Paper 1 · People, Development and Environment
UGC NET June 2023 (21.06.2023) Shift-I
In the enrichment process, the fissionable U-235 content in naturally occurring uranium, which is about 0.7 percent, is increased to about
A3% ✓ Correct
B5%
C10%
D12%
Correct answer: (A) 3% — The enriched content is about 3 to 5 percent, so 3 percent is keyed here and the agency accepted both 3 percent and 5 percent.
Explanation
★The enriched content is about 3 to 5 percent, so 3 percent is keyed here and the agency accepted both 3 percent and 5 percent.
★Natural uranium contains only about 0.7 percent of the fissionable U-235 isotope.
★The rest is mostly U-238, which does not readily undergo fission.
★For use as reactor fuel the U-235 content is raised by enrichment.
★Low-enriched uranium typically has about 3 to 5 percent U-235.
★So the enriched level lies in the 3 to 5 percent range.
★The agency treated both 3 percent and 5 percent as acceptable answers.
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