Question

Moderator in nuclear reactor is made up of

Answer 1

moderator in nuclear reactor is made up of graphite

Answer 2

Commonly used moderators include regular (light) water (roughly 75% of the world's reactors), solid graphite (20% of reactors) and heavy water (5% of reactors). Beryllium and beryllium oxide (BeO) have been used occasionally, but they are very costly.