GENERAL KNOWLEDGE

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GK

NUCLEAR SCIENCE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Fast breeder nuclear reactors using enriched uranium as fuel may contain upto a maximum of ____ percent of U-235 (i.e. fissile material).
A
15
B
45
C
65
D
85
Explanation: 

Detailed explanation-1: -In order for uranium to be suitable for power production in nuclear plants, it has to be enriched so that it contains at least three percent of U-235.

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: -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.

Detailed explanation-4: -Natural uranium as found in the Earth’s crust is a mixture largely of two isotopes: uranium-238 (U-238), accounting for 99.3% and uranium-235 (U-235) about 0.7%.

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