MONITORING FOR CONTAMINATION
While handling unsealed radioactive materials, you should monitor your hands frequently
as you work. Monitor your hands, feet, sleeves, and lab coat when leaving the work station
or laboratory. It is common to find contamination on the lab coat where you may be leaning
against your work station.
Contamination Monitoring Equipment
cannot be detected with a thin-window G-M survey instrument. For these isotopes,
wipe tests, which are counted in a liquid scintillation counter, are required.
IDENTIFY the purpose and use of personnel contamination monitors.
Contamination-monitoring equipment is used to detect radioactive contamination
of personnel and work areas.
2. Selection of proper survey instrument
Most hand-held survey instruments are calibrated to a Cesium-137 source.
Correction factors for the specific radionuclide being monitored should be known
when surveying. Often the survey instrument will over or under respond when
monitoring for beta or alpha radiation.
3. Pre-operational Checks
Perform pre-operational checks before work:
Confirm calibration is current.
Verify that battery is OK.
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