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The cadmium in the control rods slows down a nuclear fission reaction by absorbing neutrons true or false?
Wiki User
∙ 6y ago
True. Cadmium (and boron plus some other elements) absorbs neutrons, thus limiting or slowing the fission chain in a nuclear reactor.
Wiki User
∙ 6y ago
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What is the purpose of the cadmium rods in a nuclear fission reactor?
Cadmium is a very strong absorber of neutrons and therefore can be used to control the chain reaction and to shutdown the reactor when required. Boron is also often used for the same purpose.
What part of the reactor is used to control the speed of the nuclear reaction how does it work?
Boron and/or Cadmium control rods. They are inserted into the core to slow the reaction and withdrawn from the core to speed up the reaction. Both elements have a very high neutron capture crosssection, the more in the core the more excess neutrons they remove from the chain reaction.
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
How is a chain reactor controlled?
Since the continued chain reaction of a nuclear fission reactor depends upon at least one neutron from each fission being absorbed by another fissionable nucleus, the reaction can be controlled by using control rods of material which absorbs neutrons. Cadmium and boron are strong neutron absorbers and are the most common materials used in control rods. A typical neutron absorption reaction in boron is In the operation of a nuclear reactor, fuel assemblies are put into place and then the control rods are slowly lifted until a chain reaction can just be sustained. As the reaction proceeds, the number of uranium-235 nuclei decreases and fission by- products which absorb neutrons build up. To keep the chain reaction going, the control rods must be withdrawn further. At some point, the chain reaction cannot be maintained and the fuel must be replenished
What can be used to absorb neutrons to control the chain reaction during nuclear fission?
Boron is most commonly used, mixed to make an alloy with steel which is used for the control rods. Soluble boron can also be used mixed with the reactor primary water, but this is for more long term reactivity adjustment. Other good neutron absorbers are cadmium and hafnium.
Does the cadmium in the control rod slow down a nuclear reaction by absorbing neutrons?
true
Which is or are used in nuclear reactors to absorb neutrons?
control rods
What are control rods in a reactor core used for?
Control the reaction rate by absorbing neutrons that are generated but not needed. They are typically made of cadmium or boron, elements that have very large neutron capture crosssections (a measurement of the statistical probability of a given nuclear interaction).
How can the rate of reaction be slowed down in a nuclear fission reactor?
By inserting the control rods which absorb neutrons using boron, cadmium, or other material with a large neutron capture crosssection. If the reactor should begin to run out of control the SCRAM system will suddenly insert large amounts of neutron absorbing material, instantly stopping the neutron chain reaction.
How to control nuclear reactions?
With control rods made of Cadmium metal, which absorbs neutrons.
What is the purpose of the cadmium rods in a nuclear fission reactor?
Cadmium is a very strong absorber of neutrons and therefore can be used to control the chain reaction and to shutdown the reactor when required. Boron is also often used for the same purpose.
Which are used in nuclear reactors to absorb neutrons?
boron or cadmium control rods.
What part of the reactor is used to control the speed of the nuclear reaction how does it work?
Boron and/or Cadmium control rods. They are inserted into the core to slow the reaction and withdrawn from the core to speed up the reaction. Both elements have a very high neutron capture crosssection, the more in the core the more excess neutrons they remove from the chain reaction.
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.
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
How a controlled nuclear reactions can be conducted?
we will start with this statement cadmium rods have the property to absorb nutrons now we know that for nuclear reactions it is necessary for the neutrons to strike the nucleus of the atom and thus with the help of cadmium rods we can control the number of neutrons striking the nucleus and we can control our nuclear reactions
How is a fission process regulated through use of adjusting neutrons?
The control rods form a variable means of absorbing excess neutrons, so that the chain reaction is maintained at a steady level. Soluble boron 'poisoning' can also be used , and is used after refuelling when there is excess reactivity, but this can only be changed slowly, the control rods do the minute by minute control.
