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Quantitative Risk Assessment for IOCL- Rajkot Depot, Gujarat

The IOCL Rajkot Depot was commissioned in the year 1987 and is primarily used for the receipt and storage of High Speed Diesel / High Flash-HSD through Railway Tank wagon from GRI-Koyali, IOC-Kandla, EOL-Vadinar. Indian Oil Corporation Limited has entrusted iFluids Engineering to carry out Quantitative Risk Assessment (QRA) study for the Rajkot Depot.

The following facilities were assessed under the QRA study:

  • Storage of Petroleum Products in Tanks
  • Distribution of Petroleum Products by Filling Tank Trucks. 

The primary objective of the QRA study is to estimate the potential risk levels for personnel due to accidental release of hazardous materials from loss of containment scenarios from the facilities and to demonstrate that individual risks are within the broadly acceptable regions and to provide suitable control measures for the Gaps identified in line with the PNGRB T4S Regulation 2020.

The QRA study consists of the following:

  • Identification of Hazards and Major Loss of Containment (LOC) events
  • Quantification of physical effects of failure case scenarios which includes estimation of Jet Fire and Pool Fire heat radiation distances, Flammable gas dispersion distances, and overpressure explosion distances
  • Estimation of  Failure Frequency
  • Assessment of Societal risk and estimation of Potential Loss of Life
  • Risk assessment to confirm that risks can be mitigated consistent with the ALARP principle according to the UK HSE risk acceptance criteria

The QRA study results provided recommendations for risk reduction measures to ensure all computed risks are in the ALARP or Acceptable Region, which were reviewed and accepted by IOCL Rajkot.

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