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How does a chain reaction involving 235u sustain itself?

How does a chain reaction involving 235u sustain itself?

How does a chain reaction involving 235 U sustain itself? A critical mass of a fissionable material is the amount needed to provide a high enough internal neutron flux to sustain the chain reaction (production of enough neutrons to cause the continuous fission of further material).

How is a nuclear chain reaction self sustaining?

A fission chain reaction is self-sustaining when the number of neutrons released in a given time equals or exceeds the number of neutrons lost by absorption in nonfissionable material or by escape from the system.

How the strong nuclear force affects the composition of a nucleus?

The strong nuclear force pulls together protons and neutrons in the nucleus. At very small distances only, such as those inside the nucleus, this strong force overcomes the electromagnetic force, and prevents the electrical repulsion of protons from blowing the nucleus apart.

What characteristic of fission makes a chain reaction possible?

The emission of several neutrons in the fission process leads to the possibility of a chain reaction if at least one of the fission neutrons induces fission in another fissile nucleus, which in turn fissions and emits neutrons to continue the chain.

What is a chain reaction give an example?

chain reaction, self-sustaining reaction that, once started, continues without further outside influence. A line of dominoes falling after the first one has been pushed is an example of a mechanical chain reaction; a pile of wood burning after it has been kindled is an example of a chemical chain reaction.

What is this type of chain reaction called?

So-called branching chain reactions are a form of chain reaction in which the number of chain carriers increases in each propagation. As a result the reaction accelerates very rapidly, sometimes being completed in less than 1/1,000th of a second. This condition sometimes is referred to as a chemical explosion.

What is a chain reaction and what causes it?

A chain reaction refers to a process in which neutrons released in fission produce an additional fission in at least one further nucleus. This nucleus in turn produces neutrons, and the process repeats. If each neutron releases two more neutrons, then the number of fissions doubles each generation.

What is the formula of strong nuclear force?

−H*e−d/d0/d² The value of d0 can be determined from the mass of the particles, the π mesons, which carries the nuclear force.

How does a nucleus stay together?

Inside the nucleus, the attractive strong nuclear force between protons outweighs the repulsive electromagnetic force and keeps the nucleus stable. Outside the nucleus, the electromagnetic force is stronger and protons repel each other.

What are the characteristics of chain reaction?

A chain reaction is a sequence of reactions where a reactive product or by-product causes additional reactions to take place. In a chain reaction, positive feedback leads to a self-amplifying chain of events.

How can a chain reaction be controlled quizlet?

Terms in this set (17)

  1. Chain Reaction controlled by. Materials that absorb or capture neutrons are used in the reactor.
  2. Control Rods.
  3. Control Rods made of.
  4. Withdrawing the Control Rods.
  5. If negative reactivity in the core decreases.
  6. Inserting the Control Rods.
  7. Boron.
  8. Boron.

What is a chain reaction group of answer choices?

A chain reaction refers to a process in which neutrons released in fission produce an additional fission in at least one further nucleus. This nucleus in turn produces neutrons, and the process repeats. The process may be controlled (nuclear power) or uncontrolled (nuclear weapons).

Which is characteristic of fission makes a chain reaction?

“Cross-section” means the likelihood of another nucleus absorbing the neutron. Think of it like an area around the nucleus where if the neutron enters that area it will be absorbed, the bigger the area the greater chance the neutron will enter it and be

How is fissile material used in a chain reaction?

By definition, fissile material can sustain a chain reaction with neutrons of thermal energy. The predominant neutron energy may be typified by either slow neutrons (i.e., a thermal system) or fast neutrons. Fissile material can be used to fuel thermal-neutron reactors, fast-neutron reactors and nuclear explosives.

Which is a characteristic of a fissile material?

In nuclear engineering, fissile material is material capable of sustaining a nuclear fission chain reaction. By definition, fissile material can sustain a chain reaction with neutrons of thermal energy. The predominant neutron energy may be typified by either slow neutrons (i.e., a thermal system) or fast neutrons.

How are fissile isotopes different from fissionable isotopes?

Fissile vs fissionable. Under this definition, the only nuclides that are fissionable but not fissile are those nuclides that can be made to undergo nuclear fission but produce insufficient neutrons, in either energy or number, to sustain a nuclear chain reaction. As such, while all fissile isotopes are fissionable,…