Nuclear Power Engineering
Biological shield is provided in a nuclear power reactor to protect the __________ from radiation damage.

Fuel elements
Operating personnels
Walls of the reactor
None of these

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Nuclear Power Engineering
Water is a better coolant than a gas (like CO₂, He, N₂ etc.), because it

Has a better heat transfer characteristics, and it can be pressurised to attain a high temperature
Requires comparatively smaller pumps and heat exchanger for a given heat transfer rate
All of these
Is a better neutron moderator as well

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