Mooring of MRE Structures - Comparison of Codes, Including IEC

摘要

Objectives/ScopernThis paper presents guidance on the design and selection of mooring systems, including anchors,rnspecifically for Marine Renewable Energy (MRE) systems. It is based in part on the work of the ASCErnCOPRI MRE Committee over the last five years. The document gives guidance to MRE designers andrnanalysts and gives confidence as to mooring systems reliability.rnMethods, Procedures, ProcessrnThere are a few MRE systems, especially for Wave Energy Converters (WECs) that have evolved,rnwhich may be regarded as having a basically similar mooring system. However, selection of designrncriteria, including environmental conditions return period (and other parameters) as well as safety factorsrnfor WEC moorings has not yet evolved into a standard procedure. This paper contrasts the mooring systemrncharacteristics that are found for some typical WEC moorings when their design is selected to meetrnvarious mooring codes and standards. Codes considered include those published by:rnISOrnAPIrnABSrnDNVrnLloydsrnIEC (International Electrotechnical Commission)rnUS NavyrnResults, Observations, ConclusionsrnDifferences in the mooring codes are contrasted. Differences in the resulting mooring systemsrncharacteristics are contrasted resulting from using different codes. Differences in the systems are alsorncontrasted with selection of different return periods and other environmental parameters. The results arernalso presented in the framework of the MRE Committee’s approach to risk and reliability that has beenrndeveloped by the oil and gas (O&G) industry over the last 40 years.rnNovel/Additive InformationrnThis paper presents an insight as to what is in the ASCE COPRI MRE guide for moorings