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.
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