The purpose of a moderator in a nuclear reactor is to:
A)provide neutrons for the fission process
B)slow down fast neutrons to increase the probability of capture by uranium
C)absorb dangerous gamma radiation
D)shield the reactor operator from dangerous radiation
E)none of the above

Question

Quizplus · Accepted Answer

The purpose of a moderator in a nuclear reactor is to slow down the fast-moving neutrons produced by fission so that they are more likely to be captured by the uranium fuel, leading to sustained fission chain reactions. Neutrons are used to initiate fission, not provided by moderators, and moderators do not absorb gamma radiation or shield the operator.

The Purpose of a Moderator in a Nuclear Reactor Is