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


### Answer
The term **highly enriched uranium** is defined in *22 U.S.C. § 6324* as the following:

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

#### Citation:
  - *22 U.S.C. § 6324*
  - Heading: **CHAPTER 72-NUCLEAR PROLIFERATION PREVENTION > SUBCHAPTER II-INTERNATIONAL ATOMIC ENERGY AGENCY**

