Splitting of a nucleus into smaller fragments Happens when they are bombarded with neutrons Releases ENORMOUS amts of energy! Only U-235 & Pu-239 do this!
1 kg of U-235 can release the same energy as 20,000 tons of dynamite exploding Atomic Bombs start an uncontrolled nuclear chain rxn!
Make useful energy by controlling fission Major form of energy is heat Water or coolant must be used to cool the reactor Heat generates steam, which drives a turbine…that creates electricity
Fuel rods with radioactive isotopes that no longer give enough energy Placed in “swimming pools” that keep them cool & acts as a radiation shield
Happens when nuclei combine to produce a nucleus with a greater mass Smaller nuclei fusion creates more energy than fission reactions Solar energy is the result of nuclear fusion