When nuclear fission takes place heat is produced, this is all usable to produce steam for the power plant. Perhaps you mean how much of the U-235 is usable? In a light water reactor the fuel is around 4 percent U-235 to start and is discharged at around 1 percent or perhaps a bit less, so you could say that about three quarters of the original U-235 in the fuel is used.
zero percent! Nobody has succeeded yet in making fusion work
yes. this is because nuclear power plants use nuclear fusion
Nuclear fusion is used only in experimental installations.
Nuclear fusion is used in some nuclear power plants that can handle the heat and radiation without suffering a meltdown. You should check out nuclear fission in power plants first.
Because no one has been able to produce a continuous fusion reaction so far.
No, a fission reaction is not necessary to trigger a fusion reaction, but for us on earth, it is. In the field of nuclear weapons, a fission bomb is needed to create the heat necessary to set off a fusion weapon. We have to use fission, or, rather, the energy created by that, to initiate the fusion reaction. It might be possible to use a high power source, like a laser, on a small amount of material to get fusion to occur. But we are still experimenting with this in the Tokamak, and it's far from being a done deal. Stars are, in general, massive nuclear fusion reactors. Their constant consumption of fuel powering their high rate of fusion creates a massive amount of energy, and the stars' huge gravity keeps this process from blowing the whole thing apart. No fission is needed to sustain this reaction.
None of them do.
Zero, and it will stay zero for many years to come!
No, they rely on fission. Controlled fusion is the holy grail of nuclear power.
yes. this is because nuclear power plants use nuclear fusion
Nuclear fusion is used only in experimental installations.
Nuclear fusion is used in some nuclear power plants that can handle the heat and radiation without suffering a meltdown. You should check out nuclear fission in power plants first.
The source of energy in almost all nuclear power plants is fission or the splitting of the atom. There are a few experimental fusion power plants, (or the joining of the atoms), but, there are few of them, since the energy needed to produce fusion is extremly high, and only last a few seconds. Around 99.99% of nuclear power plants are fission power plants.
We don't yet know how to use fusion in a power plant. All nuclear power plants use fission only. Fusion is much harder, but will be better if we can figure it out.
Because no one has been able to produce a continuous fusion reaction so far.
There is very little similarity between present day power plants which use nuclear fission, and any possible nuclear fusion plant of the future
Mostly power plants operating with fission reactors. Also experiments with nuclear fusion, and nuclear weapons
100%