Uranium is found in nature, containing ).7 percent of uranium-235, 99.3 percent of uranium-238, and a trace of uranium-234.
Uranium containing 0.711 per cent by weight of uranium 235 and no other isotope of uranium except uranium 238 and trace quantities of uranium 234.
Uranium whose constituent isotopes have an isotopic abundance equivalent to that found in nature. The naturally-occurring isotopic abundance for 235U is approximately 0.711% and for 238U it is approximately 99.289%. Reference: 10CFR71. Related to depleted uranium. Related to enriched uranium.
Uranium containing 0.71 percent uranium 235.
Natural uranium is a mixture of uranium-238 (99.27%), uranium-235 (0.72%) and a very low percentage of uranium-234 (0.0056%).
In nature uranium consists predominantly of the isotope U-238 (approx. 99.3%), with the fissile isotope U-235 comprising only 0.711%.
Uranium with an isotopic composition as found in nature, containing 99.3% U-238, 0.7% U-235 and a trace of U-234. Can be used as fuel in heavy water-moderated reactors.
Natural uranium (NU) refers to refined uranium with the same isotopic ratios 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.
