Fluke Biomedical 943-27 Detector - Manual (Page 19)

Maintenance, Calibration and Troubleshooting
Calibration
4
4-5
Source Wipe Test
Due to the amount of activity in each source, the Current Mode Beta source set requires a USNRC or
Agreement State Byproduct Material license. To guard against leaks of radioactive material, or possible
contamination, the regulatory agency generally requires a wipe test be performed at an interval not to
exceed six (6) months for each source.
WARNING
The wipe test of the source is made with the end cap
removed. Any part of the body in front of the open
source may be exposed to high radiation fields. Do
not test quickly to minimize exposure. Direct the open
end away from personnel and wear safety glasses.
The activity is covered with a 2 mil Kapton window and
is sealed into the aluminum mount. DO NOT TOUCH
the source window with anything, including the wipes.
Wipe Test Procedure:
1. Procure a long handled Q-tip type cotton swab and moisten it with alcohol.
2. Remove the small end cap. Direct the open end away from any personnel.
WARNING
Do not swab the source window. It is a 2-mil Kapton window
that may easily be broken.
3. Holding the swab, quickly swab the internal surface of the cylinder.
4. Replace the small end cap. Return the holder to storage.
5. Measure the swab using a detector capable of detecting 0.005 microCuries or
less and record the data.
6. If more than 0.005 microCuries of activity is detected, notify the cognizant plant
Radiation Safety Officer or Health Physicist.