Haiyang-3

Background: The AP1000 reactor, explained

Current state

Notes

Commissioning well advanced: cold tests 2026-03-06, hot tests 2026-08-13, both per SPIC announcements corroborated by World Nuclear News and WNA country profile. SPIC targets fuel load and first grid connection within 2026 — ahead of schedule; grid connection may slip into early 2027 but commercial operation 2027 holds.

Milestone log

• 2026-03-06 — Cold functional tests completed successfully on first attempt; foundation laid for hot tests and fuel loading (source)
• 2026-06-16 — Listed as under construction in the WNA world table, grid connection estimated 2027 (source)
• 2026-08-13 — Hot functional tests completed (53 commissioning procedures, 308 test chapters); SPIC aims to load fuel and connect unit to grid within 2026, ahead of the 56-month schedule (source)

The milestone log is append-only: corrections are recorded as new entries, never rewrites. Full history via /api/v1/changes.

NNN coverage

Sources

1. https://world-nuclear.org/information-library/current-and-future-generation/plans-for-new-reactors-worldwide
2. https://pris.iaea.org/pris/
3. https://www.world-nuclear-news.org/articles/haiyang-3-completes-cold-tests
4. https://www.world-nuclear-news.org/articles/hot-tests-completed-at-third-haiyang-unit
5. https://world-nuclear.org/information-library/country-profiles/countries-a-f/china-nuclear-power