In a CANDU type of Nuclear reactors, which is true?

Question

Question

This question was previously asked in

ISRO URSC Technical Assistant Mechanical 13 Nov 2016 Official Paper

Answer 1

Explanation:

Nuclear reactor:

It is a device in which a nuclear reaction is initiated, maintained, and controlled.
It works on the principle of controlled chain reaction and provides energy at a constant rate.
The moderator's function in the reactor is to slow down the fast-moving secondary neutrons produced during the fission.
The material of the moderator should be light and it should not absorb neutrons.
Usually, heavy water, graphite, deuterium, and paraffin, etc. can act as moderators.

F1&F2 U.B Shashi 19 07 2019 D 8

CANDU Reactor:

CANDU stands for Canada Deuterium Uranium nuclear reactor.
The function of the moderator and coolant in the CANDU reactor is performed by heavy water.
Natural Uranium is used as fuel for fission in the CANDU reactor.
The heat released by the fission of natural uranium in nuclear reactors must be captured and transferred for use in electricity generation.
To this end, reactors use heavy water coolants that remove heat from the core where the fuel is processed and carry it to electrical generators.
Coolants also serve to maintain manageable pressures within the core.