Assessing the Quantitative Risk of Urban Hydrogen Refueling Station in Seoul, South Korea, Using SAFETI Model

Hyunjun Kwak, Minji Kim, Mimi Min, Byoungjik Park () and Seungho Jung ()
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Hyunjun Kwak: Department of Environmental and Safety Engineering, Ajou University, Suwon 16499, Republic of Korea
Minji Kim: Department of Environmental and Safety Engineering, Ajou University, Suwon 16499, Republic of Korea
Mimi Min: Department of Environmental and Safety Engineering, Ajou University, Suwon 16499, Republic of Korea
Byoungjik Park: Department of Fire Safety Research, Korea Institute of Civil Engineering and Building Technology, Hwaseong 18544, Republic of Korea
Seungho Jung: Department of Environmental and Safety Engineering, Ajou University, Suwon 16499, Republic of Korea

Energies, 2024, vol. 17, issue 4, 1-20

Abstract: Hydrogen refueling stations (HRS) operating at high pressures pose a higher risk of leakage than conventional gas stations. Therefore, in this study, a quantitative risk assessment (QRA) was conducted using DNV-GL SAFETI v.8.9. The impact of the shutoff valve was quantitatively assessed, and step-by-step mitigation was applied to propose the minimum installation requirements for the valve necessary to achieve broadly acceptable risk levels. The QRA includes sequence analysis (CA), individual risk (IR), and societal risk (SR), with accident scenarios consisting of catastrophic ruptures and three leak scenarios. The research results indicate that the application of a dual shutoff valve system resulted in an IR of 7.48 × 10 −5 , effectively controlling the risk below the as low as reasonably practicable (ALARP) criteria of the Health and Safety Executive (HSE). The SR was analyzed based on the ALARP criteria in the Netherlands, and the application of the dual shutoff valve system effectively controlled the risk below the ALARP criteria. Consequently, this study suggests that applying a dual shutoff valve system with a mitigation value exceeding 1.21 × 10 −2 can successfully mitigate the risk of urban hydrogen refueling stations to broadly acceptable levels.

Keywords: hydrogen refueling station; quantitative risk analysis; SAFETI; jet fire; fireball; vapor cloud explosion; consequence analysis; individual risk; societal risk (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2024
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