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In a continuous chain reaction at a steady rate, which gives a steady power output from a fission reactor, every fission gives rise to another fission. This happens because in every fission 2 or 3 neutrons are produced, some are absorbed or lost, but if just one is captured by another fissionable nucleus, the chain reaction will continue.

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Nitrogen has an atomic mass of 14 and an atomic number of 7 so the number of neutrons must be

Critical mass depends on what

The bond order is equal to the number of pairs of electrons in a covalent bond

Possible options for spent nuclear fuel rods include

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You can't alter what happens in the fission of the nucleus, and U-235 will produce on average 2.5 neutrons per fission. What you have to do is vary the amount of neutrons being absorbed so that the chain reaction continues at a steady rate, which means essentially that the population of neutrons in the active core remains constant. This is the function of the control rods in steady power operation, or for varying the power or indeed shutting the reactor down completely

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Each fission must produce enough free neutrons to ensure that one of them will be absorbed by another fissionable nucleus and cause a fission in that nucleus, allowing for the fact that some neutrons will be absorbed by the reactor moderator and other materials in the reactor core, including the control rods, and some neutrons will be lost at the core boundaries. Also even when a neutron is absorbed by a fissionable nucleus, such as U-235, there is some probability that it will produce U-236 rather than another fission. So it's a question of a neutron balance, rather than a rate of energy production. By pulling the control rods out the amount of neutron absorber in the core is reduced to the point where the above neutron balance is reached, and then the chain reaction will start.

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A stable nuclear fission reaction will be sustained if every fission produces one additional fission reaction.

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Q: For a fission reaction to fail to be maintained as a chain reaction each fission must produce less than additional fission reaction(s).?
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Related questions

For a sustainable fission reaction each fission must produce exactly additional fission reaction(s).?

A stable nuclear fission reaction will be sustained if every fission produces one additional fission reaction.


Is it a fission or fusion reaction?

Fission and fusion are different nuclear reactions.


Which describes what happens during a chain reaction?

Neutrons released during a fission reaction trigger other fission reactions.


How is a nuclear fission reaction controlled in a nuclear reaction?

Reactions that involve nuclei, called nuclear reactions, result in a tremendous amount of energy. Two types are fission and fusion.


If For a sustainable fission reaction each fission must produce exactly how many additional fission reaction(s).?

To sustain a fission chain reaction, each fission reaction must result in one more fission reaction. And that one should result in one more, and so on.


Are nuclear reactions and nuclear fusions the same thing?

Nuclear fusion is a nuclear reaction, but so is fission. So not all nuclear reactions are fission.


How is a nuclear fission reaction controlled in a nuclear reactor?

Reactions that involve nuclei, called nuclear reactions, result in a tremendous amount of energy. Two types are fission and fusion.


How is a nuclear fission reaction controlled in nuclear reactor?

Reactions that involve nuclei, called nuclear reactions, result in a tremendous amount of energy. Two types are fission and fusion.


How could you increase the rate of fission reactions?

Fission does not respond to changes in temperature and pressure like chemical reactions do. In a nuclear reactor, the fission chain reaction can be sped up by removing rods of cadmium, which absorb neutrons. These are in place to prevent the reaction from occurring too quickly. Remove them, and the chain reaction may proceed out of control.


A fission reaction is similar to a fusion reaction in that both reactions involve?

-- changes to the nuclei of the atoms involved -- the conversion of mass to energy


An ongoing series of fission reactions is called a (n) .?

Fission and fusion reactions are chain reactions but in different ways. In fission reaction a heavy nuclei is bombarded with a slow moving neutron and this nuclei breaks to produce more such neurons along with generation of new elements. These slow moving neutrons are further used to carry out fission of more such nuclei. This is chain reaction. Fusion reaction are a different class of nuclear reaction in which small nuclei fuse together to produce bigger nuclei along with the generation of energy due to mass defect.. In fusion reaction lot of energy is produced and this energy is used to carry out further reaction. Thus both can be called series reaction.


What provides the energy for production of electromagnetic wave in the sun?

Nuclear fission and reaction, intense heat.