[ RadSafe ] DHS Tests of Radiation Detectors WereInconclusive, Report Says

[Doug Aitken]

Jeff:
Of course calibration is required.

But there is a difference between calibrating against standard reference
sources and being told what will be used in the "test" and optimizing
performance to detect it.....

The implication is that the latter "technique" was used.

However, if you have more detailed information on the methodology used, (as
I guess you are probably working in the detector division of ThermoFisher),
we would be interested to hear it. 

BTW, we have just purchased a bunch of your Packeye Backpacks (for hunting
Ambe and Cs-137 sources in the event that they were ever lost), so I guess I
could be considered an "interested bystander"!

Regards
Doug
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
Doug Aitken     Cell phone: 713-562-8585
QHSE Advisor
D&M Operations Support           
Schlumberger Technology Corporation
300 Schlumberger Drive
Sugar Land TX 77030

Home office: 713-797-0919  Home Fax: 713-797-1757
______________________________________________



-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf
Of Sawyer, Jeff
Sent: Thursday, March 06, 2008 7:41 AM
To: radsafe at radlab.nl
Subject: RE: [ RadSafe ] DHS Tests of Radiation Detectors WereInconclusive,
Report Says

When was the last time you used a radiation monitor that hadn't first
been calibrated?

Jeff 

[edit]

>With that certification in mind, the nuclear detection office conducted
>tests in Nevada early last year. Those tests were called into question
when
>GAO auditors found that department officials had allowed contractors to
>conduct "dress rehearsals" and calibrate their machines in anticipation
of
>the tests.
>The review team's report discounted the auditor's findings that the
tests
>were biased. The team also said it found no evidence the test data were
>manipulated.

March 4

         What is the difference between this and outright collusion?
*Is* 
there any difference?

Steven Dapra


>****************************************
>No comment.
>
>Clayton J. Bradt
>dutchbradt at hughes.net

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