4, a fault tree
for the food production scenario is presented that focuses on the faults/events that would need to occur for the system to fail in its goal of producing quality products on time.
Step 7: Integrate the failure modes using fault tree
analysis (FTA) with the necessary correlation between the failure modes.
To analyze the safety instrumented system (SIS) in ammonia refrigerant compressor is used qualitative methods Fault Tree
Where Fault Tree
and other methods can get very detailed and specific, in some cases down to the level of the individual valve, Bow Tie allows for a quick overview, and can facilitate communication about risk with both senior management and the plant floor.
analysis (FTA) is used to estimate the probability of an event by establishing the potential cause-and-effect linkages and assigning a probability to these intermediate causes.
The qualitative assessment process (objective 1) required development and evaluation of a fault tree
for the failure event "excessive N is discharged to Owl Run during a runoff event" (Figure 2).
The model and the available statistical data then can be employed in fault tree
analysis to uncover single-point failures in complex system operations.
The program in the Monterrey workshop included the following: historical accident record and regulatory developments; risk assessment and risk management; overview of chemical process safety; risk mitigation and emergency response planning; hazard identification techniques; frequency assessment methods including fault tree
and event tree analysis; consequence assessment methods; source terms models; dispersion modelling; major fire and explosion hazards; vulnerability modelling; risk quantification methods; risk acceptability.
The fault tree
analysis methodology has been applied in numerous risk studies on flammable refrigerants.