Question : Which of the following is used as a coolant in an atomic reactor?
Option 1: Water
Option 2: Uranium
Option 3: Graphite
Option 4: Boron
Correct Answer: Water
Solution : The correct option is Water .
Pressurised water reactors (PWRs) are a type of nuclear reactor that commonly use regular or light water (H2O) as a coolant and neutron moderator. Heavy water (deuterium oxide, D2O) can also be used as a coolant and moderator, but it is typically used in heavy water reactors (HWRs).
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