### Question
What is the definition of highly enriched uranium?


### Answer
The definition of **highly enriched uranium** is as follows 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**

