The Hazard and Operability (HAZOP) study approach, and other similar methods, are very effective ways to qualitatively identify a comprehensive set of accident scenarios for a facility. If these analyses are modified to incorporate a simple system for evaluating relative risk, such as an order-of-magnitude scoring system, the resultant study can be a very powerful input to developing risk reduction strategies. By adding the concept of Risk Reduction Worth evaluations for all accident Causes, Safeguards, and proposal Action Items, an analyst can then formulate a strategy to select the minimal set of risk reduction actions that maximizes risk reduction. One strategy for doing this involves the iterative evaluation of RRW after postulation of risk reduction actions, until the residual risk reaches a tolerable value, termed Cumulative Risk Benefit Analysis. This concept was developed for the evaluation of a set of pipeline pumping stations, and provided valuable insight into how to reduce risk in a sensible, prioritized fashion.
Revised: September 5, 2007 |
Published: April 25, 2007
Citation
Leverenz F.L., and J. Aysa Jimenez. 2007.Cumulative Benefit Analysis for Ranking Risk Reduction Actions. In Proceedings of the 2007 Spring National Meeting of the American Institute of Chemical Engineers, April 22-27, 2007, Houston, Texas. Topical Conference: 9TH Process Plant Safety Symposium (PPSS), 86a (14 pages). New York, New York:American Institute of Chemical Engineers (AIChE).PNNL-SA-53675.