disaster in the Soviet Union in 1986, the Fukushima Daiichi nuclear disaster in Japan in 2011, and the more contained Three Mile Island accident in the United States in 1979.
There have also been some nuclear submarine accidents.
In terms of lives lost per unit of energy generated, nuclear reactors have caused the lowest number of fatalities per unit of energy generated when compared to the other major energy producing methods.
Coal, petroleum, natural gas and hydroelectricity each have caused a greater number of fatalities per unit of energy, due to air pollution and accidents.