China lifts Ningde 5 containment dome, entering equipment installation

The 270-tonne outer dome at Ningde Unit 5 clicked into place at 08:02 local time after a 2-hour, 45-minute lift, marking the moment the HPR1000 unit moved out of civil construction and into equipment installation. At the Ningde Nuclear Power Plant in Fujian province, the 45-metre-diameter dome now closes the containment structure around the reactor building, a milestone that matters because it is a construction-readiness checkpoint, not just a heavy-lift spectacle.

China General Nuclear Power Group said the dome was a hemispherical hyperboloid shell assembled from steel plates, angle steel keels, studs and internal supports. A large crawler crane raised the structure to the equivalent height of a 20-storey building before the final set-down. The same day, the inner steel dome was also installed, reinforcing that Ningde 5 is crossing a major threshold in the build sequence rather than simply logging one more lift.

That threshold is central to how a Chinese reactor project advances. Once the containment is enclosed, the site can push harder into major equipment installation inside the nuclear island, then into later systems completion, testing, fuel loading and startup preparation. Ningde 5 had already entered full-scale nuclear-island installation work on April 28, 2026, and the dome placement shows how quickly the project is moving through the next stage. The unit is scheduled to begin operation in 2029.

The timeline at Ningde has been tight and orderly. China’s State Council approved Units 5 and 6 on July 31, 2023. First concrete for the nuclear island of Unit 5 was poured at 10:58 on July 28, 2024. That sequence, approval, first concrete, nuclear-island installation, containment closure, is the familiar rhythm of Chinese reactor construction, and Ningde 5 is following it with little apparent slack.

The reactor sits at Beiwan village, Qinyu Township, Fuding city, where Ningde already runs four 1,018 MWe CPR-1000 units that entered commercial operation between April 2013 and July 2016. Chinese sources have described Ningde as the first nuclear power plant built and put into operation in Fujian Province, which gives the second phase extra regional weight. Phase I cost 51.2 billion RMB and was expected to produce about 300 billion kilowatt-hours annually after completion.

Hualong One’s double containment structure, passive and active safety systems, 177-fuel-assembly core and 60-year design life are built into why this dome matters so much. With the shell now closed, Ningde 5 looks less like a construction site and more like a reactor taking its next, highly visible step toward completion.