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SECTION II- OPERATIONAL SAFETY PRECAUTIONS
Instruments
The radiographer and radiography assistants must at all times wear a film badge or TLD and pocket dosimeter with a range of
0-2 mSv (0-200 mRem). Regulatory requirements in the USA also require that an audible alarm ratemeter be worn at
temporary jobsites. Specifically, those locations that are not permanent radiographic installations equipped with functional
door interlocks and audible/visual alarms.
Radiographers in the USA must also have a survey meter capable of measuring in the range from
20 µSv/hr (2 mR/hr) up to 10 mSv/hr (1,000 mR/hr). Canadian regulations require that survey meters used for industrial
radiography be capable of measuring from 2 µSv/hr (0.2 mR/hr) and up to 100 mSv/hr (10 R/hr). In any regulatory
jurisdiction, always verify survey meter requirements affecting the range and calibration requirements prior to engaging in
industrial radiography operations.
An audible ‘chirper’ pocket alarm may be required in some countries.
Restricted Area
Radiography must be performed only in a restricted area that is marked with the appropriate radiation warning signs, and
secured against unauthorized entrance.
Distance
Since the source emits high levels of radiation it is good practice to operate the system from as great a distance as possible.
Shielding
Whenever possible, situate the radiographic exposure area in a room with suitably thick walls, floor, ceiling and doors.
Surveillance
Only trained and qualified radiographers or assistants working under their direct supervision may operate radiography
systems. The radiographer must be physically present at the site, and able to control and limit access to the restricted area.
Locking
Keep the exposure device locked while assembling the system and when not being used to perform radiography. Locked is
defined as the exposure device's lock is fully engaged with the key removed. Store the key in a secured location.
Fixture Use
If the fixture kit is to be used, the fixture components must be inspected for damage prior to exposure. Secure the fixtures and
the Model 989 exposure device to the pipe tightly to prevent movement.
Summary of Contents for 989
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