Sanao unit 4 starts nuclear-island first concrete
Catch-up: both the event and original announcement date are 10 November 2026.
The story explained
CGN began the first nuclear-island concrete pour for Sanao unit 4 in Zhejiang at 08:28 on 10 November 2026. The milestone marks the start of main construction and full construction of phase two. This catch-up retains the original date rather than treating the publication of this brief as the construction date.
The Hualong One unit belongs to phase two, approved on 19 August 2024. CGN described approximately 8,820 cubic metres of concrete and a planned 60-hour pour. Those are the announced work scope and duration, not confirmation that the pour has finished.
Sanao is planned as six units in three phases, with four approved. At announcement, unit 1 was operating, unit 2 had completed first fuel loading and unit 3 was building structures around its nuclear island. Unit 4’s expected annual output of about 9 billion kWh is a future estimate; no new valve or pump supply contract was identified.
Why it matters
Editorial analysis: First concrete is a major civil-construction milestone; equipment installation and commissioning remain separate stages with their own quality requirements.
Relevant toProject owners, EPCs and flow-control suppliers
What to watch next
Watch subsequent civil milestones, equipment deliveries and installation quality records.
These are research prompts, not announced tenders or confirmed subsequent developments.
中国广核电力股份有限公司
中广核浙江三澳核电项目4号机组主体工程开工
This is an independently written summary and analysis, not an official translation. Project plans and status may change.