HEU may refer to:
*
Harbin Engineering University, in Harbin, China
* Highly
enriched uranium
Enriched uranium is a type of uranium in which the percent composition of uranium-235 (written 235U) has been increased through the process of isotope separation. Naturally occurring uranium is composed of three major isotopes: uranium-238 (23 ...
, uranium that is 20% or more U235
*
Hospital Employees' Union, trade union in British Columbia, Canada
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