The reactor building requires airlocks for personnel entry. This passage is the emergency exit. Each Personnel Airlock Door (PAL) features double airlock doors. There are 3 of these Personnel Airlock Door to access the reactor building.
The containment building is engineered to maintain a negative pressure relative to the outside atmospheric pressure as an added protection to prevent leaks.
Basement Emergency Airlock is part of the Lost Collective 'ANSTO HIFAR' series.