Exam-style question
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What is a common safety measure used in controlled fission reactors?.
- A.Using a moderator to slow down neutrons.
- B.Increasing the amount of fissile material.
- C.Removing control rods to enhance reaction speed.
- D.Using high-pressure systems to contain the reaction.
Model answer
What a good answer should say
- Using a moderator to slow down neutrons.
Explanation
Why this works
In controlled fission, a moderator is used to slow down neutrons, which increases the likelihood of further fission reactions while maintaining safety. This contrasts with uncontrolled fission, where no such moderation is applied, leading to rapid and potentially dangerous reactions.
The key difference is that moderation is essential for sustaining a controlled reaction at a safe rate. This safety measure is crucial in nuclear reactors to prevent overheating and meltdowns.
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