[ RadSafe ] Re: tailings cover for gamma attenuation

Mark Sonter sontermj at tpg.com.au
Thu Jul 31 21:19:16 CDT 2008

Hi all,

Does anyone out there in Radsafe Land have good, preferably 
experimental, info on the Half-Value Layer for sand or soil capping over 
thorium-bearing tailings from mineral processing plants (either mineral 
sands dry plants or rare earths extraction plants)?? The thickness 
required *for gamma attenuation* is likely to be greater than for 
uranium tails because of the dominant 2.6 MeV from Thallium versus the 
609 keV from Bismuth 214...

Dan McCarn? Phil Edigi?? Dr Parthasarathy? Anybody else??


Mark Sonter

Radiation Advice & Solutions Pty Ltd,   abn 31 891 761 435
Asteroid Enterprises Pty Ltd,   abn 53 008 115 302

116 Pennine Drive
South Maclean, Queensland 4280

Phone / fax  (07) 3297 7653
Mobile 0412 433 286

“Keep everything as simple as possible, but no simpler”  - A. Einstein 


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