Sentinel 989 - Section IX - Leak Testing

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SECTION IX - LEAK TESTING
The source assembly used in the Model 989 must be leak tested for removable radioactive contamination at intervals not to
exceed six months or at intervals specified by local Regulatory Authority requirements. This can be accomplished using QSA
Global, Inc. Model 518 Leak Test Kit or equivalent test kit.
This test must be performed in a properly secured Controlled Area. The individual performing this test should wear a direct
reading pocket dosimeter and either a film badge or thermoluminescent dosimeter. The individual should also use a properly
calibrated and operable radiation survey instrument.
1. Verify that the exposure device is locked. Verify that the source assembly is in the proper shielded storage position by
surveying the exposure device at the surface and at 1 meter (40 inches) from the surface. The radiation levels should not
exceed 2 mSv/hr (200 mR/hr) at the surface or 100 µSv/hr (10 mR/hr) at 1 meter (40 inches) from the surface when the
device is loaded to its maximum capacity.
2. Dampen the wipe test swab with EDTA solution. Unlock the plunger lock and remove the protective dust cap. Wipe the
area around the lock mechanism and sealed source connector that protrudes from the lock mechanism.
3. Place the wipe test swab in the plastic envelope.
4. Set the survey meter on its most sensitive range and determine the background radiation in a low background area.
Move the wipe test swab towards the meter and observe the radiation level indication.
5. If there was no measurable increase above the background radiation level, place the plastic envelope in the mailing box
and send to QSA Global, Inc. (In Canada, arrange for the wipe to be sent to Sentinel
TM
- QSA Global, Inc. by courier)
Be sure to complete and return the identification sheet.
6. If the meter indicates an increase above the background radiation level, DO NOT MAIL OR SEND THE WIPE TEST
PATCH. Contact Sentinel
TM
-QSA Global, Inc. for further instructions.