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Re: Natural Uranium and Thorium at DOT Exempt Levels
49CFR173.435 lists a specific activity for both Unat and Thnat. You can
take this specific activity and use it to determine how many grams of
material you would need to have the activity distributed through to meet 2
nCi/gm.
If the material is not radioactive itself and the contamination is strictly
surface, NUREG 1608 provides good guidance for meeting the radioactive
material definition in sections 3.1.2 and 3.2.1.
----- Original Message -----
From: Lori Glander <lglander@scientech.com>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Sent: Friday, May 28, 1999 5:49 AM
Subject: Natural Uranium and Thorium at DOT Exempt Levels
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> Hello All,
>
> When considering Natural Uranium and Thorium against the .002 uCi/g =
> definition for Radioactive Material specified in 49CFR173.403 should the =
> daughters in equilibrium be added to calculate specific activity? =
> 173.434 is a chart of activity-mass relationships for U and Th which =
> doesn't include the daughters.
>
> Thanks,
>
> Lori Glander RRPT
> lglander@scientech.com
>
> =20
>
>
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> <DIV><FONT color=3D#000000 size=3D2>Hello All,</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
> <DIV><FONT color=3D#000000 size=3D2>When considering Natural Uranium and =
> Thorium=20
> against the .002 uCi/g definition for Radioactive Material specified in=20
> 49CFR173.403 should the daughters in equilibrium be added to calculate =
> specific=20
> activity? 173.434 is a chart of activity-mass relationships for U =
> and Th=20
> which doesn't include the daughters.</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
> <DIV><FONT color=3D#000000 size=3D2>Thanks,</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2></FONT> </DIV>
> <DIV><FONT color=3D#000000 size=3D2>Lori Glander RRPT</FONT></DIV>
> <DIV><FONT color=3D#000000 size=3D2></FONT><FONT size=3D2><A=20
> href=3D"mailto:lglander@scientech.com";>lglander@scientech.com</A></FONT><=
> /DIV>
> <DIV><FONT size=3D2></FONT> </DIV>
> <DIV><FONT color=3D#000000 size=3D2> </FONT></DIV>
> <DIV> </DIV></BODY></HTML>
>
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