A fast breeder reactor____________________?
Correct answer: B. Does not require a moderator
- A. Uses natural uranium as fuel
- B. Does not require a moderator
- C. Both A. and B.
- D. Neither A. nor B.
Explanation
A fast breeder reactor does not use a moderator, because moderation would slow the neutrons and reduce fast-neutron breeding. It normally uses enriched uranium or plutonium rather than ordinary natural uranium as its principal fuel.
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