[ RadSafe ] Airborne Monitoring for Cl-39

[Thomas Johnston]

Hello Jim,
I found a couple of links that ?may? be of some help? Found these via a
Google Scholar search for:
 "Airborne Monitoring 39Cl radiation"


A Detailed Calibration of a Stack Monitor Used in the Measurement of
Airborne Radionuclides at a High Energy Proton Accelerator

Kamran Vaziri et al.   http://lss.fnal.gov/archive/1996/pub/Pub-96-037.pdf

Calculation Of Airborne Radioactivity Hazard From Machining Volume-Activated
Materials

E. T. Marshall* and S. 0. Schwahn
http://lss.fnal.gov/archive/1996/conf/Conf-96-339.pdf
Also, the following acticle in *Health Physics* seems to be frequently
mentioned and referenced in these discussions:

Butala, S. W.; Baker, S. I.; Yurista, P. M. Measurement of radioactive
gaseous releases to air from target halls at a high-energy proton
accelerator. Health Phys. 57: 909-916; 1989.

And there is the work by H. Wade Patterson, Accelerator Health Physics, that
may prove useful.
Thomas Johnston

Health Physicist
On Tue, Nov 17, 2009 at 10:50 AM, Tracy, James W. <james.tracy at nist.gov>wrote:

> Hello,
>
> I am looking for information for performing airborne monitoring for Cl-39.
>  We are operating an accelerator and plan to irradiate liquid Argon for an
> experiment.  This will result in the production of Cl-39 via gamma
> activation.  I expect some of the Cl-39 to change from liquid to gas and
> become airborne.  We have local ventilation that will exhaust this out of
> the building via a stack.  I want to monitor the stack effluents during this
> operation.
>
> My question is how do I sample this?  Normally, I would sample the stack
> with a filter paper and charcoal cartridge.  But with the chlorine being a
> gas, I'm not sure what collection efficiency I would have.
>
> Thanks,
>
> Jim Tracy
> Health Physicist
>
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