Probabilities for immediate ignition, pool fire given a jet fire and an explosion given an ignition in a congested region can be specified.
Ignition probability models can be assigned to each release which are based on the IOGP ignition probability datasets derived from the EI work.
A user defined frequency option is also available which doesn’t use the ignition models and bypasses the SAIPH event tree. Note that all consequences assigned a user defined frequency will have the same frequency.
