Safeti Frequency Analysis Application
In order to asses the risk associated with the operation of any hazardous facility like a process plant, refinery, LNG terminal or topside plant, you need to be able to accurately predict the frequency with which hazardous events will be realised. The Safeti Frequency package includes a number of tools which will help you assess the frequency of loss of containment events.
When performing Quantitative Risk Assessment (QRA) you first identify your representative failure cases for your pipes, vessels and other process equipment. Secondly you assess the possible consequence of each possible outcome. Finally you need to predict as accurately as possible the frequency with which these release scenarios will occur.
Since risk is the product of frequency and consequence, estimating the frequency with which events occur is as important as accurately predicting the consequences to the overall risk. High consequence events which occur infrequently may contribute as much risk as frequent events which have smaller consequences. So unless event frequencies can be estimated accurately, one cannot expect to perform accurate risk calculations.
Estimating frequency includes looking at historical records for individual items of equipment or components, like pipes, flanges, valves, and aggregating frequencies for each component into an overall frequency to be used in risk calculations. Industry standard data sets are available in the Safeti Frequency package. These are DNV’s World Offshore Accident Databank (WOAD) and the UK HSE Hydrocarbon release database along with tools for using these data sources to estimate overall frequencies.MODULES:
