Consider the following statements regarding “uranium enrichment”: 1. Weapon-grade uranium is considered enriched above 90 percent U-235. 2. Highly enriched uranium (HEU) is anything enriched above 20 percent U-235. Which of the statements given above is/are correct? |ForumIAS

[A] 1 only

[B] 2 only

[C] Both 1 and 2

[D] Neither 1 nor 2

Answer: C

Notes:

Explanation: Weapon-grade uranium is commonly considered to have been enriched above 90% U-235.

Uranium enrichment is a process to create an effective nuclear fuel out of mined uranium by increasing the percentage of uranium-235 (U-235).
Uranium found in nature contains only 0.7% of the chain-reacting isotope U-235. Naturally, 99.27% of Uranium exists in the form of U-238 while rest in other isotopes such as: U-235 (0.72%), and U-234 (0.006%) etc.
Most nuclear reactors that produce electricity only require fuel that is enriched to between 3-5% U-235. Highly enriched uranium (HEU) is anything enriched above 20% U-235.

Source: FORUMIAS