Over the past ten years, the use of LOPA and other semi-quantitative single event risk assessment methodologies has advanced and become wide spread. The biggest challenge with these methods is the use and availability of frequency data and safeguard availability. General guidance is available in publications by CCPS and others, but there are many anecdotal stories of misapplication. How often does an operational procedure fail? How effective is a particular safeguard? If one check valve is not effective, how about two, or three? This session will present the most current industry guidance on frequency assessment and safeguard availability followed by a practical sharing and discussion of experiences and solutions to more effectively apply these methods. This call is for an initial presentation on the current state and additional panel members who can participate and moderate the follow-up discussions.

25th Center for Chemical Process Safety International Conference (CCPS)