"Fissile" means "capable of undergoing fission."
A fissile isotope is one that can undergo fission when struck by a neutron, releasing energy and more neutrons that can then cause further fission reactions. This property is essential in nuclear reactors and nuclear weapons. Examples of fissile isotopes include uranium-235 and plutonium-239.
The isotopes 233U and 235U are fissile with thermal neutrons and the isotope 238U is fissile with fast neutrons.
Uranium-235 is the fissile isotope
Depleted Uranium
Uranium 235 is 0.7 percent of natural uranium and is fissile
If an isotope is fissile, it means that it can undergo nuclear fission reactions when bombarded by neutrons. This process releases a large amount of energy and more neutrons that can sustain a chain reaction. Fissile isotopes are commonly used in nuclear reactors and weapons.
In this type of nuclear reactor the fertile isotope thorium-232 is transformed in the fissile isotope uranium-233 and this act as a nuclear fuel.
The fission energy of the fissile isotope uranium-235 is 1,68.10e8 kJ/mol.
Uranium (especialy the fissile isotope) 235U is fissionable by bombardments with thermal neutrons.
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.
U-235 is the fissile isotope that produces the reactor power output in new fuel. During operation some of the U-238 is converted to plutonium which also contributes to the power of the reactor, an increasing amount as the U-235 is used up.
Fuel used in a nuclear reactor is uranium, the active isotope is uranium 235 which is fissile.