Mini-HAZOP and LOPA – open drain offshore wind power substation

MAR Consulting facilitated a mini-HAZOP (hazard and operability) and a LOPA (layers of protection) analysis of an open drain system in an offshore wind substation platform. Since the platform is normally unmanned and due to environmental conditions in the region (South Korea), the Operator prefers to discharge the open drain inventory to sea. The discharge shall be processed to avoid potential contaminants (such as transformer oils, foam from active fire protection, etc) to sea. Discharging to sea is an alternative to collecting the open drain in a sump tank and potentially requiring extra de-bunkering visits. The objective of the HAZOP […]

HAZID topside offshore wind substations in East Coast USA

Introduction MAR Consulting facilitated a hazard identification (HAZID) workshop of topsides of three (3) offshore wind substations (OSS) platforms. The methodology was based on the guidewords from DNV-ST-0145 with addition of other relevant topics such as work environment related hazards. The HAZID of offshore wind substations covered the topside during the operational phase only. The substructure including the application of the structure as a system for supporting the topside and for transfer to / from a crew transfer vessel (CTV) were not assessed in this HAZID. Participation from the different engineering contractors, as well as the operator and a 3rd […]

LOPA module integration FPSO

MAR Consulting was contracted to support with a layers of protection analysis (LOPA) of one module integration in a floating production, storage and offloading (FPSO) vessel. The project may require additional barriers to protect the new equipment to be installed. These barriers can be, among other options, safety instrumented functions (SIF). LOPA is one method to allocate safety integrity levels (SIL) to SIFs if additional risk reduction is necessary. The objectives of the LOPA/ SIL allocation were to: Verify if the existing barriers are sufficient, and the risk level is sufficiently reduced such that the tolerability criteria is achieved to […]

Scope of Work RAM study offshore wind substation

MAR Consulting prepared a scope of work and methodology report showing how a reliability, availability and maintainability (RAM) shall be performed for an offshore substation engineering project. The offshore substations will be receiving power from wind turbine generators and transmitting it to shore. MAR Consulting will eventually support the engineering team to develop the RAM model and analysis, depending on project award to Client. MAR Consulting has extensive experience performing RAM analysis in a variety of projects and industries. Please contact us if you need support on reliability, availability and/ or maintainability analysis.

SAFOP wellhead platform central North Sea

Introduction MAR Consulting facilitated a Safety and Operability (SAFOP) workshop of the electrical equipment in an offshore wellhead platform for an ultra-HPHT (high pressure high temperature) gas condensate field located in the Central North Sea. The online workshop was attended by discipline experts from engineering contractors and subcontractors as well as the asset operator. The objectives of this SAFOP were to: Assess and minimize potential hazards to persons around or in the electrical installations; Provide a critical review of the electrical system design and equipment, assess any limitations and their effects on operability, safety and security of the system; Analyse […]

QA/QC RAM analysis turret and mooring FPSO

MAR Consulting provided quality assurance (QA) and quality control (QC) of a Reliability, Availability and Maintainability (RAM) analysis of a turret and mooring of a Floating Production, Storage and Offloading (FPSO) vessel. The system consisted of a single point mooring and submerged turret production (STP), based on technology developed by the client. The RAM analysis documented the methodology and results in terms of production efficiency for the turret and mooring system.

FSA 3 overpressure protection functions

MAR Consulting was contracted to perform a functional safety assessment (FSA) stage 3 of overpressure protection functions in an offshore platform in the Norwegian Continental Shelf (NCS). The main objective of an FSA is to demonstrate compliance with IEC 61511 and 61508 functional safety standards, NOROG 070, and Petroleum Safety Authority (PSA) regulations through an independent assessment of the development process. Hence, the FSA process is a fundamental tool to ensure that the Safety Instrumented System (SIS) fulfills its requirements as an active barrier to reduce risk to acceptable levels. The FSA team shall have some degree of independence to […]

3rd party investigative study of ESD and SIS of offshore asset

MAR Consulting performed an investigation on the safety systems of an offshore platform in the UK sector. Focus was on the Emergency Shutdown (ESD) and Anclilliary systems such as Safety Instrumented Systems (SIS). A list of findings and deviations of the current design and design documentation was presented to the client. The outcome will be used by the client to improve the safety of the design and meet requirements from UK regulators.

RAM analysis subsea tie-back

MAR Consulting supported the development of a Reliability, Availability, and Maintainability (RAM) study for a new field subsea tie-back in the Norwegian Continental Shelf (NCS). The objective of the study was to provide the production efficiency (PE) estimates for the subsea field value chain in accordance with a revised base case and a high-level assessment for other three cases with different number of wells. In addition, a sensitivity analysis was performed for increased mobilization times due to no spare parts for the subsea production system (SPS), and subsea umbilical riser flowline (SURF).

HVAC system design review of FPSO lifetime extension

MAR Consulting facilitated a Design Review for the HVAC systems in a Floating Production, Storage and Offloading (FPSO) vessel, as part of lifetime extension modifications. The workshop was performed online with discipline experts from Engineering Contractors and Operator. The workshop was structured as a qualitative analysis following a list of guidewords to make use of the multidisciplinary experience and knowledge of the participants. The objectives of the workshop were to: Identify gaps towards Authorities rules & regulations and Client / project requirements; Review the current design with regards to safety, operability, and maintainability, i.e., areas where it may represent a […]