For your immediate review, please download the latest free resource paper from PII, titled Understanding IPL Boundaries, written by Arthur M. Dowell, III, P.E. - PII Principal Engineer & Instructor, and being presented at the 14th Global Congress on Process Safety in Orlando, Florida. http://www.process-improvement-institute.com/_downloads/Understanding_IPL_Boundaries_Paper_Dowell_-_Final.pdf From the Abstract: Layer of protection analysis (LOPA) is a [...]
For your immediate review, please download the latest free resource paper from PII, titled LOPA: Performed When and by Whom, co-written by Arthur M. Dowell, III, P.E. - PII Principal Engineer & Instructor, and William G. Bridges, PII President, and being presented at the 14th Global Congress on Process Safety in Orlando, Florida. http://www.process-improvement-institute.com/_downloads/LOPA_Performed_when_and_by_whom_-_FINAL.pdf From [...]
Well, that depends on what you call QRA. Some companies (the folks they have taught) define QRA as only the high level risk assessment that may be performed at the early design phase of a project to make large siting and fire protection (and other mitigation) decisions. LOPA does not replace that specific QRA. But [...]
Do Not believe the math as black and white or as accurate. When we accept a risk of 10-3 per year per facility, we are not necessarily saying we accept 1/10 deaths per year for the facility... we are actually guessing at both factors. 1) The factors we use for LOPA (and for SIF need [...]
