Integrated HSE ALARP Assessment - Reducing HSE Risks and Impacts in the Same Processes

Valeur, Jens Rosendal

doi:10.2118/170445-ms

Cited by 4 publications

(1 citation statement)

References 9 publications

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“…The consequences of the platform collapsing are loss of life, injury to people, damage to assets and environment and damage reputation. The bow-tie is one health, safety, security and environment (HSSE) tool support for as low as reasonably practicable (ALARP) [55].…”

Section: Wave-in-deck Load and Reserve Strength Ratiomentioning

confidence: 99%

Structural Integrity of Fixed Offshore Platforms by Incorporating Wave-in-Deck

Azman¹,

Husain²,

Zaki³

et al. 2021

JMSE

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The structural integrity of offshore platforms is affected by degradation issues such as subsidence. Subsidence involves large settlement areas, and it is one of the phenomena that may be experienced by offshore platforms throughout their lives. Compaction of the reservoir is caused by pressure reduction, which results in vertical movement of soils from the reservoir to the mud line. The impact of subsidence on platforms will lead to a gradually reduced wave crest to deck air gap (insufficient air gap) and cause wave-in-deck. The wave-in-deck load can cause significant damage to deck structures, and it may cause the collapse of the entire platform. This study aims to investigate the impact of wave-in-deck load on structure response for fixed offshore structure. The conventional run of pushover analysis only considers the 100-year design crest height for the ultimate collapse. The wave height at collapse is calculated using a limit state equation for the probabilistic model that may give a different result. It is crucial to ensure that the reserve strength ratio (RSR) is not overly estimated, hence giving a false impression of the value. This study is performed to quantify the wave-in-deck load effects based on the revised RSR. As part of the analysis, the Ultimate Strength for Offshore Structures (USFOS) software and wave-in-deck calculation recommended by the International Organization for Standardization (ISO) as practised in the industry is adopted to complete the study. As expected, the new revised RSR with the inclusion of wave-in-deck load is lower and, hence, increases the probability of failure (POF) of the platform. The accuracy and effectiveness of this method will assist the industry, especially operators, for decision making and, more specifically, in outlining the action items as part of their business risk management.

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Section: Wave-in-deck Load and Reserve Strength Ratiomentioning

confidence: 99%

Structural Integrity of Fixed Offshore Platforms by Incorporating Wave-in-Deck

Azman¹,

Husain²,

Zaki³

et al. 2021

JMSE

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Alara Methodology for Reactor Building Shielding Design in HPR1000 PWR

Zeng¹,

Zhou²,

Huang³

et al. 2023

Springer Proceedings in Physics

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ALARP Methodology Used for BAT Environmental Impact Reduction

Valeur

Ruggiero

2016

SPE International Conference and Exhibition on Health, Safety, Security, Environment, and Social Responsibility

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Demonstrated use of Best Available Technology (BAT) is the guiding principle with respect to environmental performance when designing offshore installations. The paper shows how the well-established methods used for demonstration of safety risk reduction of a level As Low As Reasonable Practicable (ALARP) can be used for demonstrating BAT.The BAT principle specifies that the environmental impacts shall be reduced as much as the economically and technically viable solutions allow. The criteria for demonstration environmental impact reduction are very similar to the criteria used for demonstrating risk reduction to ALARP. The paper explains how the well-established methodology for identifying hazards, assessing risks and demonstrating ALARP can be used for identification of environmental aspects, assessment of environmental impacts and demonstrating BAT. Examples of the use of the methodology are provided.The methodology has been tested for carrying out a BAT assessment for a combined drill and production offshore installation. A BAT review workshop was carried out using the same methods as when carrying out a Hazard Identification (HAZID) workshop and an ALARP workshop. The participants were mainly technicians and safety people well familiar with the safety risk reduction concepts. This made the concept of BAT easily understandable for everybody and facilitated an efficient workshop execution.Also, the use of comparable concepts makes it straightforward to identify where possible conflicts between environmental impact reduction and safety risk reduction existed. In that way it could be insured that the environmental impact reduction measured did not compromise the overall safety of the installation.The new EU Offshore Safety Directive (2013/30/EU) requires the risk of major environmental accidents to be included in risk analyses (HAZID's, Quantitative Risk Assessments (QRA's)) for offshore installations. This is a consequence of the Deepwater Horizon accident in the Gulf of Mexico in 2010, which drew attention to accidents including major safety as well as environmental consequences. The integrated approach to ALARP and BAT assessment described above fits very well with the requirements of the EU Offshore Safety Directive and with similar developments in other regions of the world.The concept of using methods developed within the safety and risk reduction field when identifying environmental aspects, assessing environmental risks and demonstrating BAT is generally applicable when carrying out environmental assessments of equipment and operational modes. The main advantages are the familiarity of the methods amongst technical and safety personnel, and the possibility of carrying out environmental risk analysis and safety risk analysis in the same, or in parallel, processes. In that way, all HSE risks and impact reductions can be balanced for the benefit of the overall HSE performance.

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Integrated HSE ALARP Assessment - Reducing HSE Risks and Impacts in the Same Processes

Cited by 4 publications

References 9 publications

Structural Integrity of Fixed Offshore Platforms by Incorporating Wave-in-Deck

Structural Integrity of Fixed Offshore Platforms by Incorporating Wave-in-Deck

Alara Methodology for Reactor Building Shielding Design in HPR1000 PWR

ALARP Methodology Used for BAT Environmental Impact Reduction

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