Exam-style question
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Describe the role of moderators in controlling chain reactions during induced fission.
Model answer
What a good answer should say
- Moderators slow down the fast neutrons produced during fission, increasing the likelihood of these neutrons being captured by fissile nuclei, which sustains the chain reaction.
- Common moderators include water and graphite.
Explanation
Why this works
This answer effectively outlines the function of moderators in enhancing the efficiency of the fission process, which is essential for maintaining a controlled reaction. It assesses the student's grasp of nuclear reactor operations.
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