Phillips looked at the position of the control rods; they weren't moving.

What do the control rods sound as if they're doing?

Right what would happen if you didn't have any control rods, in your nuclear reactor?

Thus the plant controls itself around a given temperature set by the position of the control rods.

Finally, I want to withdraw the control rods from the reactor.

I'll call him when it's time to pull the control rods.

With that, he lowered the control rods back into the pile.

The function of the control rods was to regulate the reaction.

In a test, operators withdrew all 66 control rods, one at a time.

I have a control rod with me, but no external power source.