*6.5.2. Results*

Different ranges of conditional explosion-probability PE are depicted in Figure 12. The denotation of the different ranges of the explosion event probability PE, which is normalised on 1m2, is as follows: red area (> 1E-07/m2), orange area (≤ 1E-07/m2), yellow area (≤ 5E-08/m2), green area (≤ 1E-08/m2). The methods, number of trials, the simulation time and the results like mean value, variance and figure of merit (fom) are listed in Table 5.


**Figure 12.** Tank-lorry accident - ranges of conditional explosion event probability PE/1m2

**Table 5.** Tank-lorry accident - conditional probability of an explosion event within the plant area with radius rP

As the different Monte Carlo methods (Table 5) are compared it can be found out that most solutions fit a mean about approx. 8.0E-04 which verifies the results as well as the adopted different Monte Carlo algorithms. If the variance and the figure of merit are regarded the MCS in combination with the ffe and biasing techniques is the most efficient approach.
