Client name: Marine Harvest ASA
Project outline: Quantitative Risk Assessment, Classification plans, Explosion Protection Document, SIL assessment, Contingency and emergency plans, Safety report.
Client background: Marine Harvest ASA is one of the largest seafood companies in the world, and world’s largest producer of Atlantic salmon. The company employs 11,715 people, and is represented in 23 countries. The company has a strong focus on innovation and is committed to a socially and environmentally sustainable aquaculture. With the establishment of a new fish food factory in Sør-Trøndelag (central Norway), sustainability was therefore a natural factor in the design process.
The project in brief
The factory was to produce finished products for direct distribution to fish farms in the North Sea area. For a sustainable production, the factory would rely on liquefied natural gas (LNG) for fuelling fish feed carriers and as energy source for steam production and dryer equipment.
The natural gas was to be stored in three horizontal vacuum insulated pressurised tanks, each with a storage capacity of 250 m3.
In order to attain the required LNG permission, Marine Harvest needed to demonstrate to the Norwegian Directorate for Civil Protection (DSB) that establishment and operation of the plant would be safe.
With a maximum storage capacity of over 200 tons, the plant needed to comply with the DSB acceptance criteria, building on the Seveso Directive*. But since construction of the plant was already progressing and the scheduled production start approaching, time was of the essence.
Any delay in attaining the permission could mean suspending production, potentially generating a substantial loss from the very get-go. Lloyd’s Register Consulting was therefore urgently brought on to demonstrate compliance and help attain the needed LNG permission.
How Lloyd’s Register helped
In order to demonstrate to the DSB and the local community that establishment and operation of the plant would be safe, we helped to develop the safety report. We assisted in creating the classification plans and in developing the required contingency and emergency plans.
We further evaluated the safety integrity levels through a SIL assessment and performed a quantitative risk analysis to estimate the risk of major accidents and 3rd party effects. The risk was evaluated according to the acceptance criteria established by the DSB.
The Quantitative Risk Assessment process for Marine Harvest ASA
The scope of the quantitative risk analysis (QRA) included the liquid and natural gas system from ship connections to the natural gas regulator cabinets. A HAZID (Hazard Identification) workshop was conducted to identify possible risk scenarios to include in the QRA and identify other safety issues that were relevant to the design process and operation of the factory.
The QRA was developed by dividing the plant into segments. These were delimited by the remotely operated valves that can isolate the segment following automatic detection of a leak or manual emergency stop. For each segment, representative leak scenarios were defined.
The consequences of a potential leak (fire, explosion, etc.) were then modelled for each representative scenario. This allowed us to calculate how far and how often hazardous scenarios were to be expected. Based on this information, we then developed the Explosion Protection Document to record the assessment of a potential explosive atmosphere in the LNG system.
The quantitative risk analysis results demonstrated that the LNG system was compliant with the DSB acceptance criteria, thus establishing that both implementation and operation of the plant boded safe and sustainable. Marine Harvest timely received the required LNG permission and operation could be started as planned – avoiding a potentially costly delay.
*What is the Seveso Directive
The Seveso Directive is the main EU legislation dealing specifically with the control of onshore major accident hazards involving dangerous substances.
The Directive provides a set of safety parameters to prevent major accidents and ensure appropriate preparedness and response should such accidents occur.
The Directive applies to more than 10,000 industrial establishments in the EU where dangerous substances are used or stored in large quantities, mainly in the chemical, petrochemical, logistics and metal refining sectors.
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