The number of control rods in a reactor will vary with the size and the design.
control rods.
Sorry, in any real nuclear reactor every control rod probably absorbs many moles of neutrons per second while the reactor is operating.
number of control rods
In order to slow down the chain reaction in a nuclear reactor, i.e. to reduce KEff, you would insert the control rods.
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
fuel rods and control rods
The control rods inside a nuclear reactor are made out of Boron.
nuclear reactor control rods
control rods.
By the control rods and by the moderator.
Not really. Control rods are used to start up and shut down a nuclear reactor.
They are used in nuclear reactor to control the rate of fission of uranium and plutonium. Because these elements have different capture cross sections for neutrons of varying energies, the compositions of the control rods must be designed for the neutron spectrum of the reactor it is supposed to control.
Sorry, in any real nuclear reactor every control rod probably absorbs many moles of neutrons per second while the reactor is operating.
number of control rods
We see the use of control rods in a reactor to absorb neutrons. These rods are often made of boron.
In order to slow down the chain reaction in a nuclear reactor, i.e. to reduce KEff, you would insert the control rods.
Heavy water