Producer
TENEX (JSC Techsnabexport)
Russian state-owned uranium enrichment trading company, wholly owned by Rosatom. Supplied ~27% of US LEU before the August 2024 US import ban. Russia holds ~44% of global uranium enrichment capacity (USEC). Imposed its own export ban on US-bound LEU in November 2024.
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Inputs supplied
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Goods downstream
2
Facilities
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Stories
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2 inputs TENEX (JSC Techsnabexport) supplies
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Where they make it
2 facilities
AECC Angarsk Electrolytic Chemical Combine →
RUIrkutsk Oblast · manufacturing
One of Russia's major uranium enrichment facilities; part of Rosatom's TENEX supply chain; subject to US import restrictions since August 2024; Russia holds ~44% of global enrichment capacity
TENEX/Rosatom -- Seversk, Siberia (Stable Isotope Production) →
RUSeversk (formerly Tomsk-7), Tomsk Oblast, Siberia, Russia · nuclear_facility
TENEX stable isotope production at Seversk -- a former closed nuclear city (ZATO). Uses gas centrifuge technology adapted from uranium enrichment to separate 13C-labeled carbon monoxide. Russia is the world's dominant C-13 producer; Rosatom's uranium enrichment infrastructure at multiple Siberian sites (Seversk, Zelenogorsk, Angarsk) underpins Russia's commercial stable isotope dominance. Under sanctions pressure post-February 2022.
What else they do
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Uranium Enrichment Services & LEU Trading
85%Stable Isotope Production & Export
10%High-Assay LEU (HALEU) — Emerging
5%
Intelligence
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Did you know2023
Russia's uranium enrichment centrifuge infrastructure also produces Carbon-13 (C-13) and other stable isotopes as a commercial service — the same separation physics that enriches U-235 from U-238 also separates lighter isotopes from heavier ones. C-13 is the non-radioactive carbon isotope used in the 13C-urea breath test, the gold-standard non-invasive diagnostic for Helicobacter pylori (the bacterium causing stomach ulcers and linked to gastric cancer), and in pharmaceutical metabolic studies. A Russian state nuclear enrichment company is thus embedded in the global medical diagnostic supply chain — the same entity whose uranium enrichment is now banned from the US also supplies the isotope in H. pylori tests used by gastroenterologists worldwide.
JSC Techsnabexport (TENEX) ↗Capacity2023
Russia was the primary global source of High-Assay Low-Enriched Uranium (HALEU, 5-20% U-235) — the fuel required by most next-generation advanced reactor designs (TerraPower Natrium, X-energy Xe-100, Kairos Power). The 2024 US import ban cut off HALEU supply from Russia at the same time advanced reactor developers were hoping to begin fuel procurement. The US currently has only one authorized HALEU production facility (Centrus Energy, Piketon Ohio) operating at pilot scale (~100 kg/year), creating a critical gap between advanced reactor development timelines and domestic HALEU availability. The US advanced nuclear energy buildout faces a fueling challenge structurally similar to the solar polysilicon supply chain problem — domestic development outpacing domestically available specialty inputs.
World Nuclear Association ↗Origin2023
Russia's Rosatom/TENEX complex controls approximately 44% of global uranium enrichment capacity through its centrifuge enrichment plants at Angarsk, Zelenogorsk, Novouralsk, and Seversk. The US relied on TENEX for approximately 27% of its LEU supply until the US imposed an import ban in August 2024 (followed by Russia's counter-ban in November 2024). Replacing Russian enrichment capacity requires significant investment: Urenco (UK/Germany/Netherlands), Orano (France), and Centrus Energy (US) together hold the remaining enrichment capacity, but cannot fully substitute Russian SWU in the near term. Nuclear utilities are facing multi-year fuel supply uncertainty as they transition to non-Russian enrichment sources.
JSC Techsnabexport (TENEX) ↗