Why is it important to control the speed of the chain reaction in a nuclear reactor ?

Atomic bombs use much higher enrichment material with over 90% of U235 to create a massive chain reaction and produce a large amount of energy at one time. The control rods in a nuclear reactor are used to control the speed of the chain reaction and can capture free neutrons before they collide with U235 atoms.

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Atomic bombs use much higher enrichment material with over 90% of U235 to create a massive chain reaction and produce a large amount of energy at one time.

Explanation:

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