What is natural uranium?

Natural Uranium

Natural uranium (NU) refers to refined uranium with the same isotopic ratio as found in nature. It contains 0.7% uranium-235, 99.3% uranium-238, and a trace of uranium-234 by weight. In terms of the amount of radioactivity, approximately 2.2% comes from uranium-235, 48.6% uranium-238, and 49.2% uranium-234.

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Some articles on natural uranium:

Depleted Uranium
... Depleted uranium (DU also referred to in the past as Q-metal, depletalloy or D-38) is uranium with a lower content of the fissile isotope U-235 than natural uranium ... (Natural uranium is about 99.27% U-238, 0.72% U-235—the fissile isotope, and 0.0055% U-234) ... Most depleted uranium arises as a byproduct of the production of enriched uranium for use in nuclear reactors and in the manufacture of nuclear weapons ...
Peak Uranium - Uranium Supply - Breeding
... than it consumes and thus can extend the uranium supply ... It typically turns the dominant isotope in natural uranium, uranium-238, into fissile plutonium-239 ... results in hundredfold increase in the amount of energy to be produced per mass unit of uranium, because U-238, which constitute 99.3% of natural uranium, is not used in conventional reactors ...
Heavy Water Reactor - Purpose of Using Heavy Water - Advantages and Disadvantages
... to the PHWR system, enabling the use of natural uranium as fuel (in the form of ceramic UO2), which means that it can be operated without expensive uranium enrichment facilities ... that a PHWR is not only able to "burn" natural uranium and other fuels, but tends to do so more efficiently as well ... It is also notable that the reduced energy content of natural uranium as compared to enriched uranium necessitates more frequent replacement of fuel this is ...
Heavy Water Reactor - Purpose of Using Heavy Water
... Natural uranium consists of a mixture of various isotopes, primarily 238U and a much smaller amount (about 0.72% by weight) of 235U ... chain reaction, but due to the low natural abundance of 235U, natural uranium cannot achieve criticality by itself ... that permits a sustained chain reaction in the uranium as a whole ...
Natural Uranium
... Natural uranium (NU) refers to refined uranium with the same isotopic ratio as found in nature ... It contains 0.7% uranium-235, 99.3% uranium-238, and a trace of uranium-234 by weight ... of the amount of radioactivity, approximately 2.2% comes from uranium-235, 48.6% uranium-238, and 49.2% uranium-234 ...

Famous quotes containing the word natural:

    When human beings have been fascinated by the contemplation of their own hearts, the more intricate biological pattern of the female has become a model for the artist, the mystic, and the saint. When mankind turns instead to what can be done, altered, built, invented, in the outer world, all natural properties of men, animals, or metals become handicaps to be altered rather than clues to be followed.
    Margaret Mead (1901–1978)