PHA to LOPA: Part II
Tuesday, August 30, 2011Viewed 4557 times
Continued from Part I
In some cases the screening methods will indicate that a SIF is needed. These screening methods can be designed to determine how many orders of magnitude risk reduction is needed, allowing a required SIL to be documented for a particular SIF. The screening method used to establish compliance with corporate risk criteria should be relatively conservative to allow for the lack of accuracy in the methods. The approach A LOPA rules inherently make it a conservative approach and is well suited to determine SIL requirements. For any SIF identified, there needs to be a safety requirement specification (SRS) developed and a SIL verification performed and documented to ensure that the…
Layer of Protection Analysis (LOPA) • (0) Comments • Permalink