The two purposes of water in a reactor core are ______.
A) neutron absorber and heat transfer liquid
B) neutron moderator and heat transfer liquid
C) neutron moderator and neutron absorber
D) neutron absorber and lubricant
E) neutron moderator and radiation shield

Question

Quizplus · Accepted Answer

Water serves as both a neutron moderator and a heat transfer liquid in a reactor core. As a moderator, water slows down fast-moving neutrons, making them more likely to cause fission in the fuel. As a heat transfer liquid, water carries the heat away from the fuel to power turbines and generate electricity. Water does not absorb neutrons to a significant degree. It is not a lubricant and does not provide radiation shielding.

The Two Purposes of Water in a Reactor Core Are