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


### Answer
The definition of **highly enriched uranium** is as follows in *42 U.S.C. § 2297h*:

> uranium enriched to 20 percent or more of the uranium-235 isotope

#### Citation:
  - *42 U.S.C. § 2297h*
  - Heading: **CHAPTER 23-DEVELOPMENT AND CONTROL OF ATOMIC ENERGY > Division B-United States Enrichment Corporation > SUBCHAPTER VIII-UNITED STATES ENRICHMENT CORPORATION PRIVATIZATION**

