Dropped Object Study (offshore)
The scope of this study is to assess the hazards arising from lifting operations during the normal operating mode and maintenance, leading to possible loss of containment and asset damage.
The objectives of the study are to:
- Identify the type of objects likely to be handled during normal production operations
- Identify the type of objects likely to be handled during maintenance
- Evaluate the types of dropped objects for each phase
- Assess the existing dropped object protection on handling areas on each platform, including critical equipment and over live pipework
- Calculate the drop frequency of the objects
- Calculate the impact energies of each object
- Calculate the probability contours for impact at various energy levels
The hazards from normal lifting operations are assessed in terms of hazards to structures and process systems (risers and subsea pipelines within 500m of the platform are also covered). These are the hazards that will have greatest potential effects on personnel via direct impact, structural collapse or escalation to process fire or blast events.
The hazards of dropped objects from lifting operations on essential safety systems are not included in the assessment. The effects of such events are considered not to pose a direct hazard to personnel except when a separate Major Accident Hazard event (MAH) occurs at the same time that requires the use of the impacted safety system. The likelihood of such a MAH and a crane operation dropping an object onto an essential safety system occurring simultaneously is considered to be negligible.
The study involves the following steps:
- Description of lifting operations
- Hazard Identification
- Frequency Analysis
- Probability of Hitting Target Area on the Deck
- Impact Assessment
- Dropped Object Protection
Following the consequence analysis, the level of dropped object protection will be assessed, and recommendations made.
Dropped Object Study (offshore)
The scope of this study is to assess the hazards arising from lifting operations during the normal operating mode and maintenance, leading to possible loss of containment and asset damage.
The objectives of the study are to:
- Identify the type of objects likely to be handled during normal production operations
- Identify the type of objects likely to be handled during maintenance
- Evaluate the types of dropped objects for each phase
- Assess the existing dropped object protection on handling areas on each platform, including critical equipment and over live pipework
- Calculate the drop frequency of the objects
- Calculate the impact energies of each object
- Calculate the probability contours for impact at various energy levels
The hazards from normal lifting operations are assessed in terms of hazards to structures and process systems (risers and subsea pipelines within 500m of the platform are also covered). These are the hazards that will have greatest potential effects on personnel via direct impact, structural collapse or escalation to process fire or blast events.
The hazards of dropped objects from lifting operations on essential safety systems are not included in the assessment. The effects of such events are considered not to pose a direct hazard to personnel except when a separate Major Accident Hazard event (MAH) occurs at the same time that requires the use of the impacted safety system. The likelihood of such a MAH and a crane operation dropping an object onto an essential safety system occurring simultaneously is considered to be negligible.
The study involves the following steps:
- Description of lifting operations
- Hazard Identification
- Frequency Analysis
- Probability of Hitting Target Area on the Deck
- Impact Assessment
- Dropped Object Protection
Following the consequence analysis, the level of dropped object protection will be assessed, and recommendations made.