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An Improvement of Assessing As-built Burial Risk for Subsea Cables
Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.ORCID iD: 0000-0001-7051-3256
Blekinge Institute of Technology, Faculty of Engineering, Department of Mathematics and Natural Sciences.
2022 (English)In: SyNERGY MED 2022 - 2nd International Conference on Energy Transition in the Mediterranean Area, Proceedings, Institute of Electrical and Electronics Engineers (IEEE), 2022Conference paper, Published paper (Refereed)
Abstract [en]

Available methods using the burial measurements to assess the subsea cable installations risks compare measurements to the design boundaries. The disadvantage of using this is that the assumed cable burial depths and their measurements can differ. However, it is unclear how the uncertainty in depth affects burial risk; hence, there is a need to verify the burial operations using a proper method to handle this aspect of risk reliability. We proposed a conservative cable burial scenario test, which evaluates the highest deviation between the measured risk and the design risk to indicate differences in risk based on the measurements. The result shows that the most significant deviation could be up to 55%. It proves that measurement uncertainty significantly affects the final risk evaluation. Moreover, this deviation in verifiable risk is not considered in today's boundary-level verification methodology. © 2022 IEEE.

Place, publisher, year, edition, pages
Institute of Electrical and Electronics Engineers (IEEE), 2022.
Keywords [en]
AIS, Cable Burial, CBRA, Depth of Burial, Risk Assessment, Subsea Anchor Protection Assessment, Subsea cable measurement data analysis, Subsea High Voltage Cables, High voltage cable, Measurement data analysis, Risks assessments, Subsea cables, Subseum anchor protection assessment, Subseum cable measurement data analyse, Subseum high voltage cable, Risk perception
National Category
Other Civil Engineering
Identifiers
URN: urn:nbn:se:bth-24051DOI: 10.1109/SyNERGYMED55767.2022.9941417Scopus ID: 2-s2.0-85142884490ISBN: 9781665461078 (print)OAI: oai:DiVA.org:bth-24051DiVA, id: diva2:1718122
Conference
2nd International Conference on Energy Transition in the Mediterranean Area, SyNERGY MED 2022, Thessaloniki, 17 October 2021 through 19 October 2021
Available from: 2022-12-12 Created: 2022-12-12 Last updated: 2023-03-03Bibliographically approved
In thesis
1. Analysis and improvement of risk assessment methodology for offshore energy installations: Aspects of environmental impact assessment and as-built subsea cable verification
Open this publication in new window or tab >>Analysis and improvement of risk assessment methodology for offshore energy installations: Aspects of environmental impact assessment and as-built subsea cable verification
2023 (English)Licentiate thesis, comprehensive summary (Other academic)
Abstract [en]

In the expansion of offshore sustainable energy systems, there is growing pressure on the environment and permit processes and the accumulation results in much higher total risk for accidents of future assets. Anticipating the problems at the design stage and improving verification is likely to increase energy development and reduce costs. This thesis explores offshore DST (Decision Support Tools) and risk verification of subsea cable assets.For subsea cables, a statistical method is proposed utilizing measurement data together with shipping traffic data (AIS) to estimate the environmental risk and risk of accidents of installed cable assets. This should partially solve issues of improving design using more data and surveys and utilizing mechanical and sensor-specific characteristics to improve the confidence and burial estimation, contrary to today’s methodology. The implication of the two studies of cable burial risk assessment techniques and verification shows how a developed methodology can solve issues for verifying the integrity of an installed asset. Putting our methodology into practice involves many challenges. 

For the marine Decision Support Tool (DST) and sustainable energy development, to estimate potential savings if permit processes would be shorter and less burdensome without degrading the quality of the EIA (Environmental Impact Assessment). A method is proposed to model various scenarios of effective savings from the development of a DST to reduce costs spent on EIA permitting by the offshore energy developers. The study of the implication of the marine EIA DST shows a quantifiable estimate of the savings potential for permit processes for sustainable offshore development, and results indicate a need for optimization of DST development, which can be an essential factor in its implementation and success.

 

Place, publisher, year, edition, pages
Karlskrona: Blekinge Tekniska Högskola, 2023
Series
Blekinge Institute of Technology Licentiate Dissertation Series, ISSN 1650-2140 ; 2
Keywords
DST, Decision Support Tools, subsea cables, statistical method, environmental risk, risk of accidents
National Category
Other Civil Engineering
Research subject
Systems Engineering
Identifiers
urn:nbn:se:bth-24264 (URN)978-91-7295-450-2 (ISBN)
Available from: 2023-02-08 Created: 2023-02-07 Last updated: 2023-04-19Bibliographically approved

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Olsson, AndreasFrånberg, OskarKulesza, Wlodek

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