A device which controls the rate of nuclear fission reactions is called?

Answer 1

I found this: " The control rods, another important part of the reactor, regulate or control the speed of the nuclear chain reaction, by sliding up and down between the fuel rods or fuel assemblies in the reactor core. The control rods contain material such as cadmium and boron. Because of their atomic structure cadmium and boron absorb neutrons, but do not fission or split. Therefore, the control rods act like sponges that absorb extra neutrons." Here (you may have to copy and paste in two parts): http://www.aboutnuclear.org/view.cgi?fC=Electricity,Operation,Reactor,Control_Rods

Answer 2

The rate of fission in a nuclear reactor is moderated by the insertion of control rods, which absorb some of the neutrons, preventing the reaction from going supercritical and possibly leading to a meltdown. The amount of power being produced, or in other words the intensity of the reaction, is controled by how much of how many control rods are inserted into the core. Some common materials for control rods to be made of include, but are far from limited to: silver, indium, cadmium, boron, colbalt, harnium, etc.

Answer 3

Boron or cadmium control rods are inserted in order to absorb neutrons, reducing the speed of the reaction.

Answer 4

In nuclear reactors control rods are used.

Answer 5

control system

Answer 6

control rod

nuclear reactor

Answer 7

The containment building.