Also known as SCAR or Small Controlled Area Radiography is the concept of controlling the radiation utilized for RT allowing for radiographic inspection without restrictive shooting windows (24/7 radiography concept), in close proximity to other trades, and without impacting critical sensor systems.
A 6 ft (~2 m) exclusion zone has clear benefits in many applications:
Radiography can be performed in close proximity to other trades such as welders, pipe fitter, etc. during turnarounds or outages rather than clearing the area or shooting in windows
Nearby processes utilizing nuclear gauges or necessitating UV flame detectors can be left online and safely monitored.
Rope access technicians (RATs) can minimize their exposure while remaining in close proximity to the test location.
Hot Work Permits issued and required by most plant safety managers are likely to be easier to obtain based on the vastly reduced zone of influence and repeatable setup geometries.