Operational Instructions - QSA Global SENTINEL SENTRY 330 Manual

2.2 Operational Instructions

It is essential that the 5 STEPS set out below are followed in the correct order to
ensure safe operation and compliance with regulations.
STEP 1 Gamma-ray source projector Survey
STEP 2 Connecting the Source Guide Tube(s)
STEP 3 Connecting the Remote Control Cable
STEP 4 Projecting and Retracting the Source Assembly
STEP 5 Dismantling Equipment
STEP 1
Gamma-ray source projector Survey
Protection against radiation incidents begins with proper survey meter use. Operators must inspect
the survey instrument to verify that it is operating properly in accordance with 10 CFR 34.31 and
applicable company specific operating procedures.
Check the operation of the survey meter by measuring the radiation level at the surface of the
gamma-ray source projector. The radiation level measurement should not exceed 2 mSv/hr (200
mR/hr) on any surface of the gamma-ray source projector. Use this measurement for verification
surveys of the source assembly's return to the fully shielded/secured position within the gamma-ray
source projector after each radiographic exposure.
(Perform a daily inspection of all equipment used according to the daily inspection section.)
STEP 2
Source Guide Tube (projection sheath) Layout
Ensure all source guide tubes that will be utilized have received a daily inspection according to the
daily inspection section of this manual. Position and secure the source stop (exposure head) of the
terminating source guide tube at the radiographic focal position using the tripod stand and swivel
clamps or some other secure and suitable means.
Ensure that a source stop (end stop) is in place on the terminating source guide tube.
Use a collimator (beam limiter) to limit the primary beam in unwanted directions.
Determine where the gamma-ray source projector will be positioned and lay out the source guide
tubes as straight as possible, with no bend radius less than 20 in (0.5 m) to avoid restricting the
movement of the source assembly.
Make sure that the source guide tubes do not contact any heated surface greater than 140°F (60°C).
Avoid any risk of crushing the source guide tube(s) by falling objects, vehicles or doorways during
set-up and during radiographic exposure.
QSA Global, Inc. 
WARNING
40 North Avenue Burlington, MA 01803
Operations Manual  MAN-038 March 2019
 888.272.2242  781.272.2000
 Page 16 of 100
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