How is nuclear fission reaction carried out in nuclear power plants?

Explanation

(1) In nuclear power plants neutrons are bombareded on atom of Uranium-235.
(2) This causes conversion of Uranium- 235 into its isotape U-236.
(3) U-236 is very unstable and thus forms atoms of Barium and Krypton by nuclear fission. This forms 3 neutrons and 200 MeV energy.
(4) In a similar way three more Uranium-235 atoms are subjected to nuclear fission which then releases energy.
(5) The neutrons released are again used for further nuclear fission reactions. In this way nuclear fission reactions are carried out in controlled manner in nuclear power plants.