[ RadSafe ] outdoor low dose rate measurements

radbloom at comcast.net radbloom at comcast.net
Wed Apr 3 14:53:15 CDT 2013


We used to report most of our measurements as < 0.05 mR/h , or <0.05 mrad/h  because the meters and detectors  we used fluctuated significantly bel ow this tick mark.  I strongly suggest walking around with your survey meter  to see if you can easily discern the levels you  want your user to see.  What kind of meter/detector will be used? 

Good luck. 


----- Original Message -----

From: "JOHN RICH" <JOHN.RICH at sargentlundy.com> 
To: radsafe at health.phys.iit.edu 
Sent: Wednesday, April 3, 2013 3:39:15 PM 
Subject: [ RadSafe ] outdoor low dose rate measurements 


I just finished a calculation that's going to require a minimally trained 
individual (not a radworker)  to notice the difference between 0.03 
mrad/hr and 0.13 mrad/hr on a handheld meter while walking around an 
outdoor storage area. I'm stressing that this is a calculated result 
because it's the maximum calculated difference. The minimum calculated 
difference is between 0.02 mrad/hr to 0.04 mrad/hr. Actual dose rates 
should fall somewhere in between. 

Is this a reasonable expectation, or is it asking too much of an outdoor 
walk-around with a hand held meter?  BTW, I have no idea what the radon 
conditions are. 

thx in advance  - -jmr 

John Rich 
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