FRI3D's scenario inspector lists the various scenarios that can be simulated . Each scenario can be associated with a certain zone and a zone may exist in multiple scenarios.

Fire scenario definition is not a trivial task since it requires knowledge and experience from the fire engineer to identify which equipment in the zone can be damaged by a fire with certain Heat Release Rate. This is where FRI3D becomes a valuable tool since it allows a quick simulation of multiple fire bins (i.e., fire scenarios). Each fire bin scenario run will demonstrate equipment that is failed or not failed due to the postulated fire. This quick (matter of minutes) exercise would allow the fire engineer to select the number of fire bins for a given fire zone; each bin associated with a set of equipment (i.e., Target Set) affected by each scenario.

The components which are part of a compartment/zone are placed in the fire scenarios, or bins, according to the fire with significant enough Heat Release Rate to fail those components. Multiple fire scenarios can be defined; each scenario characterized by a specific targets set, Heat Release Rate, severity factors, and non-suppression probability. Therefore a given scenario can affect multiple compartments if the given scenario propagates the fire to other compartments.

Scenario Creation

A new scenario is created from the zone inspector by right mouse click on the COMPARTMENTS and Add Scenario as indicated by the following image

COMPARTMENTS -> New Scenario

Scenario List

Whether an existing scenario is loaded or a new scenario created the following image lists the scenario inspector

Scenario List

Scenario Contents

The scenario has very similar contents like the zone inspector but contains only elements which are part of this scenario

Scenario Contents

Full-Room Burnout Scenario

A full-room burnout assumes that everything in the compartment is lost. FRI3D can create such a scenario directly, without a fire simulation.

Right-click a scenario in the Scenario Inspector and choose Full-Room Scenario. FRI3D creates a new scenario named <scenario>_FullRoom beside it:

• It covers the same compartment(s) as the scenario you right-clicked.
• Every component, raceway and cable in those compartments has failed at t = 0.
• The basic events linked to those items are triggered, so the scenario is ready for the PRA calculation.
• The original scenario is unchanged, and stays the active one. A message gives the new scenario's name and the number of items failed.

If the name is already taken, FRI3D adds a number to it. The item is disabled on a scenario that is already a full-room burnout scenario.

Failure Method. Each failed item shows a read-only Failure Method property. It reads Manual for a full-room burnout. For a simulated scenario it shows the method that computed the failure, for example THIEF, HeatSoak or MaxTemp.

Notes

• A full-room burnout scenario copies only the compartment links. It has no fire sources, so it is not meant to be simulated.
• If you do run CFAST or FDS on it, the simulation's results replace the full-room failures.