[ RadSafe ] Removal of Cs-137 source from an old irradiator

[bjmannpe at aol.com]

Maryla:

I'm assuming that the gamma flux/fluence at the surface of the container is > 0. Many years ago when I worked at SANDIA, they did a lot of weapons device examination, including non-destructive examination (NDE). I assume that SANDIA still has some NDE experts. He/she could advise you on film specs and exposure parameters (primarily time) and placement. I would think that at a minimum film radiographs would pinpoint the source elevation within the container and identify radial structure/features of the device at that elevation.

Bruce






-----Original Message-----
From: Wasiolek, Maryla <mwasiol at sandia.gov>
To: The International Radiation Protection (Health Physics) Mailing List <radsafe at agni.phys.iit.edu>
Sent: Tue, Aug 16, 2011 12:24 pm
Subject: Re: [ RadSafe ] Removal of Cs-137 source from an old irradiator


Bruce,
An interesting suggestion.  However, the shielding could be a problem for 
maging, i.e., the very construction of the irradiator.
Thanks,
Maryla  
-----Original Message-----
rom: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] 
n Behalf Of bjmannpe at aol.com
ent: Tuesday, August 16, 2011 5:28 AM
o: radsafe at health.phys.iit.edu
ubject: Re: [ RadSafe ] Removal of Cs-137 source from an old irradiator

ave you considered imaging techniques, using film or "gamma cameras" to show 
he internal construction of the device. You already have the strategically 
laced gamma source!
Bruce Mann



----Original Message-----
rom: Wasiolek, Maryla <mwasiol at sandia.gov>
o: The International Radiation Protection (Health Physics) Mailing List 
radsafe at agni.phys.iit.edu>
ent: Mon, Aug 15, 2011 6:58 pm
ubject: Re: [ RadSafe ] Removal of Cs-137 source from an old irradiator

entlemen, 
hank you very much for the tips.  At some point we did contact OSRP, but from 
at I understand, the removal of our source was not quite consistent with their 
ssion. The irradiator is rather large, about 6 feet tall, which is why we 
ought we would try to remove the source for disposal, e.g., from behind the 
ield wall using manipulators.  That is why I was looking for the information 
 how the irradiator was constructed inside. 
hanks again,
aryla Wasiolek
mma Irradiation Facility
ndia National Laboratories
buquerque, NM
5-844-3507    
----Original Message-----
om: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] 
n Behalf Of ROY HERREN
nt: Monday, August 15, 2011 3:43 PM
: The International Radiation Protection (Health Physics) Mailing List
bject: Re: [ RadSafe ] Removal of Cs-137 source from an old irradiator
he very best deal to be had for disposal of these types of items can be found 
 Off-Site Source Recovery Project, OSRP, http://osrp.lanl.gov/.  The cost to 
ur facility will be minimal, that is if there is any cost at all.
Roy Herren 

______________________________
om: "DrDonRhodes at cs.com" <DrDonRhodes at cs.com>
: radsafe at health.phys.iit.edu
nt: Mon, August 15, 2011 2:35:30 PM
bject: Re: [ RadSafe ] Removal of Cs-137 source from an old irradiator
i,
    I had a similar problem 25 years ago involving 200 curies of Co-60 
 an experimental device which I designed and built.  I had a complete set 
 drawings, but I did not try to remove the sources.
    I got a type B shipping container from Chem Nuclear Systems, loaded 
e device, mixed and poured in concrete and shipped for disposal.
    This is expensive and does not help you much.
od luck,
on Rhodes
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