Ventilation equipment can be seen rising up the side of the building. Also shown is the main airlock into the building and the electrical and water pipe trench.
The normal extract vent system is the duct on the left side of the building coming from the yellow-housed filters, which is monitored for radiation.
The air would cycle a complete refresh of the building once per hour.
Reactor Containment Building and Trench is part of the Lost Collective 'ANSTO HIFAR' series.