Current state
| Status | Commissioning |
| Design | ACP100 (Linglong One) (PWR, SMR) |
| Net capacity | 125 MWe |
| Country | China |
| Vendor | CNNC |
| Owner / operator | CNNC Hainan Nuclear Power |
| Construction start | 2021-07-13 |
| Original COD target | 2026 |
| Current COD estimate | 2027 |
| Schedule slippage | +1 years |
Notes
World's first land-based commercial SMR. H1 2026 commercial-operation target has passed with no fuel loading reported; hot functional testing underway since March 2026; trade press reports COD now targeted for early 2027, but no primary CNNC/NNSA schedule update found. Neighboring Changjiang-3 (Hualong One, not the SMR) reached criticality 2026-07-10 and grid connection 2026-08-01 — do not confuse with Linglong One milestones.
Milestone log
- 2021-07-13 — First concrete — world's first onshore commercial SMR construction start (source)
- 2025-10-15 — Cold functional testing completed (source)
- 2025-12-23 — Non-nuclear turbine test run passed on first attempt (source)
- 2026-03-10 — Hot functional testing underway, per CNNC official at Two Sessions; progressing toward fuel loading (source)
- 2026-09-08 — WNN confirms Linglong One still undergoing pre-commissioning tests — no fuel load, criticality or grid connection yet; H1 2026 COD target missed (source)
The milestone log is append-only: corrections are recorded as new entries, never rewrites. Full history via /api/v1/changes.
NNN coverage
At Changjiang Nuclear Power Plant
Sources
- https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide
- https://www.nucnet.org/news/china-s-linglong-1-set-to-become-first-land-based-smr-to-begin-operation-12-5-2025
- https://pris.iaea.org/pris/
- https://www.iea.org/reports/global-energy-review-2026/technology-nuclear
- https://news.cgtn.com/news/2026-03-10/VHJhbnNjcmlwdDg5NTMw/index.html
- https://world-nuclear-news.org/articles/key-commissioning-tests-completed-at-changjiang-4