The enrichment (isotope separation) plant of Rosatom's Siberian Chemical Combine in Seversk, listed by WISE at a nominal 3 million SWU a year. In December 2025 Rosatom launched the first block of generation 9+ centrifuges there, the third of its four enrichment sites to modernize, with further blocks due to be commissioned through 2027.
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Current state
| Status | Operating |
| Country | Russia |
| Location | Seversk, Tomsk region |
| Operator | JSC Siberian Chemical Combine, TVEL / Rosatom |
| Ownership | Rosatom (Russian state corporation) via its Fuel Division (TVEL). |
| Facility type | Enrichment plant |
| Technology | Gas centrifuge |
| Products | LEU |
| Capacity (tSWU/yr) | 3,000 |
Notes
Capacity 3,000 tSWU/yr is WISE's nominal (dated) figure; modernization replaces centrifuges and may not change nameplate capacity, so no target capacity is given; 2027 is the modernization completion target. WNA (Sept 2026, from Nuclear Fuel Report 2025) gives Rosatom's combined capacity across all four sites as 29,133 tSWU/yr in 2025 (about 43% of world capacity), so WISE's dated per-plant figures understate the current total. Rosatom does not publish per-site capacity.
Timeline
- 2017-10-16 — SCC completed dismantling two blocks of fifth-generation centrifuges, leaving sixth- to eighth-generation machines installed. (source)
- 2025-12-02 — Rosatom launched the first block of generation 9+ centrifuges at the Seversk isotope separation plant, with further commissioning scheduled for 2025-2027. (source)
The timeline is append-only: corrections are added as new entries. Stated targets appear in the current-state table, never as milestones.
NNN coverage
About Rosatom
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See all 29 facilities in the Uranium Enrichment & HALEU Tracker →
Sources
- Rosatom starts modernization of its third uranium enrichment plant — Rosatom (Atommedia) (primary), checked 2026-10-11
- Rosatom begins deployment of new-generation centrifuges at Seversk — International Panel on Fissile Materials, checked 2026-10-11
- Current Issues: Operating Uranium Conversion/Enrichment and Nuclear Fuel Plants - Russia — WISE Uranium Project, checked 2026-10-11
- Uranium Enrichment Facilities (updated 2 May 2026) — WISE Uranium Project, checked 2026-10-11
- Uranium Enrichment (updated 29 Sep 2026) — World Nuclear Association, checked 2026-10-11