📋 Case Study

Ethylene Oxide Sterilization Unit QRA & Emergency Response Optimization

Inadequate off-site consequence modeling; evacuation radius underestimated by 400%

🏗️ Project Overview

Pharmaceutical contract sterilization site handling EO cylinders and vapor-phase systems

🎯 Challenge

Inadequate off-site consequence modeling; evacuation radius underestimated by 400%

🔧 Design Approach

Full QRA using ALOHA & DEGADIS dispersion models; revised EAP with real-time wind sensor integration and staged notification protocols

📐 Design Diagram

Ethylene Oxide Sterilization Unit QRA & Emergency Response Optimization EO Source (Q, u, σ_y, σ_z) ALOHA & DEGADIS Full QRA Modeling Revised EAP + Wind Sensors + Staging Real-time wind data IDLH Distance: 1,850 m (Prior: 320 m — underestimated by 400%)