SAPHYMO MiniTRACE CSDF - Figure 8: Wipe Test Measurement

Instruction Manual for MiniTRACE CSDF
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Page 16 08/2012
Figure 8: Wipe test measurement
Calculation of the final result:
back gound
theoftotal
valuemeasuredvaluemeasuredcmBqvaluenet −=]/[
2
Note: To determine the background value put the CSDF in the measurement holder. It
is not necessary to use a new (uncontaminated) wipe test sample; put only the
measurement cup in the measurement holder.
Example:
Measurement result of the background: 5 Bq/cm
2
Measurement result of surface measurement: 105 Bq/cm
2
Net value = 105 Bq/cm
2
– 5 Bq/cm
2
= 100 Bq/cm
2
][
2
5.15]/[
2
2
cmareawiped
cmxcmBqvaluenet
resultFinal =
Example:
Net value = 100 Bq/cm
2
Wiped area = 100 cm
2
Area of the window of the GM-detector: 15.5 cm
2
2
2
2
/5.15
100
2
5.15/100
cmBq
cm
cmxcmBq
resultFinal ==