On September 8, the generator rotor of Unit 1 of the Datang Yuncheng world's first 630°C ultra-supercritical double-reheat national power demonstration project, constructed by PowerChina Nuclear Engineering Company, was successfully inserted in a single attempt, laying a solid foundation for the unit's subsequent installation, commissioning, and on-schedule commercial operation.

The Datang Yuncheng project is a million-kilowatt-class coal-fired national power demonstration project, shouldering the important mission of leading the development of efficient and clean coal power in China. With "reheat steam temperature reaching 630°C" and "power generation thermal efficiency exceeding 50%" as its demonstration highlights, the project is the world's first single-shaft million-kilowatt-class double-reheat thermal power unit featuring the "highest pressure, highest temperature, highest efficiency, and lowest coal consumption." After commissioning, the project will generate up to 10 billion kWh of electricity annually, save more than 100,000 tons of standard coal, and reduce carbon dioxide emissions by 267,000 tons, delivering significant energy-saving and emission-reduction benefits as well as exemplary leadership value.

Since the project commenced, the Yuncheng project department of PowerChina Nuclear Engineering Company has consistently adhered to the construction philosophy of "safety first, quality foremost, lean management, and collaborative efficiency," strictly implemented various standardized and refined management measures, strengthened construction organization and process control, and made every effort to ensure high-quality completion of project milestones. The generator rotor inserted in this operation weighs 105 tons and has a diameter of more than 1.3 meters, with a minimum stator-rotor clearance of only 27 millimeters; the construction is highly difficult and demands high precision, making it a key control point in the unit installation process. The project department prepared a special construction plan in advance, defined the "quality objective of first-time acceptance and safety objective of zero accidents," organized joint inspections by all relevant units, and strictly implemented all requirements to ensure construction conditions were met. During the generator rotor insertion process, all on-site personnel worked in unity and cooperation, strictly controlled key steps such as lifting, sliding, and positioning, and overcame technical challenges including confined working space and high alignment precision, successfully completing the smooth insertion of the rotor. Closed management and real-time monitoring were implemented throughout the process, and both quality and safety met design and process requirements.

The smooth insertion of the generator rotor marks a new stage in the construction of the world's first 630°C unit and creates excellent conditions for subsequent installation and commissioning. Next, the Yuncheng project department of PowerChina Nuclear Engineering Company will continue to maintain its drive to tackle challenges, carry forward the spirit of the nuclear power iron army, strictly control safety and quality, ensure the unit is built and commissioned with high quality, and contribute to the optimization of China's energy structure and green, low-carbon development.