Risk based inspection planning
Responsible operators have been recognizing the importance of implementing risk-based integrity management programs to mitigate the inherent uncertainty in the life of field risk profile of subsea critical systems. Such programs are based on a systematic assessment of the potential failure modes and development of risk mitigation plans including specification of inspection and monitoring, and plans to quantify actual performance and identify anomalies.
The process commences by collating sufficient data to determine the as built condition and the operating parameters; these can be used to determine safe operating limits which act as trigger points in initiating intervention requirements. Legislative (depending on location of operation), operator and partner requirements determine a level of prescriptive requirements; however, the majority of inspection, mitigation and monitoring requirements are defined based on the determined risk level to system components.
| Criticality | Probability of failure | ||||
| Negligible | Low | Med | High | ||
| Consequence | High | Medium | High | Very High | Extreme |
| Med | Low | Medium | High | Very High | |
| Low | Negotiable | Low | Medium | High | |
| Zero | 0 | 0 | 0 | 0 | |
