Temporary Refuge Impairment Analysis (TRIA)
Temporary Refuge Impairment Analysis (TRIA) assesses whether a facility’s temporary refuge (TR) can remain habitable and protect personnel for the required endurance period during fires, explosions, or toxic gas releases. TRIA supports emergency planning, and regulatory compliance to ensure that all occupants can survive safely until evacuation or recovery.
Service information
- Quantify overpressure, thermal radiation, heat flux, smoke ingress, and toxic gas concentrations at and within the temporary refuge location
- Predict internal conditions, including temperature rise, air quality, visibility, and gas concentration evolution during major accident events
- Assess the effectiveness of HVAC shutdown, fire and gas detection, dampers and pressurisation systems in maintaining TR integrity
- Determine maximum safe occupancy, available endurance duration, and evacuation timelines under various impairment scenarios
- Align assessments with regulatory frameworks and international standards, including ISO 13702, NORSOK S-001, API RP 752/753, and HSE guidance
- Integrate TRIA outputs into safety cases, COMAH reports, evacuation analyses (EERA), and ALARP demonstrations
- Incorporate TRIA results into the facility QRA (Quantitative Risk Assessment)
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