Enrichment of uranium is done to increase the concentration of ______________ in the natural uranium?
Correct answer: C. U-235
- A. U-238
- B. U-233
- C. U-235
- D. Pu-239
Explanation
Natural uranium contains mostly U-238 and only about 0.7% U-235, so enrichment increases the concentration of the fissile isotope U-235. U-233 and Pu-239 are not the isotope being enriched in ordinary natural-uranium enrichment.
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