RE: Comparison of Electronic Dosimeters to TLDs

["Sandy Perle" <sandyfl@earthlink.net>]

> Power plants that use our equipment have comparison data between the ED
> and TLD.  Typically the data that I have seen is between 5 to 20 percent
> low for the EDs.

The ideal situation is one where the TLD is < ED by about 5 to 10%. 
This builds in a margin of error where there are NO big surprises 
when the official dose of record is determined by the TLD or other 
dosimeter. My experience has been that the EDs in the field normally 
over-respond as stated above. Rarely do I see a situation where the 
TLD over-responds as much as suggested. If the TLD is over-responding 
by 20%, I consider that to mean there is a flaw in the system, either 
with the TLD program, or, the ED program. It is systematic of 
something much bigger, and needs to be reconciled.



------------------------------------------------------------------------
Sandy Perle					Tel:(714) 545-0100 / (800) 548-5100   				    	
Director, Technical				Extension 2306 				     	
ICN Worldwide Dosimetry Division		Fax:(714) 668-3149 	                   		    
ICN Biomedicals, Inc.				E-Mail: sandyfl@earthlink.net 				                           
ICN Plaza, 3300 Hyland Avenue  		E-Mail: sperle@icnpharm.com          	          
Costa Mesa, CA 92626                                      

Personal Website:  http://www.geocities.com/scperle
ICN Worldwide Dosimetry Website: http://www.dosimetry.com

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