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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.
Nuclear power plants. Nuclear power plants operate by capturing the energy released from the splitting of the uranium nucleus. This takes place in the reactor (which is used as a heat source) which then heats water which is carried away from the core as steam or superheated water, which is also converted to steam.