Right now it can only be used in weapons, no fusion reactor experiment yet has even reached breakeven (releasing as much energy as was put in to start fusion). You must go well past breakeven to get usable power.
yes. this is because nuclear power plants use nuclear fusion
Nuclear fusion is not used for any purpose at present, it is still in the experimental phase
nuclear fusion
Nuclear fusion rocket technology is too expensive to use as a means for power production.
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 it is a fission process, not fusion
Fission
Nuclear Fusion
There is very little similarity between present day power plants which use nuclear fission, and any possible nuclear fusion plant of the future
Nuclear fusion is unsure now at industrial scale.
Because it is a fission process, not fusion
Nuclear energy as we use it now is from nuclear fission. Nuclear fusion is the joining up of nuclei rather than the splitting (fission), but it is not yet available on Earth.