[ RadSafe ] Determining Radon

[Blankenship, James D]

Douglas,

A number of vendors market field (or at least relatively portable)
instruments that may be of use in a high radon environment. My
experience is with the CM-11 from Thermo, which runs a radon recognition
algorithm (and yes, Franz, we all understand that the instrument
actually detects progeny), but a good web search will yield many
options.

Depending on your budget and your philosophy on personnel release
methods, you may find an option that will provide some relief for that
long line of people standing in front of the fan!

Daren Blankenship

-----Original Message-----
From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
Behalf Of Director
Sent: Monday, April 25, 2005 7:36 AM
To: radsafe at radlab.nl
Subject: [ RadSafe ] Determining Radon

 Greetings Douglas,



Your Radon woes are not unique. I work at a D.O.E site here in South
Carolina and deal with this every day. We use the PCM whole body
friskers also. The only thing you can do when confronted with the
problem is consider the half life of radon and her daughters and hold
the suspect contaminee for a period of time waiting for decay. Typically
we survey the individual as if more serious contamination were present
and isoloate them accordingly, then wait in increments of 30 minutes,
remonitoring after each time set.
Significant decay indicates radon. We do not allow the person to pass
until they are able to clear the monitor twice. 



It appears Franz seems more interested in proclaiming the virtue of his
education rather than helping you with the problem. While "radiation
professionals" like Franz may have their place in the industry, public
relations would obviously NOT be one of them. 



Good luck Doug,



Paul Gray director at eventhorizonmedia.net



>

> Our soil remediation project just acquired a PCM-2.  This is a whole

body

> gas proportional frisker set up to detect alpha and beta

contamination.

> Since we are a soil remediation project, we are subject to radon gas.

Per

> our procedures, we are required to report all personal skin and

clothing

> contaminations with the exception of contamination due to radon gas.

I

> was wondering if anyone out there has had experience with this type of

> instrument in detecting radon gas and what methodology is used in the

> field to determine if the alarms are due to radon or real

contamination?

> Please keep in mind that we do not have a count room available with

the

> gamma spec. capabilities.  We are limited to field instruments only.

>

> Thank you in advance for all replies to this inquiry.

>

> Douglas Coble
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