Heavy water (D2O) in a nuclear reactor serves as a_______________?
Correct answer: C. Both A. & B.
- A. Coolant
- B. Moderator
- C. Both A. & B.
- D. Neutron absorber
Explanation
Heavy water can perform both functions: it removes heat as a coolant and slows neutrons as a moderator. Its low neutron-absorption tendency makes it useful in heavy-water reactors.
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