Document type
Download 0.73 Mb. View original pdf
|
| 7.4.6 ALARP Assessment 7.4.6.1 Safety Critical Elements For those Safety Critical Elements that can be readily altered as the design progresses and do not have a fundamental impact on the layout, or design, only the fact that they have been identified as safety critical is required to be demonstrated. Examples of this include positions of exit points from a boundary fence on onshore petroleum infrastructure (which maybe important, but can usually be moved) and emergency lights and liferaft locations offshore. For those Safety Critical Elements that are fundamental to the design, the high level performance of the SCEs must be given in quantitative terms wherever possible and should demonstrate how those choices that have been made in relation to SCEs are ALARP. If this performance is not critical to the design at this stage and does not have a material effect on the risk, then the broad process for deciding this should be described. For the SCEs that need to be described, just those factors that cannot easily be changed during the design, or have a significant impact on the risk, should be identified. |