Water is a better coolant than a gas (like CO2, He, N2 etc.), because it_________________?
Correct answer: D. All A., B. and C.
- A. Is a better neutron moderator as well
- B. Require comparatively smaller pumps and heat exchanger for a given heat transfer rate
- C. Has a better heat transfer characteristics, and it can be pressurised to attain a high temperature
- D. All A., B. and C.
Explanation
Water has much higher density, heat capacity, and heat-transfer capability than gases, so smaller equipment can handle the same duty; pressurisation also permits high-temperature operation. It is additionally an effective neutron moderator, making all three statements valid.
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