Question

In which of the Following reactor is heavy hydrogen isotope H-2 is used as moderator?

(a) Boiling water reactor

(b) Pressurized water reactor

(c) Candu reactor

(d) Thermal reactor

This question was posed to me by my college professor while I was bunking the class.

The origin of the question is Types of Nuclear Reactor & Nuclear Waste in chapter Nuclear Power Plant of Energy Engineering

Answer 1

Correct answer is (c) Candu reactor

To elaborate: Heavy water composed of heavy hydrogen isotope H-2 is used as a moderator and coolant in some power and research reactors. These reactors use heavy water as a moderator and primary coolant and light water as secondary coolant.