[ RadSafe ] Subject:TLDs and their Controls

[Sandy Perle]

On 25 Aug 2005 at 13:39, Paul, Tim wrote:

> In my experience one frequent cause of many badges with low
> ~background readings is simply that the personnel and control badges
> are not necessarily processed in the same batch by the vendor.  As a
> result, proper control subtraction is not performed on thse batches.

If this is the case, then there is a REAL problem!  This is an issue 
that should focus on inventory control, receipt and inspection, 
process control and the ability to recognize that appropriate 
controls are in place, and more importantly, when there are no 
controls, how is the data evaluated using statistical accuracy, and 
not simply throwing in a fixed subtraction into the calculation. The 
fixed value should really be a variable value, that incorporates the 
time-frame and other important influence quantities. Tim's suggestion 
is a symptom, but the real question is, what are the root causes for 
this to even happen!
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Sandy Perle 
Senior Vice President, Technical Operations 
Global Dosimetry Solutions, Inc. 
2652 McGaw Avenue
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