Current state
| Status | Under construction |
| Design | VVER-1200 (PWR) |
| Net capacity | 1,110 MWe |
| Country | China |
| Vendor | Rosatom |
| Owner / operator | CNNC (JNPC) |
| Construction start | 2022 |
| Original COD target | — |
| Current COD estimate | 2027 |
| Schedule slippage | — |
Notes
Verified 2026-09-28: RPV installed September 2024 per WNN/CNNC/Rosatom; cold tests Aug 2026 (WNN/CNNC, covered by NNN newsroom Aug 10). Sister unit Tianwan-7 in fuel loading (Aug 2026, date conflict noted on unit-7 file); unit 8 grid connection 2027 per WNA table.
Milestone log
- 2026-06-16 — Listed as under construction in the WNA world table, grid connection estimated 2027 (source)
- 2024-09-02 — Reactor pressure vessel (332 t) installed at Tianwan-8 (source)
- 2026-08-05 — Cold functional tests completed (CNNC via WNN); unit moves from installation into commissioning (source)
The milestone log is append-only: corrections are recorded as new entries, never rewrites. Full history via /api/v1/changes.
NNN coverage
About Tianwan-8
On the VVER-1200 design
- Akkuyu 1 completes primary-circuit hydraulic tests 2026-10-10
- The 6 nuclear stories that mattered this week 2026-09-19
- Vietnam picks Rosatom for Ninh Thuan 1, Korea closes on Ninh Thuan 2 2026-09-13
- The 8 nuclear stories that mattered this week 2026-09-05
- Rosatom signs EPC contract for Kazakhstan's first nuclear plant 2026-09-04
- The 6 nuclear stories that mattered this week 2026-08-29
Sources
- https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide
- https://pris.iaea.org/pris/
- https://www.world-nuclear-news.org/articles/reactor-vessel-installed-at-tianwan-8
- https://www.world-nuclear-news.org/articles/tianwan-8-completes-cold-functional-tests