Double-jeopardy is NOT a discussion of (or failure of) multiple layers of protection. Nearly every scenario should have multiple layers of protection against the ultimate (unmitigated) consequence. Double jeopardy is also NOT a deviation combined with failure of a safeguard that then "lies in wait." Double jeopardy is the occurrence of two deviations or two [...]
Trouble-Shooting guides is the term many folks use to for the list of steps and decisions necessary to tale when a deviation from the normal opertion occurs. It is what an operator does to prevent a deviation from leading to an emergency shutdown or worse. (Trouble-Shooting guides are significant extensions of waht some call Operating [...]
Many (perhaps even most) EPCs and Owner companies do not really understand best practices related to risk analysis and independent protection layers (IPLs). This is unfortunate. This lack leads to a lot of wasted resources. Also, many owner companies do not implement the management systems and discipline needed to maintain IPLs once identify. It is [...]
"Are You conducting SIL assessment session along with HAZOP?" Note that this question does not include the term LOPA. We do not use LOPA during a HAZOP (unless clients make us) and yet we identify most of the SIFs and we set the needed SIL at that time (no numbers; no other analysis). We do [...]
Though consequence severity can (and is) used to decide when a LOPA is needed, the Best trigger for doing a LOPA is when the HAZOP team is confused. More than likely the HAZOP team is Not confused even for high severity. For instance, we were on a high severity ($100,000,000 loss potential, multiple death) consequence [...]