On December 18, Dadi Steel Structure successfully completed the installation of the roof protection shed and the removal of the original roof grid for the Qinshan Unit 2MX plant's roof grid lifting project. This marks a major milestone and the beginning of a new phase in the construction.

Project Overview

Qinshan Nuclear Power Station, located in Haiyan County, Jiaxing City, is China's first domestically designed, built, and operated nuclear power plant. It consists of three phases with nine generating units. Since its operation in December 1991, it has generated over 840 billion kWh of electricity, reducing CO₂ emissions by 760 million tons and increasing forest coverage by an area equivalent to 520 West Lake scenic spots.

Phase II of the plant, consisting of four 600 MW units, started in 1996, with two additional units built in 2006 using pressurized water reactor technology. This project was a key step in advancing China's nuclear power development.

Collaboration History

• First Cooperation (1999): Dadi Steel Structure worked on the fabrication and installation of the roof grid and enclosure for the 2MX turbine building in Phase II.
• Second Cooperation (2007): Dadi Steel Structure handled the roof grid and enclosure for the 3# turbine building during Phase II expansion.

This marks Dadi Steel Structure's third collaboration with Qinshan Nuclear Power, focusing on the removal and restoration of the roof grid for the 2MX turbine building, due to equipment upgrades.

Project Challenges

As a high-risk project, the dismantling posed several challenges. The operation had to take place while Unit 2 was running, and the dismantling area was directly above the generator. The work also had to be precise to avoid damage to surrounding structures and ensure safety.

To meet these challenges, the team used 3D3S software for detailed calculations and created comprehensive safety plans. Strict safety protocols were followed, with constant supervision to ensure compliance and avoid accidents.

The specialized plan was reviewed by experts in mid-October, and work began on October 20. The project was completed eight days ahead of schedule, with all tasks carried out safely and efficiently.

Significance

The successful completion of this project highlights Dadi Steel Structure's expertise in nuclear plant renovations and reinforces the trust Qinshan Nuclear Power has placed in the company over the years. This achievement further boosts Dadi's confidence in handling similar large-scale renovation projects in the future.