📋 Case Study

Offshore Wind Turbine Blade Repair Confined Space Entry

Simultaneous atmospheric hazard (VOCs), engulfment risk (resin slurry), and rescue complexity at 120m height

🏗️ Project Overview

North Sea offshore wind farm maintenance campaign

🎯 Challenge

Simultaneous atmospheric hazard (VOCs), engulfment risk (resin slurry), and rescue complexity at 120m height

🔧 Design Approach

Integrated JSA + confined space permit + real-time gas monitoring + drone-assisted rescue rehearsal

📐 Design Diagram

AI-generated project design illustration

📐 Key Calculations

Permissible Exposure Limit (PEL) Margin

Measured / PEL

Result: 0.38

Confirms safe exposure duration ≤ 8 hrs

Rescue Time-to-Intervention

Drone descent + team mobilization

Result: 92 sec

Under OSHA 1910.146(c)(2)(ii) 10-min max

📊 Results

Zero lost-time incidents across 217 entries; 100% permit compliance; 32% faster turnaround vs. prior campaign

💡 Lessons Learned

• •Confined space permits must integrate fall protection and atmospheric data
• •Drone-enabled rescue drills significantly reduce response variability

✅ Key Takeaways

• 1Confined space permits must integrate fall protection and atmospheric data
• 2Drone-enabled rescue drills significantly reduce response variability