With respect to determining contamination levels using an ion chamber
instrument, there appears to be two schools of thought:
1. The ion chamber open window reading in mR/h is converted to dpm
according to the following relation ship:
1 mR/h = 50 kdpm
2. The difference of open window minus closed window is multiplied
by the BCF and the result is converted to dpm according to the
relationship:
1 mR/h = 50 kdpm
What method do you use and do you have (or know of) a reference for your
method?
Thanks in advance,
Jeffrey J. Cady, CHP, RPT
Mgr RP Technical Support
Exelon Nuclear
Dresden Station
Phone: (815) 416-2719
[email protected]
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