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Wind Energy Science The interactive open-access journal of the European Academy of Wind Energy
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Discussion papers
https://doi.org/10.5194/wes-2020-15
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.
https://doi.org/10.5194/wes-2020-15
© Author(s) 2020. This work is distributed under
the Creative Commons Attribution 4.0 License.

Submitted as: research article 12 Feb 2020

Submitted as: research article | 12 Feb 2020

Review status
This preprint is currently under review for the journal WES.

Systemic hazard analysis of offshore service operations

Romanas Puisa1, Victor Bolbot1, Andrew Newman2, and Dracos Vassalos1 Romanas Puisa et al.
  • 1Maritime Safety Research Centre, University of Strathclyde, UK
  • 2Global Marine Group, UK

Abstract. As windfarms are moving further offshore, logistical concepts increasingly include service operation vessels (SOV) as the prime means of service delivery. However, given the complexity of SOV operations in hostile environments, their safety management is challenging. The objective of this paper is to bring awareness of hazards that may have been overlooked in earlier assessments, and allow for a preliminary comparison of various operational stages. To this end, we use a systems approach to identify and analyse hazards arising during the SOV transit and manoeuvre within a windfarm and interfaces with turbines and daughter crafts. The hazard analysis is performed by systemic method STPA, allowing to explore hazardous scenarios caused by flawed interactions between system components and, to a lesser extent, by component failures. The results comprise 23 operational hazards arising during the three stages of SOV operation and 1270 hazardous scenarios (pathways) leading to the hazards. The preliminary comparison of SOV operations shows that approaching and departing from turbines in auto and manual modes is potentially the riskiest stage of SOV operation. The lowest risk is of the SOV interface with daughter crafts. The paper discusses the analysis results and explains how they can be used to inform new and existing safety management systems of SOV.

Romanas Puisa et al.

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Status: open (until 25 Mar 2020)
Status: open (until 25 Mar 2020)
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Romanas Puisa et al.

Romanas Puisa et al.

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Latest update: 16 Feb 2020
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Short summary
As windfarms are moving further offshore, logistical concepts increasingly include service operation vessels (SOVs) as the prime means of service delivery. Complex SOV operations make their safety management difficult. Existing risk assessments are done piecemeal and potentially lacking completeness when integrated. The paper performs systemic hazard analysis to (1) bring awareness of hazards that may have been overlooked and (2) allow for a preliminary comparison of various operational stages.
As windfarms are moving further offshore, logistical concepts increasingly include service...
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