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Arctic Offshore Loading Downtime Due to Variability in Ice Drift Direction

Published online by Cambridge University Press:  15 December 2005

Basile Bonnemaire
Basile Bonnemaire
Affiliation:
Norwegian University of Science and Technology. Barlindhaug Consult AS. Email: basile.bonnemaire@barlindhaug.no
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Abstract

Four arctic offshore loading concepts are selected, loading from the corner of a platform, loading in the wake of a loading tower, Submerged Turret Loading (STL) and Single Anchor Loading (SAL). The influence of variations in the ice drift direction on the performance of these concepts is discussed and critical drift events are determined. Ice drift measurements from eight ARGOS/GPS buoys deployed in the Pechora Sea in winters 1995 and 1998 are analysed to estimate downtime rates of these loading systems due to ice drift heading changes. Depending on the location in the Pechora Sea and the chosen concept, downtime rates range from 6 to 72%. A discussion on how these rates will vary with different assumptions, different ice conditions or different ice management is given. Finally the loading concepts are compared through a qualitative risk analysis.

Keywords

arctic offshore loadingice drift directiondowntime
Type
Research Article
Information
The Journal of Navigation , Volume 59 , Issue 1 , January 2006 , pp. 9 - 26
Copyright
© 2006 The Royal Institute of Navigation

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