Fast-neutron reactor moderation requirement: identify the correct moderator choice. Context: Reactor designed to operate with fast neutrons using highly enriched fuel. Choose the correct statement about the moderator.
Mechanical Engineering
IC Engines and Nuclear Power Plants
Difficulty: Easy
Choose an option
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AHeavy water is required
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BGraphite is required
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CCarbon dioxide is required
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DNo moderator is needed
Answer
Correct Answer: No moderator is needed
Explanation
ConceptFast reactors rely on fast neutrons for fission and therefore deliberately avoid slowing (moderating) neutrons. Highly enriched fuel enables a self-sustaining chain reaction without a moderator.
Final AnswerNo moderator is needed.