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TeachMeFinance.com - explain Natural uranium Natural uranium The term 'Natural uranium' as it applies to the area of nuclear science can be defined as ' Uranium containing the relative concentrations of isotopes found in nature (0.7 percent uranium-235, 99.3 percent uranium-238, and a trace amount of uranium-234 by mass). In terms of radioactivity, however, natural uranium contains approximately 2.2 percent uranium-235, 48.6 percent uranium-238, and 49.2 percent uranium-234. Natural uranium can be used as fuel in nuclear reactors. '. The term 'Natural uranium' as it applies to the area of energy can be defined as ' Uranium with the U-235 isotope present at a concentration of 0.711 percent (by weight), that is, uranium with its isotopic content exactly as it is found in nature'. Previous 5 Terms: Natural period of vibration (T) Natural reservoir pressure Natural Resources Conservation Service (NRCS) natural selection Natural streamflow Next 5 Terms: Naturalness Nautical Dawn Nautical Dusk nautical mile Nautical Twilight About the author Mark McCracken Author: Mark McCracken is a corporate trainer and author living in Higashi Osaka, Japan. He is the author of thousands of online articles as well as the Business English textbook, "25 Business Skills in English". Copyright © 2005-2011 by Mark McCracken, All Rights Reserved. TeachMeFinance.com is an informational website, and should not be used as a substitute for professional medical, legal or financial advice. Information presented at TeachMeFinance.com is provided on an "AS-IS" basis. Please read the disclaimer for details.