en.Wedoany.com Reported - At 10:48 on June 15, as the 2000-ton crawler crane slowly unhooked, Module 3 of the steel liner for Unit 1 of Zhejiang Jinqimen Nuclear Power Plant was precisely hoisted into place, with the entire hoisting process lasting 2 hours and 40 minutes. The smooth completion of this key milestone marks the official transition of the inner containment shell construction for Unit 1's reactor building into a multi-layer continuous construction phase, laying a solid foundation for subsequent inner and outer shell operations.
Module 3 of the steel liner adopts an integrated construction process of one-time assembly and integral hoisting of three layers of the cylindrical wall, integrating the originally separate hoisting of cylindrical wall sections 4, 5, and 6, along with penetration sleeves and anchorages, into a single "package" for one-time hoisting and placement. As a large structural module hoisting operation for the Jinqimen Nuclear Power Plant project, compared to traditional hoisting methods, the three-layer integrated construction effectively reduces high-altitude hoisting and on-site welding workload, significantly enhancing the safety and quality of steel liner construction. The project department's Party branch deeply cultivates the "Party building + quality excellence" integration platform, designating the optimization of the integrated process as a Party member research task. Relying on Party member quality supervision posts, it conducts full-coverage verification of component assembly, penetration sleeve, and anchorage welding key processes, establishing a robust pre-quality control defense line.
To ensure the success of this "millimeter-level" hoisting, the project team established a Party member assault team, simultaneously delineated Party member safety responsibility zones, implemented a Party member zonal responsibility mechanism for safety and quality, and incorporated hoisting risk control and precision control into Party member duty lists. Addressing construction challenges such as easy deformation of thin-walled curved surfaces, difficulty in controlling the posture of oversized and overweight components, and high precision requirements for millimeter-level placement, technical plan optimization, hoisting operation instruction preparation, and simulated hoisting were carried out in advance. During the formal hoisting, strict adherence to the three-stage implementation of simulated hoisting, trial hoisting, and formal hoisting was followed. A 2000-ton crawler crane was selected, using a super-lift fixed jib special configuration, with precise control over every core action including lifting, slewing, traveling, and placement. Throughout the hoisting period, Party member key members provided full-time on-site monitoring, simultaneously conducting dynamic position monitoring and on-site safety inspections, addressing minor hazards in a closed-loop manner, and upholding the dual bottom lines of hoisting safety and precision.
In the future, China Nuclear Industry 22nd Construction Co., Ltd. will continue to deepen modular, standardized, and digital-intelligent construction, normalize Party member safety and quality duty performance, adhere to innovation-driven development, and persistently contribute to the efficient and safe construction of the Jinqimen Nuclear Power Plant project and the high-quality development of the nuclear industry.
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