GK
NUCLEAR SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Detailed explanation-1: -The heat energy released, by the controlled nuclear reaction within the nuclear reactor, can be harnessed to produce electricity. Commercially, the U235 isotope is enriched to 3 to 5% (from the natural state of 0.7%) and is then further processed to create nuclear fuel.
Detailed explanation-2: -Natural Uranium – contains a 238U concentration of 99.27 percent, 235U concentration of 0.711 percent and very little 234U. Low Enriched Uranium – contains a 235U concentration between 0.711 percent and 20 percent.
Detailed explanation-3: -Natural uranium consists primarily of two isotopes: 99.3% is 238U and 0.7% is 235U. The fission process, by which heat energy is released in a nuclear reactor, takes place mainly with 235U. As most nuclear power plants require fuel with a 235U concentration of 3–5%, the proportion of the 235U isotope must be increased.
Detailed explanation-4: -In conventional uranic fuels, U235 is the dominant source of fissions. Its natural abundance of 0.7% is enhanced by enrichment to values typically in the range 3–5% for commercial reactor use.