A sodium graphite reactor uses ______
A. Sodium as coolant and Graphite as moderator
B. A mixture of Sodium and Graphite as coolant
C. A mixture of Sodium and Graphite as moderator
D. Sodium as moderator and Graphite as coolant
Please scroll down to see the correct answer and solution guide.
Right Answer is: A
SOLUTION
Concept:
Coolant:
Reactors use 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.
Ex: water, heavy water, air, carbon dioxide, helium, liquid sodium, and sodium-potassium alloy, etc.
Moderator:
The moderator of a nuclear reactor is a substance that slows neutrons down.
Ex: water, beryllium, graphite, heavy water, etc.
In the Sodium-Graphite reactor, Sodium as a Coolant, Graphite as a Moderator and reflector and Low enrichment Uranium as a fuel.