Regulations/Standards for Gamma rays Shielding 2

[ADAG]

Hello, I am looking for master specifications or international regulations on Gamma ray shielding for Industrial Equipment. The Radioactive isotope is Cobalt 60 and the particular equipment is a radioactive concentration transmitter for a dredge.

Thanks,

A.

 

[vpl]

Have you looked on IAEA's site? (

http://www.iaea.org/worldatom/

) Don't know that there is a "master spec", it may be more that each country has its own regulations. also try searching the code of federal regulation for gamma ray shielding (

http://www.access.gpo.gov/nara/cfr/cfr-table-search.html)

Patricia Lougheed

Please see FAQ731-376 for tips on how to make the best use of the Eng-Tips Forums.

 

[Rich2001]

Here is a starting point

http://www.osha.gov/SLTC/radiationionizing/introtoionizing/ionizinghandout.html

 

[HamishMcTavish]

Hi ADAG,

Radiological protection to minimise doses to operators and the public involves more than shielding. Typically you look at distance, time of exposure AND shielding to optimise the design of your plant.

I would anticipate that most of the legal restrictions you will find will be to limit the dose rather than specify shielding thickness, however you could look in books on nuclear engineering to find attenuation coefficients of various materials.

Try the "Reactor Handbook 2nd Ed. Volume IV, Gamma Ray Attenuation", Blizard EP and Abbott LS, Interscience 1962 or "Introduction to Nuclear Engineering 3rd Ed.", Lamarsh JR and Baratta AJ, Prentice Hall 2001. The former is qute old but once you have located it have a look around the shelves and see what else is in the near vicinity! Since you have a cobalt source the energy of the gamma is well known but you will need to know the activity of the source to use the various graphs/tables.

Regards, HM.

No more things should be presumed to exist than are absolutely necessary - William of Occam