Re: Se-75 for industrial radiography

[David W Lee <lee_david_w@lanl.gov>]

Leif:

        Here at Los Alamos National Laboratory, certain operating groups have done R&D work to develop what are locally referred to as "shuffler" systems.  On some of these system, Se-75 has been selected as the radiation source of choice.  On one of the Se-75 shufflers, a drum of waste is placed on a special holder and a computer program controls the rotation and elevation of the drum while the radiation beam from the Se-75 source irradiates the drum.  The radiation penetrating the drum is then detected and an image of the drum contents displayed on the computer.  Many of the shuffler designs developed by LANL have later been transferred to various interested commercial companies that market radioactive waste assay equipment.  REGARDS  David


At 02:00 AM 9/3/1998 -0500, you wrote:
>I would be interested in hearing any comments or concerns from the more
>knowledgeable list members than myself about the use of Se-75 for industrial
>radiography. 
>
>My understanding is that Se-75 has been used for this purpose in the middle
>east, U.K and possibly elsewhere in Europe. Has it been used in the U.S ?
>
>Many of the important parameters from someone wishing to use it look quite
>good (half life 118 days, gamma constant 0.48 R/h/Ci @ 1m, energies - 66 keV
>410 keV, useful thickness range 4mm - 28mm).
>
>Does any one know of any particular safety concerns applying to this isotope
>that warrant special consideration.
>
>Your comments are welcome.
>
>Regards
>
>Leif Dahlskog
>Scientific Officer
>Radiation Health Section
>Health Department of Western Australia
>leif.dahlskog@health.wa.gov.au
>
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DAVID W. LEE
Los Alamos National Laboratory
Radiation Protection Services, ESH-12
PO Box 1663, MS K483
Los Alamos, NM  87545
PH:   (505) 667-8085
FAX:  (505) 667-9726
lee_david_w@lanl.gov