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Q. |
Which of the following is used as a coolant in nuclear reactors? |
A. | Heavy water |
B. | Cadmium |
C. | Liquid sodium |
D. | Graphite |
Answer» C. Liquid sodium | |
Explanation: Liquid metallic sodium may be used as the sole coolant, carrying heat from the core. Sodium has only one stable isotope, sodium-23. Sodium-23 is a very weak absorber of neutrons. |
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