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Analysis of Indoor Gas Leakage Amounts by Hydrogen Blending Ratio Using City Gas Accident Cases

  • Industry Promotion Research
  • Abbr : IPR
  • 2025, 10(4), pp.163~170
  • DOI : 10.21186/IPR.2025.10.4.163
  • Publisher : Industrial Promotion Institute
  • Research Area : Interdisciplinary Studies > Interdisciplinary Research
  • Received : October 20, 2025
  • Accepted : October 27, 2025
  • Published : October 31, 2025

Song-Su Tak 1 Ki-Seop Lim 1

1극동대학교

Accredited

ABSTRACT

This study analyzes indoor city gas leakage accidents and examines how hydrogen blending affects the minimum leakage amounts that can cause fire or explosion. A total of 952 gas accidents were recorded over the past 10 years (2014–2023), of which 183 (19.2%) involved city gas. Among these, 56 cases (30.6%) were indoor leaks, and 50 cases (89.3%) resulted in fire or explosion. Most indoor leaks (80.3%) occurred in residential buildings, mainly apartments with a floor area of 60~100 m², which represent the largest portion of housing in Korea. Based on typical housing conditions, leakage behavior was analyzed for different hydrogen blending ratios. The results show that as the hydrogen blending ratio increases, the minimum leakage amounts required to cause fire or explosion decreases. This indicates a higher risk of fire and explosion with increased hydrogen content, highlighting the need for enhanced leakage control and safety management.

Citation status

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