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What make Uranium fission?
Uranium (especialy the fissile isotope) 235U is fissionable by bombardments with thermal neutrons.
Atoms that naturally undergo nuclear fissions are called?
These are called fissile or fissionable. Fissile isotopes undergo fission, producing sufficient neutrons of sufficient power that a chain reaction can happen, if there is enough of the isotope to support it. The mass sufficient to support a chain reaction is called critical. Atoms of fissionable isotopes will undergo fission when a sufficiently energetic neutron collides with them, but the neutrons they emit when they divide are either insufficient in number or insufficient in energy to sustain an chain reaction. There is a third type of material that can undergo fission, called fertile, which is isotopes that can be caused to capture neutrons, changing into fissile or fissionable isotopes, so the fission does not happen to atoms of the fertile material directly, but to the atoms of the isotopes they become.
What fissile material was used for the core of the Ivy King device?
The core of the Ivy King device used Highly Enriched Uranium-235 as the fissile material.
What the similarities and the differences between the reaction in uranium-235 and the reaction in Thorium?
Uranium-235 is a fissile isotope: can react with thermal neutrons (fission) to sustain a chain reaction.Thorium-232 is a fertile material: can absorb neutrons without fission and is transformed in the fissile isotope U-233.
What uranium nucleus is fissile?
The isotopes 233U and 235U are fissile with thermal neutrons and the isotope 238U is fissile with fast neutrons.
Fissionable material that cannot sustain nuclear reaction?
Fissionable material that cannot sustain a nuclear reaction on its own is called fissile material. Examples include uranium-238 and thorium-232. These materials can undergo fission when bombarded with neutrons but require additional enrichment or a moderator to sustain a chain reaction.
Similarties between uranium-235 and plutonium-239 in nuclear reactors?
Uranium 235 and Plutonium 239 are fissile elements, fissionable with thermal neutrons.
What make Uranium fission?
Uranium (especialy the fissile isotope) 235U is fissionable by bombardments with thermal neutrons.
What is required for a chain reaction to start?
For a chain reaction to start, there needs to be a sufficient amount of fissile material, such as uranium-235 or plutonium-239, present in a compact enough form to reach critical mass. Additionally, there must be a neutron source to initiate the reaction by introducing a neutron to the fissile material.
Atoms that naturally undergo nuclear fissions are called?
These are called fissile or fissionable. Fissile isotopes undergo fission, producing sufficient neutrons of sufficient power that a chain reaction can happen, if there is enough of the isotope to support it. The mass sufficient to support a chain reaction is called critical. Atoms of fissionable isotopes will undergo fission when a sufficiently energetic neutron collides with them, but the neutrons they emit when they divide are either insufficient in number or insufficient in energy to sustain an chain reaction. There is a third type of material that can undergo fission, called fertile, which is isotopes that can be caused to capture neutrons, changing into fissile or fissionable isotopes, so the fission does not happen to atoms of the fertile material directly, but to the atoms of the isotopes they become.
What is nuclear breeding?
This means the breeding of fissile material from non-fissile. Thus for example Pu239 results from irradiating U238 which is not fissile. Thorium can also be used to breed fissile uranium.
What is the amount of fissionable material that must be present in order for a nuclear reaction to take place called?
The critical mass. With an amount of U-235 or Pu-239, the smallest critical mass will be a sphere. For a nuclear reactor, it will be the minimum number of fuel assemblies loaded to produce a chain reaction.
What was the nuclear material in the first bomb?
The first bomb that was used on people (Little Boy) used Highly Enriched Uranium as its fissile material. The first tested bomb at the Trinity Test used Plutonium as its fissile material.
What fissile material was used for the core of the Ivy King device?
The core of the Ivy King device used Highly Enriched Uranium-235 as the fissile material.
What is meant by supercritical andhow dose it relate to making a nuclear bomb?
subcritical - a mass or arrangement of fissionable or fissile material unable to sustain a neutron chain reaction. It can provide a fixed amount of neutron multiplication from a neutron source, but after removal of the neutron source the chain reaction rate drops exponentially.critical - a mass or arrangement of fissionable or fissile material capable of sustaining a constant neutron chain reaction. No increase or decrease. (Nuclear reactors operate at critical)supercritical - a mass or arrangement of fissionable or fissile material capable of not only sustaining a neutron chain reaction, but once initiated the chain reaction rate rises exponentially. (Nuclear fission bombs explode when made supercritical)A nuclear fission bomb must have 2 of these states: subcritical (so that it can't explode until desired) and supercritical (so that it explodes with an effective yield). This requires a rapid "assembly" system using conventional explosives to rearrange the fissile material from subcritical to supercritical in about 1ms. A neutron source starts the chain reaction and the explosion completes in about 1 microsecond.
Why cant thorium be used as energy to power up individual homes?
Thorium is not a fissile material. And for fissile materials - is impossible to have a nuclear reactor in each home.
Can all types of uranium be used in making electricity in a reactor?
Uranium-235 and uranium-233 (obtained from thorium-232) are fissile isotopes and used as nuclear fuels. Uranium-238 is fissionable with fast neutrons but the important use is as fertile material (to obtain plutonium-239). Other uranium isotopes are without use.
