Jul 24, 2022 · An F-N curve is a graphical representation of the level of societal risk generated by some activity or project.

It is usually presented as a two dimensional relationship between frequency and cumulative severity of outcome, called an FN curve. This is best understood from a simple example. Consider a major hazard site storing a compressed liquefied toxic gas, such as chlorine, in a bulk tank.

Section 2.4.2 introduced the F-N information about societal risks. This appendix first illustrates the development of an F-N curve to show historical data or QRA results, and then concludes with a discussion of the use of F-N curves to communicate risk criteria.

F-N curves: Curves relating the probability per year of causing N or more fatalities (F) to N. This is the complementary cumulative distribution function. Such curves may be used to express societal risk criteria and to describe the safety levels of particular facilities.

An F-N curve is a graphical representation that plots the cumulative frequency (F) versus the number of fatalities (N). This curve helps assess and compare risks by incorporating multiple scenarios into a single figure, called a F/N curve.

As introduced in the Definition of Risk Section, the risk curve is useful for evaluating the expected damages for a wide range of scenarios. In contrast to the total expected damages, it allows the comparison of relative magnitude of probability of occurrence and associated consequences.

Aug 17, 2009 · Construction of an F-N Curve to Display Data. Presentation of Societal Risk Criteria. F-N Criteria Slope Selection

The f-N curves are usually a graphic representation of the cumulative frequency distribution for the number of fatalities in the risk calculations that have been performed, see also section A1.3. Aspect Advantages and disadvantages of f-N curves. Suitability for decision support.

Mar 28, 2019 · This chapter describes the implementation process of the F-N curve, which makes possible to represent the societal risk and subsequently verify its acceptance with respect to the ALARP criterion.

F-N curves were originally developed for nu- clear hazards ( Kendall et al. 1977), where the pur- pose was to illustrate risk tolerance thresholds reflecting societal aversion to multiple...