AW: [ RadSafe ] Pipe coating using Cs-137

Franz Schönhofer franz.schoenhofer at
Mon Apr 3 17:59:29 CDT 2006

Dear collegue,

Your request reminds me to a very long ago lecture (about four decades) of a
professor of mine, who reported the use of a machine, equipped with a Cs-137
source, which was used to clean pipes and which's progress could be
monitored and if it was stuck could be easily located. 

This is obviously similar to your scenario. 

Not being able to answer to the point, because I do not know the radiation
protection regulations in your country, I would believe, that persons
working with radioactive sources (depending on their involvement) might be
classified as radiation workers. 

Again I refer you to your countrie's regulations and if there are nones,
refer to the IAEA guidance rather than to the US regulations. 

Best regards,


Franz Schoenhofer
PhD, MR iR
Habicherg. 31/7
A-1160 Vienna
phone -43-0699-1168-1319

> -----Ursprüngliche Nachricht-----
> Von: radsafe-bounces at [mailto:radsafe-bounces at] Im
> Auftrag von Abu-Jarad, Falah A
> Gesendet: Montag, 03. April 2006 15:17
> An: radsafe at
> Betreff: [ RadSafe ] Pipe coating using Cs-137
> Dear All
> Radiation workers using radiation sources of Cs-137 during their job of
> internal oil pipe coating. The source used from outside of the pipe as
> indicator to the boundaries where the coating machine inside the pipe
> will stop. Is there any radiation protection guide or instruction to
> this type of job?.  Are the workers considered as industrial
> radiographers?
> Your input is greatly appreciated.
> Regards
> Dr. Falah Abu-Jarad
> abujarad at
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