Coolant used in a fast breeder reactor is____________________?
Correct answer: A. Molten sodium
- A. Molten sodium
- B. Heavy water
- C. Ordinary water
- D. Helium
Explanation
Fast breeder reactors avoid moderators, so they use molten sodium, which removes heat efficiently without greatly slowing neutrons. Water and heavy water would moderate the neutrons, while helium is used in some gas-cooled designs.
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