[ RadSafe ] chemical form of industrial irradiation sources

[franz.schoenhofer at chello.at]

Thank you Doug for providing the ISO and the US regulations. I do not know the details of the regulations in the European Union, but it seems very unlikely to me that metallic Co-60 (and Ir-192) would not need an encapsulation. The Austrian Standard I mentioned is without doubt consistent with the ISO standard, especially in classification of the sources, but my involvement in this standard has been many years ago, so I do not remember all details. 

Best regards,

Franz 


---- Doug Aitken <jdaitken at sugar-land.oilfield.slb.com> schrieb:
> The requirement for most of these sources is that they are designed as "special form" material. Either the material itself will not cause contamination (e.g. Metallic Co60) or, and where the material itself is soluble, they must be encapsulated.
> 
> The International standard for sealed sources is ISO2919 (and in the US ANSI N542, which is incorporated into the US regulations e.g. 10CFR39 subpart C). In this standard, performance requirements (to be proved by testing of prototypes) are specified for temperature, Pressure, Impact, vibration and puncture resistance. There are different requirements depending on the use of the sealed source, whether for Industrial radiography, medical use, surface gauges, irradiators or well-logging (downhole) use.
> 
> And to ensure the integrity of such sources, periodic leak tests are required, also (e.g. ISO/TR 4826, etc.).
> 
> Regards
> Doug
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> -----Original Message-----
> From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On Behalf Of franz.schoenhofer at chello.at
> Sent: Monday, June 30, 2008 12:17 PM
> To: radsafe at radlab.nl; Peter Bossew
> Cc: Marc De Cort
> Subject: Re: [ RadSafe ] chemical form of industrial irradiation sources
> 
> Hi Peter,
> ............. However the irradiation sources are 
> a l w a y s  encapsulated to make them "umschlossene radioaktive Stoffe" ("encapsulated radioactive material"). There exist international and also Austrian Standards for periodic testing of tightness of the cladding. 
>