- “1” in the diagram above represents the (A) control rods
(B) moderator
(C) fuel rods
(D) concrete shields
(E) condensers- “3” in the diagram above represents the (A) control rods
(B) moderator
(C) fuel rods
(D) concrete shield
(E) heat exchanger- Which one of the statements below is TRUE regarding the moderator and
the control rods in a moderated nuclear reactor?