[ RadSafe ] Radioactivity and Fracking
Cowie, Michael I
michael.cowie at aramco.com
Mon Jan 23 00:13:16 CST 2012
Depends what the material is Dan. If it is scale or sludge from oil production it is not normal to find associated uranium - this usually stays in the reservoir formation. Your observations would be correct if it was drill cuttings.
From: radsafe-bounces at health.phys.iit.edu [mailto:radsafe-bounces at health.phys.iit.edu] On Behalf Of Dan McCarn
Sent: Monday, January 23, 2012 9:06 AM
To: The International Radiation Protection (Health Physics) Mailing List
Subject: Re: [ RadSafe ] Radioactivity and Fracking
Since the material is most likely natural, I make the assumption that the radium is in secular equilibrium with uranium. In order to place these quantities in perspective, the equivalent amount of natural uranium was calculated in mg / kg (ppm). For the regulatory limit of 5 pCi/g Ra ==
0.185 Bq/g this would be the equivalent of 7.32 mg/kg U-Nat. This is slightly less than the typical granites in Wyoming which average about 10 mg/kg U-Nat.
For the sand that would correspond to 45 pCi/g == 1.665 Bq/g, it is equivalent to 66 mg/kg (ppm) U-Nat. (6.59 x 10^-5 g). This could be from a moderately enriched granite or perhaps a heavy-mineral enriched natural sand containing zircon. Pure zircon sands contain from 150 - 300 mg/kg U-Nat == 100 - 200 pCi/kg almost always in secular equilibrium with
The anatectic granites mined for uranium in the Namib Desert in SE Africa
(Namibia) are about 100-125 mg/kg (ppm) U-Nat.
The Chattanooga (USA), Pierre (USA) & Kolm (Sweden) shales are about 100 mg/kg (ppm) U-Nat.
These are only observations.
Dan W McCarn, Geologist
108 Sherwood Blvd
Los Alamos, NM 87544-3425
+1-505-672-2014 (Home – New Mexico)
+1-505-670-8123 (Mobile - New Mexico)
HotGreenChile at gmail.com (Private email) HotGreenChile at gmail dot com
On Sat, Jan 21, 2012 at 8:24 PM, Lawrence Jacobi < rjacobi at jacobiconsulting.net> wrote:
> There has been an interesting series of articles in the Williston
> North Dakota newspaper regarding radioactivity from oilfield
> operations. My impression is that the reporters have tried to write
> balanced articles, but the stories have been replete with mild
> hysteria and misinterpretation of the data.
> Here's the latest:
> Lawrence R. Jacobi, Jr., P.E., J.D.
> Jacobi Consulting
> 10807 Bonaparte Bend
> Austin, TX 78750-2801
> (512) 656-4765 cell
> (512) 335-4006 fax
> You are currently subscribed to the RadSafe mailing list
> Before posting a message to RadSafe be sure to have read and
> understood the RadSafe rules. These can be found at:
> For information on how to subscribe or unsubscribe and other settings
> visit: http://health.phys.iit.edu
You are currently subscribed to the RadSafe mailing list
Before posting a message to RadSafe be sure to have read and understood the RadSafe rules. These can be found at: http://health.phys.iit.edu/radsaferules.html
For information on how to subscribe or unsubscribe and other settings visit: http://health.phys.iit.edu
The contents of this email, including all related responses, files and attachments transmitted with it (collectively referred to as “this Email”), are intended solely for the use of the individual/entity to whom/which they are addressed, and may contain confidential and/or legally privileged information. This Email may not be disclosed or forwarded to anyone else without authorization from the originator of this Email. If you have received this Email in error, please notify the sender immediately and delete all copies from your system. Please note that the views or opinions presented in this Email are those of the author and may not necessarily represent those of Saudi Aramco. The recipient should check this Email and any attachments for the presence of any viruses. Saudi Aramco accepts no liability for any damage caused by any virus/error transmitted by this Email.
More information about the RadSafe