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Case Study

FSRU Dynamic Mooring Analysis

Project title: FSRU Dynamic Mooring Analysis
Project location: Brazil
Project Summary:

Longitude provided a range of marine operations engineering services, including:

  • Dynamic Mooring Analysis
  • Berth and Mooring Layout Recommendations
  • Civil Engineering Design Review
  • Operational Scenario Assessment
  • Design Validation and Compliance
  • Client Support and Collaboration

About the project 

Longitude’s client was engaged to develop the LNG to Power Project in the Port of Açu, Rio de Janeiro, Brazil, through a joint venture company Gas Natural Açu (GNA).

As part of this work, our clients had a requirement to validate the current development plan and design concept for the LNG import terminal, a Floating Storage and Regasification Unit (FSRU) permanently moored alongside a breakwater, and its compliance with recognised industry design standards for the design of marine structures and mooring systems.

The FSRU’s arrival at port in Brazil.

Our scope of work 

Longitude provided an integrated service package in marine operations engineering to support with the:

  • Dynamic mooring analysis for permanent mooring on site
  • Recommendations for modifications to berth and mooring layout
  • Review civil engineering design with respect to mooring and berthing loads

The results 

Two specific conditions required an assessment as part of the study.

Firstly, the FSRU and LNGC vessels moored side-by-side were considered operational with a 1 year return period.

Our team of naval architects and marine civil engineers undertook a detailed engineering assessment of the proposed arrangements, which resulted in numerous recommendations for improvement.

Mooring analysis alongside quay.

These recommendations where taken into the detailed design phase and contributed to the successful execution of the project.

The value we delivered

Enhanced Safety and Reliability 

Our dynamic mooring analysis ensured the FSRU and LNGC could operate safely in side-by-side conditions, even in challenging environmental scenarios.

 

 

Design Optimisation 

We recommended improvements to the berth and mooring layout, helping the client refine the terminal design for long-term performance and operability.

Structural Assurance 

By reviewing civil engineering designs against mooring and berthing loads, we helped validate the integrity of marine structures over the FSRU’s 25-year design life.

Regulatory Compliance 

Our work ensured the terminal design met recognized industry standards, supporting regulatory approval and reducing project risk.

Successful Execution Support 

Our engineering input directly contributed to the detailed design and successful implementation of the LNG import terminal, enabling reliable gas supply to 3,000 MW of power generation capacity.

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