Sanmen 3 is a 1,251MW nuclear reactor planned in Zhejiang, China. According to GlobalData, who tracks and profiles over 170,000 power plants worldwide, the nuclear reactor is currently at the under construction stage. The construction on the reactor is likely to commence in Jun, 2022. The plant proponent is expected to achieve the first power from the reactor in 2027 and is planned for commissioning in the same year. Buy the profile here.


Sanmen 3 is a Generation III+ nuclear reactor.

The 1,251MW reactor is currently owned and will be operated by China National Nuclear. The company has a stake of 100%.

Sanmen 3 is a type of PWR reactor. It will feature 157 fuel assemblies in the core of reactor, the place where fission occurs and energy is released. The project cost is expected to be around $2,877.8m.

The reactor consists of 1 steam turbine.

The material used for the construction of the vessel will be Carbon Steel.

Development status

The reactor construction is expected to commence from Jun, 2022. Subsequent to that it will enter commercial operation by 2027.

Contractors Involved

The reactor system is likely to be supplied by Westinghouse Electric. The civil works will be carried out by China Nuclear Industry 22nd Construction.

For more details on Sanmen 3, buy the profile here.


GlobalData, the leading provider of industry intelligence, provided the underlying research used to produce this article.

This information is drawn from GlobalData’s Power Intelligence Center, which provides detailed profiles of over 170,000 active, planned and under construction power plants worldwide from announcement through to operation across all technologies and countries worldwide.