### Question
How is the "highly enriched uranium" defined?


### Answer
The term **highly enriched uranium** is defined in *42 U.S.C. § 2160d* as follows -

> uranium enriched to 20 percent or more in the isotope U–235

#### Citation:
  - *42 U.S.C. § 2160d*
  - Heading: **CHAPTER 22-INDIAN HOSPITALS AND HEALTH FACILITIES > Division A-Atomic Energy > SUBCHAPTER X-INTERNATIONAL ACTIVITIES**

