Enriched uranium may contain fissionable contents of the order of

A. 1-99%

B. 1-25%

C. 1-50%

D. 1-75%

Answer: Option A

Solution(By Examveda Team)

Natural uranium is 99.284% 238U isotope, with 235U only constituting about 0.711% of its mass. 235U is the only nuclide existing in nature (in any appreciable amount) that is fissile with thermal neutrons.