Quantitative Risk Assessment Methodology for Hydrogen Tank Rupture in a Tunnel Fire

This study presents a methodology of quantitative risk assessment for the scenario an onboard hydrogen storage tank rupture and tunnel fire incident. The application is demonstrated on road tunnel. consequence analysis carried out 70 MPa, 62.4-litre in fire, that has thermally activated pressure relief device (TPRD) failed or blocked during Scenarios with two states charge (SoC) tank, i.e., SoC = 99% 59%, are investigated. risks terms fatalities per vehicle year cost incident assessed. It found reduction hydrogen-powered to acceptable level 10?5 fatality/vehicle/year, fire-resistance rating (FRR) should exceed 84 min. FRR increase this reduces societal level. 91 min GBP 300, following threshold minor injury published by UK Health Safety Executive. Frequency–Number (F–N) curve developed demonstrate effect mitigation measures socially levels. performed sensitivity confirms broad range input parameters, including brigade response time, standard tank-TPRD systems inside unacceptable. One solutions enabling inherently safer use vehicles tunnels implementation breakthrough safety technology—the explosion free self-venting (TPRD-less) tanks.