There are currently (year 2013) 31 countries having nuclear power reactors. The rest are not having nuclear power.
About 450 reactors. You can get a world survey from www.world-nuclear.org
France is the world largest generator of nuclear power by percentage.
I think you must mean how much energy can nuclear power supply , not use, and it is in the world-where else? In the US there are about 100 nuclear reactors and they supply about 20 percent of the nation's electricity
Not sure whether the question means where in the world nuclear power is used or where is used as a power source.Anyhow, nuclear power is used in many countries in the world, both developed and developing countries. In some countries over 70 % of the electricity requirement is covered by nuclear power.Nuclear power is used mainly:As thermal energy in desalination and heating purposes and industryAs mechanical motive power for ships and submarinesAs electrical energy for its known applications.
The largest nuclear power plant in the world is the Kashiwazaki-Kariwa Nuclear Power Plant, with an electrical generating capacity of 8212 MW. There is probably no theoretical maximum, since the number of reactors is rather arbitrary. I have provided a link to the Wikipedia article below.
On december 31 2009 there were a total of 437 nuclear power reactors in operation around the world,around 80% of them developed of countries.
France (having 58 nuclear power reactors and one under construction) with around 80% of its electricity is produced by nuclear power.
In nuclear reactors, there are over 400 operating power reactors world wide
There are over 400 nuclear reactors around the world.
I have put a link to the Wikipedia page, "List of nuclear reactors," below. It seems to be pretty good, and includes some reactors that are not in nuclear plants, such as research reactors.
About 450 reactors. You can get a world survey from www.world-nuclear.org
The world's power needs could be met with 7500 well placed reactors.
There are 104 operating power reactors in the US, and over 400 world-wide
Approx. 30 countries has now nuclear energetic reactors with uranium fuels.
The principal changes are: - fabrication of nuclear weapons - creation of nuclear power reactors - use of depleted uranium in weapons
32 countries in the world are using nuclear electric power.
Most nuclear reactors are built to produce electric power. A single nuclear reactor can generate enough energy to power 1,200,000 homes around the clock. The vast minority of reactors around the world are operated by power or energy companies that are licensed by the government, or by the government itself. Some smaller reactors are constructed for research, and for the production of nuclear materials used in industry and medicine. Plutonium can also be produced in reactors, and its application as a nuclear fuel or a material for a nuclear weapon is widely known.