Computational justification of single-hull structure design for the berth-connected reinforced concrete storage unit for oil products

The article presents the main results of the scientific research work aimed at analyzing the possibility and computational justification of an alternative design solution for a berth-connected reinforced concrete storage vessel for oil products. The design is made in accordance with the requirements of resolutions MEPC.110(49) and MEPC.311(73) taking into account the special aspects of operation. The vessel is designed without a double bottom and double sides, which does not meet the requirements of 19.3.1 and 19.3.6 of MARPOL 73/78 Annex 1. The justification of alternative design solution safety has been made by calculation of the pollution prevention index. Such index is determined on the basis of oil spill parameters in the event of a side and bottom damage of the vessel hull in accordance with resolution MEPC.110(49). Additionally, calculations of the hull strength in a relatively mild collision have been carried out, together with assessment of the occurrence probability of such incident. Based on the above, a risk assessment have been carried out and decisions on the safety of an alternative vessel design solution for the assigned operation purposes have been made.

1. MEPC.277(70). Amendments to the Annex of the International Convention for the Prevention of Pollution From Ships, 1973, as Modified by the Protocol of 1978 Relating thereto. — London: IMO, 28.10.2016.

2. MEPC.311(73) Guidelines for the application of MARPOL Annex I requirements to floating production, storage and offloading facilities (FPSOs) and floating storage units (FSUs). — London: IMO, 26.10.2018.

3. МЕРС.110(49) Revised interim guidelines for the approval of alternative methods of design and construction of oil tankers under regulation 13F(5) of Annex I of MARPOL 73/78 — London: IMO, 18.07.2003.

4. MSC/Circ.1023 — MEPC/Circ.392. Guidelines for formal safety assessment (FSA) for use in the IMO rule–making process. — London: IMO, 05.04.2002.

5. Rules for the Classification, Construction and Equipment of Mobile Offshore Drilling Units and Fixed Offshore Platforms, St. Petersburg, Russian Maritime Register of Shipping, 2018. (In Russian)