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slows down fission

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Q: How do control rods speed up or slow down fission?
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What is the role of control rods in a fission?

what is the role of control rods in a fission reaction


What is the role of control rods in a fission reaction?

what is the role of control rods in a fission reaction


What does lower control rods result in?

We lower control rods to cool or shut down a nuclear reactor. Lowering control rods allows those rods to absorb more neutrons, and this limits or shuts the fission chain down.


What is the function of a control rods reactor?

Control rods are used in a reactor to control the rate at which fission happens.


Which safety feature works to slow down nuclear fission chain reactions?

control rods APEX USERS


What are the functions of moderater and control rods in a nuclear power plants?

Moderator such as graphite or heavy water would reduce the speed of neutron there by making them as thermal neutrons. Such slow speed neutrons are needed to bring Uranium-235 into fission. Control rods such as Boron carbide or Cadmium are there to abosorb neutrons. So chain reaction of fission is ketp under control.


How is the rate of the fission in a nuclear reactor controlled?

By the control rods and by the moderator.


How do control rods stop a fission reaction?

Control rods have a large neutron absorption cross section. That means that they slow down, absorb, and effectively stop neutrons. In order to sustain a fission reaction, you need a certain number of neutrons of a certain energy interacting with fissile material at a certain rate so that everything is in equilibrium. When you insert the control rods, you bring the core geometry to a sub-critical state, what we call KEffective < 1, and the fission reaction stops.


What is a device that controls the rate of nuclear fission reactions?

Control rods are used.


A nuclear reactor produces energy from uncontrolled fission?

False, the fission in nuclear reactors is controlled with the movable control rods.


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

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


What are hanger rods in regard to power plants?

Hanger rods are used in nuclear power plans as a means by which to control the fission reactions and thereby prevent meltdowns. The rods absorb free neutrons and thus limit the number of fission reactions taking place at any given moment. To this extent, rods can be either added or taken away to control the fission rate (and consequently the power output)