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Natural Uranium and Thorium at DOT Exempt Levels

To: <radsafe@romulus.ehs.uiuc.edu>
Subject: Natural Uranium and Thorium at DOT Exempt Levels
From: "Lori Glander" <lglander@scientech.com>
Date: Fri, 28 May 1999 08:44:58 -0400

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

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