Escape and evacuation of operators in oil and gas facility is one of the most important points in the design phase of facility, and also important in the operation and maintenance plan. Furthermore, in recent facilities such as offshore facility and onshore modularized facility, process areas become more complicated and congested. In those facilities, adequate escape routes and means of escape (ladder, stairs, ramp, etc.) are provided for operator safe escape and evacuation in all situation, i.e., normal situation, accidental situation, and maintenance situation. In some cases, Escape, Evacuation and Rescue Analysis (EERA) are conducted in design phase in order to confirm that the designed escape and evacuation facilities are enough safe for operator escape and evacuation. However, there is no simulation program which can simulate realistic operator escape and evacuation behaviour in the oil and gas facilities. The characteristics of operators escape and evacuation in the oil and gas facilities are usage of ladder, congested areas, situation change in accident scenario, barricade in maintenance period, etc.
In this research, first, the specialized escape simulation program is developed based on the existing escape simulation for public area escape by the University of Tokyo. To develop the specialized escape simulation for oil ang gas facility, experimental test to obtain specific parameters of oil and gas facilities escape is conducted. Second, using the developed escape simulation program, case studies are conducted for several maintenance plans and propose the evaluation method of the maintenance planning from escape route aspect.