Flawless quality construction to ensure nuclear plant safety and reliability

CLP (Containment Liner Plate) Modularization Method

Technical Advantages

• Containment liner plates are crucial systems in maintaining lower than atmospheric pressure inside the containment building during nuclear emergencies, acting as pressure vessels and shielding against external radioactive material leakage. They are fabricated by welding multiple pieces of steel plates, and the welding quality greatly impacts the containment of radioactive materials. Through multi-angle design reviews and simulations, a unique lifting lug was developed and applied, successfully achieving the world's first three-level containment liner plate module installation in the Korean or the international market.
• Compared to the conventional two-level assembly method, the overall process has been shortened, and work safety and quality are improved.
• The installation of the three-level CLP reduces the time required to begin concrete pouring by 24 days.

Automatic Welding of Nuclear Reactor Coolant Piping

Technical Advantages

• The large-diameter pipes (inner diameter 1000 mm x thickness 103 mm) that connect primary-side key equipment such as reactors, steam generators, and reactor coolant pumps in nuclear power plants require precise installation, with no misalignment of equipment positions. Quality, work productivity, and safety are dramatically enhanced by using narrow grooves and automatic welding technologies.

Integrated System Stone Pitching Method for Underground Structures (Cooling Water Drainage Channel)

Technical Advantages

• The reinforced concrete structure serves as a conduit for the cooling water generated by nuclear power plants, which cools the heat and moves underground. The use of an integrated steel system stone pitching method improves quality assurance, reduces the construction period, and enhances construction safety.

Modularization Method for Main Control Room (MCR) Ceiling Structure

Technical Advantages

• The Main Control Room (MCR) ceiling steel structure, a crucial space for operating nuclear power plants, is assembled at ground level to form modules. These modules are then lifted and installed in a single operation. Ensuring precision in the construction of structural components and modules at the installation site and maintaining structural safety during module lifting enables successful lifting and installation, ultimately enhancing constructability and safety.

Reactor Building Wall Cavity Detection Technology Using Infrared Cameras

Technical Advantages

• The concrete walls within the reactor building may contain internal cavities due to the intricate reinforcement structures and low fluidity of the concrete. To address the limitations of subjective hammering tests, a technology has been developed that utilizes quantitative criteria (temperature) from infrared cameras, enabling whole-surface and real-time detection.