Nuclear reactors fuel
Plutonium has been taking a prominence position among the transuranians, due to its fruitful usage in nuclear weapons, as well as in the development of the nuclear energy industry; about 1/4 Kg of plutonium produces ten million kilowatt-hour of heat. Its importance derives essentially from its fission readiness by neutrons.
It is possible to observe plutonium in natural uranium ores, although in residual amounts. Its formation process is very similar to that of neptunium, resulting from the irradiation, with neutrons, of natural uranium.