Risk Assessment -Radiography

First off, I don't do radiography, but I do work around it. The important thing to consider is the Gamma "sun-shine", the energetic rays can do damage at a distance. Be aware of pathways that can cause exposure to personnel not in the immediate area. Barricades and radiological hazard signs need to be posted, in addition to verbally alerting ALL personnel on site of the radiography areas and times, prior to commencing.

I would also add , that this not something to try without proper training.

Regarding the Ir¹⁹² itself an additional consideration, quote from wikipedia:used in industrial radiography, particularly for non-destructive testing of welds in steel in the oil and gas industries; iridium-192 sources have been responsible for a number of radiological accidents.Be very careful, are you doing this in house or is there a sub-contractor?

One VERY important factor is to maintain custody of the ¹⁹²Ir.

Here is a link to an information notice from the U.S.NRC regarding an incident where an individual took a ¹⁹²Ir source to his home (was being used to radiograph pipe welds). His entire family was exposed, and several members died.

There is a short Wiki article regarding this incident.

I think the above adequately covers the "guests" topic.

Job Safety Analysis of Radiographic Testing. Please prepare a checklist similar to one as follow: 1) Source strength should be known to all involved in shooting. 2) Each individual involved in Radiography must be equipped with Film Badge. 3) Radiographic camera be of type 'Remote Control'. 4) Radiographic Area be cordon off with the help of Radiation Beeper for size of ring equipped with rope and warning sign of Radioactivity be hang on the rope. 5) Deploy watch and ward with whistle to keep away uninvolved person. 6) Radiographer of ASNTC level II must be present with the shooting team. 7) Make shift of two technician to run for putting off the camera and remove films. 8) Dose-o-Meter be checked regularly by the Radiographer. 9) Radiography be carried out in remote place where access to only concerned person be allowed. 10) Use alarm watch to run to put camera off set to required exposure time. 11) Distance to radiation source is much more effective than shielding.