Quantity of fissionable material (i.e. U-235) in natural uranium is _____________ percent?
Correct answer: A. 0.71
- A. 0.71
- B. 6.31
- C. 99.29
- D. 12.73
Explanation
Natural uranium contains about 99.27% uranium-238 and only about 0.71% uranium-235, the principal naturally occurring fissile isotope. Thus the fissionable fraction is approximately 0.71%.
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