Question

Out of Cd, molten Na - metal and graphite, which can be
used respectively, as moderator, coolant and the material
for control rods in a reactor?
(A) molten Na-metal, graphite, Cd
(B) graphite, molten Na-metal, Cd
(C) Cd, molten Na-metal, graphite
(D) graphite, Cd, molten Na-metal​

Answer 1

Answer:

graphite is used as coolant.

Answer 2

The correct answer is option (b) graphite, molten Na-metal, Cd.

• Graphite is used as a coolant, molten Na-metal is used as moderator, and Cd is used as the material for control rods.
• A coolant could be a substance, typically liquid or gas, wont to scale back or manage the temperature of a system. an honest coolant has high heat capability, low viscousness, low cost, non-toxic, with chemicals stable and doesn't cause or promote corrosion of the cooling system.
• Control rods, plates, or tubes contain a substance that absorbs neutrons (substances that contain an outsized quantity of the absorption of the hot neutron) like element, hafnium, cadmium, etc.

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