SIGMA projetor - Manual (Page 27)

DAILY INSPECTION INSTRUCTIONS
3.5
Figure 3.4 Sealed source in the exposure mode
Daily Inspection of the System
A daily inspection of the gamma radiography system for obvious defects is essential to ensure the
equipment is in a safe and proper operating condition. It is important that all radiographers perform or
supervise this inspection prior to the first radiographic exposure of the shift regardless of any previous
inspections that may have been performed that day. As an example, damage to a component of the
system may occur during transport of the equipment to the job-site. If damaged equipment were used
without detection, the result may be the inability to retract the source assembly into the exposure device
and secure it.
The results of a daily inspection should be recorded and include the date, the name of the inspector and
what specific equipment was inspected. If any defective or damaged components are discovered during
the daily inspection, the component must be removed from service and identified with a status indicator
(tag, label, or tape) to prevent inadvertent use by other radiography personnel. Defective or damaged
components must be repaired or
replaced before reuse in radiographic operations. The three main
components of the radiography system consisting of the radiographic exposure device and transport
case, remote controls and source guide tubes must be inspected in addition to accessories such as lab
stands, collimators, J-tubes, magnetic lab-stands and pipe-clamping apparatus.
Radiographers must take a proactive role in preventing incidents, by performing or directly supervising a
simple, but thorough daily inspection of the radiography system. The implications that affect safety and
the importance of the daily inspection must be emphasized and understood by the entire radiography
staff.
Daily Inspection of the Exposure Device
1 Survey the surface of the exposure device or device in the transport case to ensure the radiation level
is less than 2 mSv/hr (200 mR/hr), even when containing a source assembly with the maximum
allowable activity. This survey provides a function check of the survey instrument that it is responding
to radiation, in addition to providing the radiographer with a reference measurement that can be
compared to confirmatory surveys after terminating each radiographic exposure.
Control Cable Exposure Device
Source Assembly
Sealed Source
Remote
Control Crank
Locking
Mechanism
Shield Outlet Port Source Guide
Tubes