During 1946–1952, Dictyonema argillite was mined and used for uranium oxide production.[2][4][5][6][7]
In 1982, the plant began the production of reactor-grade enriched uranium (2–4.4% 235U) in form of UO2. Uranium production at Sillamäe continued to supply nuclear materials for the Soviet nuclear power plants and weapon facilities until 1989. In the years of 1950–1989, the plant produced about 98,681 tonnes of uranium (mostly as U3O8) and 1354.7 tonnes of enriched uranium.[9]
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