Typically 3% uranium-235, 97% uranium-238.
to make space instruments
1. Uranium must be refined to obtain "nuclear grade" uranium. 2. The enrichment in the isotope 235U depends on the type of the nuclear reactor; some reactors (as CANDU) work with natural uranium.
Uranium 235 is the most important isotope of uranium; it is a fissionable isotope used in HWR, PWR, BWR, research reactors and other types of reactors. But it is rare, only 0.72% of natural Uranium is this isotope.The more plentiful Uranium 238 isotope is only fertile not fissionable; it can only be used in fast reactors to breed Plutonium, which is fissionable. Isotopes of plutonium 239Pu and 241Pu are highly fissionable and importants for nuclear fuels.
A nuclear reactor is a plant which deliver electricity and (or) heat.The function principle is the release of energy from nuclear fission of fissile materials as the isotope uranium-235.
All the isotopes of uranium contains 92 protons and electrons but a different number of neutrons.
235U is a fissionable isotope and 238U is a fertile isotope; these isotopes are extremely important in the production of nuclear energy. Also uranium is used by the United States, United Kingdom and Russia to threaten with nuclear bombs the other countries, without nuclear weapons.
Uranium 235
A nuclear reactor is a plant which deliver electricity and (or) heat.The function principle is the release of energy from nuclear fission of fissile materials as the isotope uranium-235.
1. Uranium must be refined to obtain "nuclear grade" uranium. 2. The enrichment in the isotope 235U depends on the type of the nuclear reactor; some reactors (as CANDU) work with natural uranium.
Fuel used in a nuclear reactor is uranium, the active isotope is uranium 235 which is fissile.
The most common uranium isotope found in nature is Uranium-238. This particular isotope is mostly used in nuclear weapons and as the fuel supply for nuclear power.
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Uranium isotope U-235
The isotope uranium-235 (or uranium-233) under nuclear fission emit the energy of fission. This energy is transformed in heat and electricity.
Uranium is enriched in the isotope uranium-235, producing uranium-238 as waste.
Uranium 235 is the most important isotope of uranium; it is a fissionable isotope used in HWR, PWR, BWR, research reactors and other types of reactors. But it is rare, only 0.72% of natural Uranium is this isotope.The more plentiful Uranium 238 isotope is only fertile not fissionable; it can only be used in fast reactors to breed Plutonium, which is fissionable. Isotopes of plutonium 239Pu and 241Pu are highly fissionable and importants for nuclear fuels.
Pure Uranium is radioactive; thus harmful. Inside a nuclear reactor, atoms get split. When the Uranium atom is split, it releases a huge amount of energy. This energy is called nuclear energy. Also the normal Uranium is not used in reactors. The Uranium that is used is enhanced; it is an isotope of Uranium. Uranium-237 and Uranium-238 are used in nuclear reactors. I hope this answer was useful for you.
The question should not be, what element, but what isotope. Several easily fissible isotopes are used, such as Uranium-235. But note that the element Uranium as such is not usable - only that specific isotope.