they have never built one
No, a nuclear power plant producing electricity is an example of nuclear fission, not fusion. In nuclear fission, the nucleus of an atom is split, releasing energy, whereas in nuclear fusion, atomic nuclei combine to release energy.
Nuclear fusion does not currently occur in nuclear plants. Nuclear plants use nuclear fission, where atoms are split to release energy. Fusion reactions, in which atomic nuclei combine to release energy, are not yet used commercially for electricity generation.
There is very little similarity between present day power plants which use nuclear fission, and any possible nuclear fusion plant of the future
No, because the highest amount of energy needed in a nuclear fusion is 40,000,000 K, which is only known to occur on the sun.
Nuclear Fusion
Nuclear fusion is the process that powers stars, including our sun. The intense heat and pressure in the core of a star creates the conditions necessary for nuclear fusion to occur, releasing vast amounts of energy. Scientists are working on harnessing this same process for practical energy production on Earth through nuclear fusion reactors.
Fusion is a nuclear reaction.
Nuclear fusion produces nuclear energy
0%. No one has an operating fusion power plant. Issues of plasma containment have not been solved. We are working on it, but commercial application is 50 to 100 years away, at best - and it is possible that there will never be a viable solution.
Controlled! ...if the reactor is working properly.
Nuclear fusion reactions occur in the core of stars, including the Sun, where high pressure and temperature conditions allow hydrogen atoms to combine and release a tremendous amount of energy. Scientists are also working on creating controlled nuclear fusion in experimental reactors on Earth as a potential source of sustainable energy.
In a nuclear power plant, nuclear fission is used to generate energy by splitting atoms of uranium or another fuel. This process releases a large amount of heat, which is used to produce steam to drive turbines and generators to create electricity. Nuclear fusion, on the other hand, is a process where atoms are combined at extremely high temperatures and pressures to release energy, but it is not currently used in commercial nuclear power plants due to the technical challenges involved.