The objectives of the project was to provide oil and gas companies operating in the GOM with the tools necessary to design "inherently safer" offshore facilities that can survive gas explosion incidents and prevent escalation. This project enhanced and validated the capabilities of the industry-standard explosion modeling CFD software, FLACS, to aid in reducing the HS&E-related incidents in the GOM. The project has improved and adapted the capabilities of FLACS to predict MCE early in the design phase of GOM UDW drilling and production facilities and provide the information necessary to design facilities to mininmize the consequences of explosion incidents. The project was divided into two phases. Phase 1, the FLACS DDT onset prediction capability was validated for scales and geometries relevant to GOM UDW structures through a series of large-scale experiments to provide data for model validation of FLACS. In Phase 2, an anticipated congestion methodology (ACM) was developed for GOM offshore drilling and production facilities.