en.Wedoany.com Reported - At 2:40 AM on April 7th, with the last truckload of concrete precisely poured into the formwork, the nuclear island raft foundation base slab concrete pouring for Unit 2 of the Zhejiang JinQimen Nuclear Power Plant, constructed by China Nuclear Industry 22 Construction Co., Ltd., was successfully completed. This pouring operation lasted nearly 60 hours, with a total concrete volume of 6,739 cubic meters.
The JinQimen Nuclear Power Project is located in Xiangshan County, Ningbo, Zhejiang Province. The project plans to construct six million-kilowatt-class pressurized water reactor nuclear power units. Among them, Units 1 and 2 adopt the third-generation nuclear power technology "Hualong One", which possesses China's complete independent intellectual property rights, with a rated capacity of 1.2 million kilowatts per unit. Upon full completion, the project will have an installed capacity of approximately 7.2 million kilowatts, with an estimated annual power generation of 55 billion kilowatt-hours. This is equivalent to reducing carbon dioxide emissions by about 45 million tons and afforesting an area equal to 65 times that of Ningbo's Dongqian Lake.
As the civil construction contractor for the project, China Nuclear Industry 22 Construction Co., Ltd. has integrated the "New Quality Hualong" construction philosophy throughout the construction process. It is driving the comprehensive high-standard, high-quality construction of Unit 2's nuclear island with a new paradigm of "Digitalization, Intelligence, and Integration".
"Digitalization" Promotes Quality and Efficiency Improvement
Relying on the new-generation lean construction platform for nuclear power, "Digital Project Management" and "Digital Production Construction" have been realized. Using time to drive schedule management, resource pre-loading configurations are completed in advance, triggering full-process operations such as technical document preparation, resource allocation, material distribution, and construction work, ensuring efficient on-site progress. The digital platform is interconnected with data from the intelligent rebar production line, driving the digital management of the entire rebar lifecycle. On-site application of automatic rebar processing equipment and binding robots has increased production efficiency by over 50%. Innovative processes such as large formwork with fewer tie rods and new slab support systems have been applied to overcome traditional construction efficiency and quality bottlenecks. The application of a full-process digital quality control platform achieves seamless integration from intelligent risk identification, 3D visual technical disclosure, real-time inspection and entry via mobile APP to closed-loop issue resolution, improving acceptance efficiency by 30%.
"Intelligence" Solves Quality Challenges
Facing the challenge of controlling cracks in mass concrete, the project team adopted a "data-driven, model-driven" approach to break through. Before the FCD (First Concrete Date) pouring, finite element analysis software was used to conduct precise "digital rehearsals" of the planned concrete pour, providing reliable data support for formulating scientific temperature control plans. The nuclear island raft foundation poured this time has a diameter of 52 meters and required a single continuous pour of C45P8 high-strength concrete, representing a massive pour volume. To ensure the flawless pouring of this "super base", the project team constructed a digital foundation of "BIM + Intelligent Monitoring", enabling real-time monitoring of the concrete's internal temperature field throughout the entire process. Data-driven dynamic adjustments to curing measures minimized the risk of cracks in the mass concrete.
"Integration" Demonstrates Synergistic Efficiency
The project team deeply implements the fundamental principle of "sharing benefits and sharing risks", working together with all participating parties to establish an "eight-in-one" working structure. This promotes the achievement of management goals such as "optimizing design division, optimizing management chains, reducing redundant resource investment, and reducing information deviations". Based on the project's integrated design and construction team, active promotion of design-construction integration has been carried out, cumulatively implementing 32 optimization measures. Based on the project's integrated design and construction task force, over 900 on-site and drawing issues have been efficiently communicated and resolved. Based on internal company integration efforts, collaboration with the Mechanization Engineering Branch and the Steel Structure Branch has successfully bridged the "last mile" of on-site material transportation. During the nearly 60-hour continuous pouring operation, a grid-based responsibility area was established on-site. Management and operational personnel conducted seamless shift handovers, ensuring precise control over all elements of "Man, Machine, Material, Method, and Environment".
In the future, China Nuclear Industry 22 Construction Co., Ltd. will continue to advance the construction of the JinQimen Nuclear Power Project with high standards and strict requirements. It will rigorously implement all construction standards and safety regulations, drive construction efficiency improvement through technological innovation, and ensure project quality through meticulous management. The company is committed to building the project into a "Safe, Technological, Economical, Digital, and Clean" New Quality Hualong, contributing to the high-quality development of China's nuclear industry.
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