Question

Enriched uranium means ________.

• A. Uranium with high concentration of $U-233$
• B. Uranium with high concentration of $U-235$
• C. Uranium with high concentration of $U-238$
• D. Uranium exposed to neutron radiation

Answer 1

The correct option is B Uranium with high concentration of $U-235$

Enriched uranium means Uranium with high concentration of U−235.

Low enriched uranium (LEU) has a lower than 20% concentration of 235U; for instance, in commercial light water reactors (LWR), the most prevalent power reactors in the world, uranium is enriched to 3 to 5% 235U. Fresh LEU used in research reactors is usually enriched 12% to 19.75% U-235, the latter concentration being.

Enriching Uranium. The nuclear fuel used in a nuclear reactor needs to have a higher concentration of the U235 isotope than that which exists in natural uranium ore. U235 when concentrated (or "enriched") is fissionable in light-water reactors (the most common reactor design in the USA).