How Does Nuclear Fission Works

Nuclear fission reaction happens inside a nuclear reactor . Usually , a nuclear electricity reactor uses nuclear fission , not fusion because fission is easier to make and fusion is still impossible to produce more power than the amount of power it uses to occur . Nuclear fission uses Plutonium or Uranium as fuel . Plutonium and Uranium are two heavy elements which have many protons and neutrons in their nuclei .
Fission starts when an fast-moving neutron strikes a nucleus . The nucleus cannot take an extra neutron , and the whole nucleus breaks apart into two smaller nuclei . Several neutrons are also released and these neutrons break more nuclei , which release more neutrons and so on . Without control , it can multiply rapidly and produce enormous heat in a fraction of second . Each fission occurs gamma rays radiation . Gamma ray radiations are harmful and highly penetrating , requires a concrete shield wall for safety .