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Externally initiated event in sequential risk assessment for the onshore LNG marine loading arm unit


Dirik, Cengiz and Awang Biak, Dayang Radiah and Abdul Razak, Mus'ab and Nik Ibrahim, Nik Nor Liyana (2022) Externally initiated event in sequential risk assessment for the onshore LNG marine loading arm unit. Journal of Loss Prevention in the Process Industries, 75. art. no. 104717. pp. 1-9. ISSN 0950-4230; ESSN: 1873-3352


This paper describes the failure assessment of the unloading arm unit that is connected to a Liquified Natural Gas (LNG) terminal. In this work, an external event, i.e., lightning, was simulated as the triggering event. A Temporal Fault Tree (TFT) analysis was developed, and sequential failures that function under the Priority AND (PAND) gate were assessed. The results show that the highest contributing factor to the failure of the terminal unloading arm was the sequential failure due to the loss of sensors which can happen before or after lightning strikes. The occurrence of failures for the loading arm was estimated using a Monte Carlo Simulation (MCS). For service years of 32.7, the sequential failures occurred 131 times when preventive maintenance was not considered. This work also presents that the failure distribution of the marine loading arm follows the Weibull distribution characteristic with the scale (α) and the shape (β) parameters values of 132,817.5 h-1 and 1.556, respectively.

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Additional Metadata

Item Type: Article
Divisions: Faculty of Engineering
DOI Number: https://doi.org/10.1016/j.jlp.2021.104717
Publisher: Elsevier
Keywords: TFTA; FTA; Sequential risk; Monte Carlo simulation
Depositing User: Ms. Che Wa Zakaria
Date Deposited: 11 Aug 2023 08:19
Last Modified: 11 Aug 2023 08:19
Altmetrics: http://www.altmetric.com/details.php?domain=psasir.upm.edu.my&doi=10.1016/j.jlp.2021.104717
URI: http://psasir.upm.edu.my/id/eprint/101441
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