Exam-style question
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Explain how a chain reaction in induced fission is sustained and controlled in a nuclear reactor.
Model answer
What a good answer should say
- A chain reaction in induced fission is sustained when the neutrons released from fission events cause further fission in nearby nuclei.
- Control rods made of materials that absorb neutrons are used to regulate the number of free neutrons, thus controlling the rate of the reaction.
Explanation
Why this works
This answer demonstrates understanding of the mechanisms behind chain reactions and the role of control rods, which is crucial for safety in nuclear reactors. It tests the student's ability to explain complex processes in nuclear physics.
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