- 21 -
SECTION IV- DAILY INSPECTION INSTRUCTIONS
A.
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 the daily 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 components of the radiography system consisting of the radiographic exposure device and
transport case, standard or pneumatic remote controls and mounting accessories such as the fixture kit components, lab-
stands and pipe-mounting apparatus must also be inspected daily prior to use.
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.
B.
Daily Inspection of the Model 989 Exposure Device
1) Remove the Model 989 exposure device from the transport case, and
survey the surface of the exposure device 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 an operability 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 with confirmatory surveys after terminating each radiographic exposure.
2) Before the first radiographic exposure, perform a visual inspection of the device to ensure all fastening hardware on
the locking mechanism are present and secure. Verify the device’s engraved labeling and warning symbol is clean
and legible. Verify the source identification tag is present and is legible. Remove the protective cover and perform
the no-go gauge checks of source assembly connector according to the instructions described in “assembly before
use”. If operation is difficult or unusual during a test operation of the Model 989 exposure device (see Operation
Section), return the source to the stored position. Perform a radiation survey of the equipment and secure the
equipment according to the “disassembly after use” instructions. The system must be serviced before use in
radiographic operations.
3) Inspect the exposure device’s locking mechanism to ensure the protective covers are installed over the source
assembly connector. Inspect the plunger lock to ensure the lock will engage when the plunger is depressed and the
key is removed. Grasp the entire locking mechanism with one hand, and try to move the lock to determine that the
screws have not loosened due to vibration. Unlock the plunger lock, and remove the protective cover.
4)
Inspect the stainless steel exposure device main body for damage. Inward dents or perforation of the steel shell near
the beam port may cause damage to the tungsten collimation. Clean any dirt, grease or sludge that may be on the
exposure device.
Summary of Contents for 989
Page 1: ...MAN 037 October 2017 ...
