Safety Assessment of LNG Offshore Storage and Regasification Unit (eBook)

Published Date

January 2002

Safety Assessment of LNG Offshore Storage and Regasification Unit (eBook)

(Excludes any applicable taxes)

This paper demonstrates how present technology allows the construction and operation of FSRU units that are at least as safe as offshore oil storage floating installations. (29pp)

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Within the AZURE R&D project, a complete feasibility analysis of a FULL FLOATING LNG chain was carried out covering design aspects of the LNG FPSO (Floating Production Storage Offloading), the LNG shuttle tanker fleet, the LNG FSRU (Floating Storage Re-gasification Unit) as well as the BTT (Boom To Tanker) LNG transfer system.

Outlines of the overall project results as well as of a few specific design aspects were presented in a series of papers at previous GASTECH conferences. The aim of this paper is to complete this overview by providing insight into the specific safety aspects of the FSRU and the related gas transfer system.

More specifically the key issues of an FSRU's safety can be identified as follows:
- risk acceptance criteria: the FSRU is an hybrid installation which presents features (and risks) typical of both offshore oil storage units and of oceangoing LNG ships; hence, ad hoc risk acceptance criteria are needed;
- results of the risk assessment – FSRU topside: from a design standpoint, the topside is of particular interest since, contrary to LNG oceangoing ships, the process equipment located there is normally operating thus introducing risks neither normally considered nor regulated onboard ships;
- results of the risk assessment – BTT LNG transfer system: the LNG transfer system is clearly the most critical issue from both safety and operational standpoint, detailed re-design based on risk assessment was a must in the project;
- applicability of the IGC Code: several safety issues can be approached based on the International Code of Safety of Gas Carriers (IGC Code), particularly as far as LNG storage, floater's stability, power generation & distribution and crew accommodation are concerned.

As a result of the study, it was proved that present technology allows the construction and operation of FSRU units which are at least as safe as presently operating offshore oil storage floating installations: the basis of this statement are illustrated and documented in the present paper.

Paper Delivered by:
Mario Dogliani (RINA SPA, Italy)

Prepared for:
Gastech Doha 2002

For over 45 years, the Gastech Exhibition & Conference has been at the forefront of the international gas and LNG market. This world-renowned event is regarded as the most significant meeting place for gas and LNG professionals, where the global industry gathers to do business.

Gastech hosts major IOCs, NOC’s, global utility companies, EPC contractors, shipbuilders, pipeline companies, manufacturers, distributors, technology and service providers, all who play an active role in the global energy value chain.

Title: Safety Assessment of LNG Offshore Storage and Regasification Unit (eBook)
Product Code: 4433g153
Published Date: January 2002

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