Dynamic resilience assessment and emergency strategy optimization of natural gas compartments in utility tunnels

Yiping Bai, Jiansong Wu*, Shuaiqi Yuan, Genserik Reniers, Ming Yang, Jitao Cai

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

13 Citations (Scopus)
21 Downloads (Pure)


As a kind of critical infrastructure of energy transportation, so-called ‘utility tunnels’ have been developed around the world. Hosting a natural gas pipeline inside the natural gas compartment of a utility tunnel facilitates its maintenance but also brings potential explosion concerns due to the confined space. Although some work focuses on the risk analysis of the natural gas pipeline inside utility tunnels, a resilience assessment is needed for dynamically modeling leakage with interacting safety barriers. In this paper, a resilience assessment model of the natural gas compartment of utility tunnels is elaborated based on numerical simulation considering interacting barrier modeling, including sensors, a ventilation system, and the possibility of emergency shutdown. Based on the calculated (natural gas compartment) resilience for casualty and economic loss, ventilation strategies and sensor layouts can be recommended and optimization is possible. Meanwhile, the delay effect of safety barriers is investigated in this work, and the unequal interval layouts of sensors are explored and proven to be effective without any further cost. The proposed resilience assessment model can be important to further improve the safety management of utility tunnels and other confined spaces where hazardous gases are transported.
Original languageEnglish
Pages (from-to)114-125
Number of pages12
JournalProcess Safety and Environmental Protection
Publication statusPublished - 2022

Bibliographical note

Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.


  • Emergency strategy optimization
  • Natural gas
  • Resilience assessment
  • Safety barrier
  • Utility tunnel


Dive into the research topics of 'Dynamic resilience assessment and emergency strategy optimization of natural gas compartments in utility tunnels'. Together they form a unique fingerprint.

Cite this