Deaerator in Place for Unit 1 Conventional Island of Huaneng Shidao Bay Nuclear Power Expansion Project

Recently, the deaerator for Unit 1 conventional island of Phase I Expansion Project of Huaneng Shidao Bay Nuclear Power Station, undertaken by PowerChina Nuclear Engineering Company, was successfully hoisted and placed into position, marking a key milestone in the installation of conventional island equipment for the unit and creating conditions for subsequent turbine equipment installation, piping layout, and system commissioning.

The Huaneng Shidao Bay Nuclear Power Base currently hosts a high-temperature gas-cooled reactor demonstration project, the world's first fourth-generation nuclear power plant to achieve commercial operation. The Phase I Expansion Project plans to build two Hualong One units, third-generation nuclear power units independently developed by China, each with a capacity of 1.225 million kilowatts. Upon completion, the project is expected to provide approximately 20 billion kilowatt-hours of clean electricity annually, reduce standard coal consumption by 5.78 million tons, and cut carbon dioxide emissions by 14 million tons.

The deaerator is a critical piece of equipment in the thermal system of the conventional island of a nuclear power plant, and its installation precision and positioning quality are directly related to the stable operation of the subsequent thermal system. This hoisting adopted a sectional lifting scheme, with the heaviest section weighing 132 tons, imposing high requirements on the design of the lifting plan, precision of equipment foundations, on-site coordination, and process sequencing.

To ensure the safe and precise execution of the hoisting operation, the project team conducted advance reviews of equipment foundations, material assurance, and pre-installation condition inspections, and verified key parameters such as foundation dimensions, elevations, and bearing precision. For equipment delivery and material supply, the project department organized and coordinated relevant parties to complete equipment acceptance and conducted multiple simulation drills of the hoisting process, refining operational steps and emergency measures.

During the hoisting process, the construction team exercised full-process control over lifting, slewing, alignment, and seating, successfully completing the hoisting of the two deaerator sections. The operation proceeded smoothly and orderly, with all relevant parameters meeting requirements, achieving success in a single lifting attempt.

The placement of the deaerator marks an important phased milestone in the Phase I Expansion Project of Huaneng Shidao Bay Nuclear Power. In the next steps, the project will continue to advance conventional island equipment installation and related system construction, focusing on key subsequent construction phases.