Which is the most commonly used molten metal for cooling of nuclear reactors ?
Correct answer: B. Sodium
- A. Calcium
- B. Sodium
- C. Mercury
- D. Zinc
Explanation
Molten sodium is widely used as a nuclear-reactor coolant because it transfers heat effectively and has a high boiling point, allowing low-pressure operation. Mercury and zinc are not the standard reactor coolant choice in this context.
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