How does work nuclear reactor?
Nuclear reactor: It is an apparatus in which nuclear fuel (U235) is subjected to nuclear fission. It control the chain reaction that starts once the fission is done. If the chain reaction is not controlled, the result will be an explosion due to the fast increase in the energy released
A nuclear reactor is a cylindrical stout pressure vessel and houses fuel rods of uranium, moderator and control rods. The fuel rods constitute the fission material and release huge amount of energy when bombarded with slow moving neutron. The moderator consists of graphite rods which enclose the fuel rods. The moderator slow down the neutron before they bombard the fuel rods.
The control rods of cadmium and are inserted into the reactor.cadmium is strong neutron absorber and thus regulates the supply of neutron for fission. When the control rods are pushed in deep enough,they absorb most of fission neutron and hence few are available for chain reaction which, therefore,stops. However,as they are being withdrawn, more and more of these fission neutron cause fission and hence the intensity of chain reaction is increased. The heat produced in the reactor is removed by the coolant, generally a sodium metal. The coolant carries the heat to the heat exchanger.
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