### Question
What does highly enriched uranium mean?


### Answer
**Highly enriched uranium** has the following meaning in *42 U.S.C. § 2160d*:

> uranium enriched to include concentration of U–235 above 20 percent

#### Citation:
  - *42 U.S.C. § 2160d*
  - Heading: **CHAPTER 23-DEVELOPMENT AND CONTROL OF ATOMIC ENERGY > Division A-Atomic Energy > SUBCHAPTER X-INTERNATIONAL ACTIVITIES**

