Application of Rock Wool Board Insulation System at Shandong Haiyang Nuclear Power Plant

Project Name: Shandong Haiyang Nuclear Power Plant Rock Wool Board Insulation System Project
Project Location: Haiyang, Shandong Province, China
Construction Period: 2018–2019
Products Used: SUNTHERM High-Density Rock Wool Board
Quantity Used: Approx. 12,000 m³
Application Areas: Reactor building exterior walls, turbine hall roofs, auxiliary facility pipelines

▶ Project Background

Shandong Haiyang Nuclear Power Plant is one of China’s third-generation “Hualong One” demonstration projects and an important base for clean energy. The project imposes strict requirements on thermal insulation systems:

• Fire Safety: Reactor buildings and plant facilities must meet Class A fireproof standards to ensure nuclear safety.
• Thermal Efficiency: Long-term operation requires reduced energy consumption and improved heat efficiency.
• Durability and Stability: The system must maintain performance without deformation or aging over long-term service life.
• Environmental and Health Compliance: Materials must meet nuclear-grade green and safe construction standards.

1. Targeted Material Selection:

• Exterior walls and roofs: High-density rock wool board (≥140kg/m³, A1 non-combustible, thermal conductivity ≤0.040 W/m·K), providing both thermal insulation and fire resistance.
• Pipelines and equipment: Pre-shaped rock wool products, ensuring continuous insulation on complex structures.

2. Installation Process Optimization:

• Strip adhesive + anchor fixing, ensuring long-term adhesion stability.
• Critical areas installed with double staggered joints, reducing thermal bridging and improving sealing.
• Alkali-resistant mesh embedded in exterior layers to enhance crack resistance and system durability.

3. Project Management and Integration:

• Integrated BIM digital construction management, pre-simulating rock wool board layout to improve precision and efficiency.
• Coordinated with nuclear-grade protective systems to ensure safety and timely completion.

✅ Project Results

• Energy Efficiency: Annual building energy consumption reduced by more than 15%.

• Safety and Reliability: Successfully passed nuclear-grade fire and safety inspections.

• Economic Benefit: Lifecycle maintenance costs decreased by over 20%.

• Social Impact: Serves as a model project for rock wool board insulation in nuclear facilities.

★ Project Summary

The Haiyang Nuclear Power Plant project successfully applied SUNTHERM rock wool board insulation system, meeting high standards for safety, fire protection, energy efficiency, and durability. Through optimized material selection, installation techniques, and system integration, the project overcame challenges of traditional insulation materials and demonstrates the long-term value of SUNTHERM solutions for high-standard energy projects. It also provides a replicable reference for future nuclear power projects.