Nomenclature
A system performance loss factor (dimensionless)
B financial loss factor (dimensionless)
C human health loss factor (dimensionless)
D environmental loss factor (dimensionless)
AR area under the damage radius (m2)
AD asset density in the vicinity of the event (up till 500 m radius) ($/m2)
PDI population density in the vicinity of the event (up till 500 m radius) (persons/m2)
IM importance factor can be derived from Fig. 4 (dimensionless)
i number of events, fire, explosion, toxic release, etc.
t failure time (h)
h characteristics life of the component (scale of Weibull distribution) (h)
β slope or shape factor of Weibull distribution
F(t) failure probability function
PDF1 population distribution factor (dimensionless)