Quantitative Risk Assessment (QRA) - Making Sense of the FN Curve and Creating a Risk Metric

Facility Siting is the study of ensuring that personnel and population are safe from chemical hazards. While there are differing levels of complexity of analysis, the QRA is the most highly detailed offering. The QRA is an analysis of every major piece of equipment and significant length of piping where hazardous chemicals are present. The QRA will analyze the consequences of failure and model that with an estimated frequency of failure. It will also apply conditional modifiers such as meteorological conditions and likelihood of ignition.

To analyze the risk data from a QRA, several companies will employ an "F-N" Curve. The F-N Curve,