Capintec CAPRAC-t - Wipe Measurement Procedures; General; Measure Background; Measure Wipes

CAPINTEC, INC. CAPRAC
®
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April 2021 WIPE MEASUREMENT PROCEDURES 10-1
CHAPTER 10
WIPE MEASUREMENT PROCEDURES
GENERAL ...................................................................................................... 10-1
MEASURE BACKGROUND ........................................................................... 10-3
Count Time ................................................................................................ 10-4
Measurement ............................................................................................. 10-5
Results ....................................................................................................... 10-5
MEASURE WIPES ......................................................................................... 10-7
Selecting Wipe Locations ......................................................................... 10-8
Measuring Wipes ....................................................................................... 10-9
Results ...................................................................................................... 10-11
GENERAL MEASUREMENTS ...................................................................... 10-13
Count Time ............................................................................................... 10-14
Set Nuclide/ROI ........................................................................................ 10-14
Measuring General Sample...................................................................... 10-17
Results ...................................................................................................... 10-18
GENERAL
The Wipe Test module is used to test for any accidental contamination that may occur in the
areas where radioactive material is handled.
Wipe measurements are divided into 5 categories:
• Work Area ................. places where radioactive material is handled, e.g. hot labs,
medicine administration rooms, storage rooms
• Unrestricted Area ...... places of free access e.g. reception desk, waiting rooms
• Sealed ...................... devices that contain a sealed radioactive source, use to
measure wipe samples from Sealed Sources to detect leakage,
for example, from a Co60 teletherapy unit.
• Package .................... measure radiation from packages
• General ..................... measure radiation levels in samples
Each category (except General) may have up to 10 default nuclides assigned. Each wipe
location may use the default nuclides for its category or may be customized.
The General category does not have any nuclides assigned to it. Refer to the GENERAL
MEASUREMENTS section on page 10-13 for instructions for assigning nuclides.
When a measurement is completed, the activity is calculated for each assigned nuclide, as if
it were the only nuclide present. The activity is also calculated for the Wipe Full Spectrum