[ RadSafe ] [Radsafe] A guideline on radioactivity in concrete?

[John R Johnson]

Mike

Thanks for this.

It makes me wonder what they do with Rn-222 (halflife 3.8 days) and Rn-220 
(halflife 55 seconds). Are they always the same if the starting material had 
equal activities of natural uranium and  thorium?

John
***************
John R Johnson, PhD
CEO, IDIAS, Inc.
4535 West 9th Ave
604-676-3556
Vancouver, B. C.
V6R 2E2, Canada
idias at interchange.ubc.ca

----- Original Message ----- 
From: "Brennan, Mike (DOH)" <Mike.Brennan at DOH.WA.GOV>
To: <radsafe at radlab.nl>
Sent: Thursday, June 04, 2009 9:15 AM
Subject: RE: [ RadSafe ] [Radsafe] A guideline on radioactivity in concrete?


> Good luck:  Some years ago I proposed that tritiated water be disposed
> of by using it in concrete for freeway barrier and bridge abutments.  It
> was dismissed out of hand, with the reason given children might knock
> chips off of the concrete and eat them (I think that the actual reason
> it was rejected was that the people in charge didn't want there to be
> any possibility that something radioactive be viewed as a resource
> rather than a waste.  This was the same group that, when they found out
> that the Co60 at a particular site was going to have decayed to below
> detectable before the site was scheduled to be cleaned up declared, "For
> the purposes of calculating clean-up levels, radiological decay does not
> occur.")
>
> -----Original Message-----
> From: radsafe-bounces at radlab.nl [mailto:radsafe-bounces at radlab.nl] On
> Behalf Of Nick Tsurikov
> Sent: Thursday, June 04, 2009 5:05 AM
> To: radsafe at radlab.nl
> Subject: [ RadSafe ] [Radsafe] A guideline on radioactivity in concrete?
>
> Dear all,
>
> I am trying to compile the list of different approaches used in
> regulating the amount of radioactivity one may have in concrete, road
> building material etc.  Basically, the idea is to blend the sand waste
> with cement etc to a certain level and make up some blocks that will be
> used to prevent beach erosion.  After the manufacture no exposures are
> expected except for the fish and for some random diver...
> If you could point me in the right direction it will be very much
> appreciated.  Most available documents are either:
> a) addressing building materials for human habitation, or
> b) having radon exhalation taken into account, or
> c) both.
> Thanks in advance
>
> Kind regards
> Nick Tsurikov
> _______________________________________________
> 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://radlab.nl/radsafe/radsaferules.html
>
> For information on how to subscribe or unsubscribe and other settings
> visit: http://radlab.nl/radsafe/
> _______________________________________________
> 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://radlab.nl/radsafe/radsaferules.html
>
> For information on how to subscribe or unsubscribe and other settings 
> visit: http://radlab.nl/radsafe/