The second unit of Chaotan One — the world's first 2×15 MW supercritical CO₂ waste-heat power generation project — was connected to the grid on May 30 in Liupanshui, Southwest China's Guizhou province.

The milestone event marks the full completion of the world's first demonstration project for supercritical CO₂ waste-heat power generation technology — jointly developed by the Nuclear Power Institute of China (NPIC) of China National Nuclear Corporation (CNNC) and its partners.

The two-unit plant has an installed capacity of 30 MW — making it the world's largest, most advanced and most mature supercritical CO₂ power generation project. 

The first unit began commercial operations on December 20 and has operated reliably for more than five months, with all key performance indicators meeting or exceeding design targets. Unit one's reliability of core equipment and system stability has been proven through long-term, multi-condition tests. Following successful commissioning, the second unit is set to begin commercial operations soon.

The project's completion has further validated the technological advantages, system reliability and operational flexibility of China's supercritical CO₂ waste heat power generation technology.

As the global energy landscape undergoes profound transformation, the demand for efficient, clean and low-carbon energy technologies continues to grow. Looking ahead, NPIC plans to continue to advance innovation in supercritical CO₂ power generation and accelerate technology upgrades and commercialization. Furthermore, it will deliver more original, breakthrough technologies to support China's energy transition and its goal of becoming a global leader in science and technology.