en.Wedoany.com Reported - The CNNC Tianwan 2-Gigawatt Tidal Flat Photovoltaic Demonstration Project (Lot 7) successfully achieved its first grid connection on April 9, 2026, marking the entry of this largest-scale offshore PV project in China into the power delivery phase. The project, constructed by the Shanghai Investigation, Design & Research Institute Co., Ltd. (SIDRI) under CNNC, achieves deep coupling of nuclear power and new energy by deploying PV arrays in the warm drainage area of the Tianwan Nuclear Power Plant. The project aims to build an integrated "nuclear-PV" clean energy demonstration base with a total installed capacity exceeding 10 GW.
During the construction process, the project comprehensively implemented modular construction, establishing an efficient "land assembly, offshore lifting" operation model. Faced with a complex offshore construction environment and extremely short operational windows, the project department optimized the connection process between pile foundations and steel structures through collaborative linkage between design and construction. The successful grid connection of Lot 7 laid a technical foundation for the subsequent full-capacity 2 GW grid connection milestone. According to data from the SIDRI project team, this innovative process significantly reduced construction difficulty in high-risk sea areas and ensured project quality.
After the project reaches full capacity, its average annual on-grid electricity is expected to reach 2.2 billion kWh, sufficient to meet the annual electricity demand of 230,000 people. The project can save approximately 680,000 tons of standard coal and reduce carbon dioxide emissions by 1.77 million tons annually. As a demonstration project for "PV + nuclear power" multi-energy complementarity, its comprehensive utilization model in the warm drainage area provides technical parameter references for tidal flat PV development in China.
The construction of the CNNC Tianwan Project is driving the transformation and upgrading of the regional energy structure from traditional nuclear power to a comprehensive energy base. With the advancement of subsequent lots, this base will further strengthen Jiangsu Province's green power supply capacity. SIDRI's accumulated modular technology expertise in the offshore PV field will also provide replicable supply chain management solutions and construction guidelines for subsequent large-scale offshore clean energy projects of a similar nature.
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