I don't think the term "highly enriched" is accurate given the article's content. The article claimed to have found "enriched uranium" which is U-238 enriched by U-235 at anywhere from 2% on up. At those levels the uranium is useful only for power generation. "Highly Enriched Uranium" refers to U-238 enriched to U-235 at or above 90% - which is weapons grade. It's unclear from the article what level of enrichment was attained, so claiming "highly enriched" (or weapons grade) would appear unsubstantiated.
Since what was found is higher grade than what is needed for producing energy.... (It sometimes helps to read the article.)
Welcome to FR.