The fission chain reaction in a nuclear reactor can be controlled by introducing _______________?
Correct answer: C. Cadmium rods
- A. Iron rods
- B. Graphite rods
- C. Cadmium rods
- D. Platinum rods
Explanation
Cadmium rods absorb neutrons, so inserting them into a reactor reduces the number of neutrons available to cause further fission and controls the chain reaction. Graphite rods are mainly moderators that slow neutrons, so choosing graphite confuses moderation with control.
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