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3.4 Daily Inspection of the Gamma-Ray Source Projector
a. Survey the surface of the gamma-ray source projector 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.
b. Inspect the labels on the gamma-ray source projector to ensure they are legible and securely
attached to the unit. The warning label containing the trefoil should be legible from a distance of at
least 3 ft (approximately 1 m). This label warns the individuals in the immediate vicinity of the
presence of radioactive materials and permits them to take measures to minimize their exposure to
radiation.
The printed verbiage and the radiation symbol must be legible. The trefoil symbol becomes the
warning for those individuals who cannot read or understand the written warning, 'Caution or Danger,
Radioactive Material'. Inspect the legibility and attachment of the source identification tag that
describes the radioactive source contained within the gamma-ray source projector.
regulatory jurisdictions, a legible label that provides the owner's name (company name), address and
telephone number must also be affixed onto the gamma-ray source projector.
c. Inspect the gamma-ray source projector'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. Insert the protective cover into the storage
bracket located above the lock mechanism during use of the gamma-ray source projector. Ensure
the lock mechanism plate is secured to the projector housing with the four bolts and one tamper-proof
screw.
d. Inspect the outlet port for damage and for smooth operation by operating the outlet port cover. Verify
that the outlet port cover rotates smoothly and that the mechanism is not clogged with dirt, grease or
sludge. Also ensure the outlet port mechanism plate is secured to the projector housing with the four
bolts and one tamper-proof screw.
3.5 Daily Inspection of the Source Guide Tube(s)
a. Remove the protective covers from the swaged fittings on the source guide tubes. Inspect both
swage fittings to ensure the threads are not stripped or clogged with dirt, grease or sludge. Inspect
the ears on the bayonet fitting to ensure they are not bent, broken or excessively worn. Inspect the
swivel bayonet nut to ensure the threads are not stripped or clogged with material and that it rotates
freely. Verify the identification marking (110 or 330) on the bayonet being used is for the appropriate
gamma-ray source projector.
b. Inspect each length of source guide tube(s) that will be used for cuts, inward dents and heat damage.
The inspection is primarily a visual one, but it should include the radiographer using his hands to feel
for the inward dents. This is necessary due to the fact the outer material of the source guide tube is a
flexible waterproof material that can mask dents. During a visual-only inspection, a dent in the source
guide tube may retain a circular appearance on the exterior, while having an inward dent in the
metallic conduit directly below the waterproof material. This type of masked dent can be felt by the
radiographer's hands. Dents in the source guide tubes are the major cause of source hang-ups.
QSA Global, Inc.
40 North Avenue Burlington, MA 01803
Operations Manual
MAN-038 March 2019
888.272.2242
781.272.2000
Page 31 of 100
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qsa-global.com
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