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How can a sample of uranium-235 that has critical mass be induced to react in a controlled nuclear fission reaction?
To induce a controlled nuclear fission reaction in a sample of uranium-235 with critical mass, the sample needs to be bombarded with neutrons. This process, known as neutron bombardment, triggers the splitting of uranium-235 atoms, releasing energy and more neutrons to sustain the chain reaction. By controlling the rate of neutron bombardment, scientists can regulate the fission process and harness the released energy for various applications, such as generating electricity in nuclear power plants.
How is a chain reaction in a nuclear reactor controlled?
A chain reaction in a nuclear reactor is controlled by inserting control rods made of materials like boron or cadmium into the reactor core. These control rods absorb neutrons and help regulate the rate of the chain reaction by adjusting the number of neutrons available to continue the reaction. By raising or lowering the control rods, operators can fine-tune the reaction to maintain desired power levels.
What is necessary sustain a nuclear chain reaction?
In a chain reaction, neutrons released during the splitting of an initial nucleus trigger a series of nuclear fissions.
What does a fission reaction require to be sustainable?
A sustained fission reaction requires a critical mass of fissile material, such as uranium-235 or plutonium-239, and a moderator to slow down the emitted neutrons, like water or graphite. Additionally, a fission chain reaction needs a controlled environment in which the reaction can be regulated to ensure it doesn't run away uncontrollably.
Why must neutrons in a chain reaction be controlled?
Neutrons in a chain reaction must be controlled to prevent the reaction from reaching a critical mass and becoming uncontrollable. By controlling the rate of neutron production and absorption, engineers can manage the reaction to ensure it remains stable and does not lead to a runaway nuclear event.
How can a sample of uranium-235 that has critical mass be induced to react in a controlled nuclear fission reaction?
To induce a controlled nuclear fission reaction in a sample of uranium-235 with critical mass, the sample needs to be bombarded with neutrons. This process, known as neutron bombardment, triggers the splitting of uranium-235 atoms, releasing energy and more neutrons to sustain the chain reaction. By controlling the rate of neutron bombardment, scientists can regulate the fission process and harness the released energy for various applications, such as generating electricity in nuclear power plants.
How do you control a chain reaction?
A chain reaction can be controlled by regulating the rate at which neutrons are produced and absorbed in the reaction. This can be achieved by controlling the amount of fuel and moderator, as well as using control rods to absorb excess neutrons and adjust the reactor's power level. Additionally, designing the reactor with safety features, such as automatic shutdown systems, can help prevent the chain reaction from getting out of control.
How is a chain reaction in a nuclear reactor controlled?
A chain reaction in a nuclear reactor is controlled by inserting control rods made of materials like boron or cadmium into the reactor core. These control rods absorb neutrons and help regulate the rate of the chain reaction by adjusting the number of neutrons available to continue the reaction. By raising or lowering the control rods, operators can fine-tune the reaction to maintain desired power levels.
What is necessary sustain a nuclear chain reaction?
In a chain reaction, neutrons released during the splitting of an initial nucleus trigger a series of nuclear fissions.
What is the amount of fissionable material required to continue a reaction at a constant rate?
The amount of fissionable material required to sustain a nuclear reaction at a constant rate is determined by the material's critical mass. The critical mass is the minimum amount of fissionable material needed to sustain a chain reaction, and it varies depending on the material and the reactor design. By controlling factors such as neutron moderation and absorption, reactor operators can adjust the critical mass to maintain a steady reaction rate.
What does a fission reaction require to be sustainable?
A sustained fission reaction requires a critical mass of fissile material, such as uranium-235 or plutonium-239, and a moderator to slow down the emitted neutrons, like water or graphite. Additionally, a fission chain reaction needs a controlled environment in which the reaction can be regulated to ensure it doesn't run away uncontrollably.
What does neutron moderation counteract?
the minimal chance that newly formed neutrons of a fussion reaction are absorbed by moore atoms
How is fission inside a powerplant controlled?
Fission in a power plant is controlled by using control rods made of materials like boron or cadmium that absorb neutrons, slowing down or stopping the chain reaction. By adjusting the position of these control rods, operators can regulate the rate of fission, maintaining a stable and controlled nuclear reaction to generate heat for electricity production.
Why must neutrons in a chain reaction be controlled?
Neutrons in a chain reaction must be controlled to prevent the reaction from reaching a critical mass and becoming uncontrollable. By controlling the rate of neutron production and absorption, engineers can manage the reaction to ensure it remains stable and does not lead to a runaway nuclear event.
Neutron moderation is used to counteract what?
the minimal chance that newly formed neutrons of a fission reaction are absorbed by more atoms. (apex)
How does a chain reaction start in chemistry?
In a nuclear fissionchain reaction, neutrons are absorbed by large nuclei, and they undergo fission, part of the fission products are more neutrons, which are absorbed by more nuclei, which ... blah, blah, blah.
Does a chain reaction involve fission?
Yes, a chain reaction is all fission, just out-of-control fission. Usually, fission creates 2 neutrons per decay, but it is controlled by the fact that lots of neutrons get absorbed by U-238, which doesn't fission, unlike U-235, which does, and by the control rods, which also absorb lots of neutrons. But if these fail to contain the outbreak of neutrons, and the fail safes (which usually just drop the control rods totally into the reactor, stopping any chain reaction) fail, then an exponentially accelerating chain fission reaction can start, and once it starts, it's pretty much impossible to stop.
