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To generate electricity
To produce electricity
In nuclear reactors, to produce electricity
The use of nuclear energy
The use of nuclear power
In nuclear reactors used to generate electricity, and in many nuclear warheads.
No, nuclear fission operates all nuclear reactors. If they are power plant reactors it is used to generate electricity.
Only in that to make plutonium or tritium for nuclear bombs you need a reactor. While the reactors that make these materials can also be used to generate electricity, they usually don't. Also the types of reactors usually used to generate electricity are not usually designed to efficiently make these materials.
Well, as nuclear reactors are nuclear reactors, nuclear reactors are not used inside nuclear reactors.
Fabrication of nuclear fuels to generate electricity in nuclear power reactors.
Electricity, or propulsion in naval vessels.
France (having 58 nuclear power reactors and one under construction) with around 80% of its electricity is produced by nuclear power.