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How many neutrons are produced during a typical uranium fission reaction and what is the role of these neutrons in a nuclear chain reaction?
Wiki User
∙ 12y ago
A typical uranium fission event produces 2 to 3 neutrons. These neutrons are moderated (slowed down) and go on to initiate the fission of more uranium. On average, in a controlled reaction that is maintained at normal criticality (KEffective = 1), each fission creates exactly one neutron that is used to produce another fission.
Wiki User
∙ 12y ago
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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
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.
Two particles to start nuclear fission reaction?
Uranium 235 (92U235) and slow Neutrons.
Is energy released from uranium 238 when the atom splits?
1. Energy (heat) 2. Fast neutrons 3. Fission products (atoms of other elements of lower atomic weight, often very radioactive). All three are produced simultaneously, for every fission that occurs.
What is an uncontrolled nuclear fission?
There are both controlled and uncontrolled fission reactions. The reactors in nuclear power plants and submarines make use of a controlled nuclear reaction. Nuclear weapons make use of an uncontrolled reaction.
In a nuclear fission reaction which component both triggers the reaction and is produced by the reaction?
neutrons
Is fusion a chain reaction?
Not exactly, nuclear chain reactions are a series of nuclear fissions initiated by neutrons produced in a preceding fission.
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 does fission produce?
Nuclear fission is nuclear reaction in which nucleus of an atom , usually a heavy element, splits into smaller parts i.e. lighter nuclei . Free neutrons and photons are produced along with release of large amount of energy.
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
Where are Protons and neutrons found in a atom bomb?
Protons and Neutrons in atomb bombs are found in the nuclear fission reaction.
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 uranium atom can be triggered to split when struck by?
The nuclear fission of uranium is a reaction with neutrons.
A Self-sustaining nuclear fission chain reaction is dependent upon the release of what?
Neutrons
Why are neutrons fired at the uranium nuclei?
Under bombardment with thermal neutrons a nuclear fission is produced with the isotopes 235U and 233U; a formidable energy is released after fission.
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.
What particle is needed to begin a nuclear chain reaction?
Neutrons are the important particles of nuclear chain reactions and the reactions depend on them. The neutrons do not really start the fission, reaction, however, because the neutrons come from fission in the fuel.The material in the fuel, typically a mix of 235U and 238U, undergoes fission spontaneously. When a fission event happens, more neutrons, typically two or three, are emitted. These bounce about from atom to atom, until they cause another atom to undergo fission, releasing more neutrons to increase the rate at which atoms undergo fission.But the neutrons needed for the chain reaction are actually produced by the fuel spontaneously, and these are produce in an ongoing manner with or without critical mass. So it is not a particle that starts the chain reaction; it is the act of putting together a critical mass.
