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How is chain reaction controlled in a nuclear power plant? Chain reaction is controlled through using neutron absorbing materials as reactor control rods (of high neutron absorbing material), boron, and/or cadmium.
A nuclear fission power plant uses the heat generated by a nuclear fission process to drive a steam turbine which generates usable electricity. 1  The underlying physical process is the same for all power plant designs, what differs is the way in which the nuclear reaction is controlled.