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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.
What else can I help you with?
How do control rods speed up or slow down fission?
Control rods absorb neutrons, which regulate the nuclear fission process in a reactor. By inserting control rods, more neutrons are absorbed, slowing down the fission reactions. By withdrawing control rods, fewer neutrons are absorbed, allowing more fission reactions to occur and speeding up the process.
The process which describes the splitting of a large unstable atom into two intermediate size atoms and extra neutrons is called?
The process which describes the splitting of a large unstable atom into two intermediate size atoms and extra neutrons is called nuclear fission. Nuclear fission is a nuclear reaction or a radioactive decay process.
Which is are used in nuclear reactors to absorb neutrons?
Control rods, such as boron or cadmium, are used in nuclear reactors to absorb neutrons and regulate the nuclear fission process. By adjusting the position of these control rods, the rate of reactions can be controlled to maintain the desired power levels within the reactor.
What is it called when neutrons released from a fission event cause other fission events in a continued self sustaining cascade?
This process is called a nuclear chain reaction. Neutrons released from one fission event trigger other fission events, creating a self-sustaining reaction that releases energy and more neutrons, continuing the chain reaction.
When an atom of uranium 235 is bombarded with neutrons it splits into smaller nuclei and produces a great amount of energy This nuclear process is called?
This nuclear process is called nuclear fission. During nuclear fission, the uranium-235 atom absorbs a neutron, becomes unstable, and splits into two smaller nuclei (fission fragments) and releases energy and more neutrons.
How do control rods in a nuclear reactor regulate the rate of nuclear fission?
Control rods in a nuclear reactor regulate the rate of nuclear fission by absorbing neutrons, which are needed to sustain the fission process. By adjusting the position of the control rods, operators can control the number of neutrons available to cause fission reactions, thus regulating the overall power output of the reactor.
The rate at which reactions occur in a nuclear reactor is regulated by?
The rate of reactions in a nuclear reactor is regulated by control rods made of materials like boron or cadmium, which absorb neutrons and help control the nuclear fission process. By adjusting the position of these control rods, operators can control the rate of reactions and the amount of heat produced in the reactor.
The process in which each split atom gives up neutrons?
The act of an atom splitting is called nuclear fission. In nuclear fission where we see neutrons emerge with fission fragments, and we then see those neutrons initiate other fission reactions is called a nuclear fission chain reaction.
How do control rods speed up or slow down fission?
Control rods absorb neutrons, which regulate the nuclear fission process in a reactor. By inserting control rods, more neutrons are absorbed, slowing down the fission reactions. By withdrawing control rods, fewer neutrons are absorbed, allowing more fission reactions to occur and speeding up the process.
The process which describes the splitting of a large unstable atom into two intermediate size atoms and extra neutrons is called?
The process which describes the splitting of a large unstable atom into two intermediate size atoms and extra neutrons is called nuclear fission. Nuclear fission is a nuclear reaction or a radioactive decay process.
Do they have to heat the uranium rods to start the fission process or it is just about standing them next to one another in the reactor core?
In a nuclear reactor, the uranium rods do not need to be heated to start the fission process. Fission occurs when neutrons collide with uranium atoms, splitting them and releasing energy. The criticality of the reactor core is maintained by adjusting the concentration of uranium and control rods, which absorb excess neutrons to control the reaction.
A nuclear fission process in which neutrons produced by fission trigger more fissions?
nuclear chain reactionNote: there are also chemical chain reactions (e.g. polymerization), of course they involve no neutrons
What process takes place when uranium -235 splits into two smaller nuclei plus neutrons?
The process is called nuclear fission. When uranium-235 splits, it releases a large amount of energy along with smaller nuclei and multiple neutrons. This chain reaction continues as these neutrons can cause additional uranium-235 atoms to undergo fission.
Is moderation of neutrons always used to slow nuclear fission?
No, moderation of neutrons is not always used to slow nuclear fission. In some types of nuclear reactors, such as fast breeder reactors, fast neutrons are intentionally not moderated to slow down the fission process. These reactors operate using fast neutrons to sustain a chain reaction. However, in most commercial nuclear reactors, moderation of neutrons is employed to slow down the fission process and maintain a controlled chain reaction.
The process in which each split atom gives up neutrons is called?
The splitting of atoms and the release of neutrons describes nuclear fission.
Is a chain reaction possible in a substance that emit no neutrons when it fission?
No, a chain reaction is not possible in a substance that emits no neutrons when it undergoes fission. Neutrons are required to sustain a chain reaction by triggering the fission of other atoms in the substance. Without neutron production, the fission process cannot continue to release energy and sustain the chain reaction.
What is the processes of fission?
Energy is released when the the mass of the nucleus of an atom is reduced by the release of neutrons and gamma photons during the process of nuclear fission.
