Nuclear Fission

Isotopes of uranium and how they can fission. Discussion of fission products and how the mass difference is manifested in energy released. The number of extra neutrons produced and how a chain reaction is achieved through moderation. What moderators are and why they are needed. Concentration of fissile fuel needed for reactors and bombs. Why losing the coolant in a reactor will stop the chain reactor everywhere except in a reactor like the one at Chernobyl.