RE: More on VDTs

["Harmon, Terry O'Devah (ONF) " <onf@bechteljacobs.org>]

 I have surveyed a lot of CRTs out of K-1059.  There is usually little alpha
direct, but Beta directs usually range from 1200 dpm to 3500 dpm..  When I
asked about this, I was told that NORM was used in the manufacture of the
phosphor.
Terry Harmon
Sr. Health Physics Tech
Kelly Scientific Resources
Phone: (865) 241-0289
Pager: (865) 417-1592
Email: onf@ <mailto:harmonto@ornl.gov> bechteljacobs.org


	-----Original Message-----
	From:	Algutifan, Elizabeth K. (ELB)  [SMTP:elb@bechteljacobs.org]
	Sent:	Monday, July 31, 2000 12:02 PM
	To:	Multiple recipients of list
	Subject:	RE: More on VDTs

	Bill, somehow I doubt the answer is this simple. One point of my
post is the
	fact that a lot of these references date from the 1980s, and
computer
	technology has advanced greatly during that time. Note that smears
on the
	glass and plastic case generally indicate no detectable
contamination.

		Elizabeth Algutifan, CHP
		Bechtel Jacobs Company LLC
		East Tennessee Technology Park
		Oak Ridge, TN
		algutifane@bechteljacobs.org


	> -----Original Message-----
	> From:	bill_goldsmith@urscorp.com [SMTP:bill_goldsmith@urscorp.com]
	> Sent:	Monday, July 31, 2000 10:48 AM
	> To:	Multiple recipients of list
	> Subject:	Re: More on VDTs
	> 
	> 
	> Shouldn't I get four choices?  Anyway, the answer is b)
electrostatic
	> attraction of radon daughters.  The late Phil Perdue published a
letter
	> about this in Health Physics in the early 1980's.  You can verify
this
	> through a number of experiments including looking at the alpha
response
	> using a ZnS probe, covering the VDTs in plastic and recounting
them after
	> a
	> few hours' decay time, etc.
	> Bill Goldsmith
	> Radian Remediation Services
	> 865.220.8265
	> bill_goldsmith@urscorp.com
	> 
	> 
	
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