Chain Reactions.ppt
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Nuclear fission reactions produce neutrons that cause nearby uranium-235 nuclei to split, releasing more neutrons in a chain reaction that generates a huge amount of energy very quickly, as in an uncontrolled nuclear bomb. Control rods made of neutron-absorbing boron or cadmium can be inserted to slow the chain reaction by absorbing some neutrons, ensuring on average that each fission causes only one additional fission rather than a runaway reaction.
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