The first concrete was poured for unit 3 of the Sanmen nuclear power plant on June 28 in East China's Zhejiang province, marking the start of the plant's second phase project.

The China National Nuclear Power under the China National Nuclear Corporation (CNNC) has built and put into operation 11 nuclear power units at the Qinshan and Sanmen plants. The first phase project of the Sanmen plant, units 1 and 2, was connected to the grid and put into commercial operation in 2018, and has since generated more than 60 billion kilowatt hours.

After the two units of its second phase are fully operational the Sanmen plant is expected to have an installed capacity of 5 million kilowatts, and to generate 40 billion kilowatt hours each year, which is equivalent to reducing 30 million tons of carbon dioxide emissions. This will help optimize the industrial structure and energy mix in Zhejiang and is of great significance for the province's shift to green and low-carbon energy as well as its high-quality economic and social development.