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Control rods
Made of boron to absorb neutrons to decrease rate of nuclear reaction
Nuclear reactor
Where nuclear fission occurs and is used to turn a turbine to turn the generator to generate electricity
Fuel rods
Contains solid fissionable substances
Moderator
Usually water or graphite to slow down emitted neutrons allowing them to be absorbed by the uranium nuclei and trigger fission.
Shielding
Made of concrete and lead to stop radiation escaping