Re: Uranium Uptake Above 10 CFR 20 Limit

[William V Lipton <liptonw@dteenergy.com>]

  10 CFR 20.1201(e):  "In addition to the annual dose limits, the licensee shall
limit the soluble uranium intake by an individual to 10 milligrams in a week in
consideration of chemical toxicity (see footnote 3 of appendix B to part 20)."

The opinions expressed are strictly mine.
It's not about dose, it's about trust.

Bill Lipton
liptonw@dteenergy.com


William Lorenzen wrote:

>           Why is a 10mg/week of "soluble" uranium limit even discussed?  Is
>           it more restrictive that the committed effective dose from the
>           class Y U3O8?  If one were to look at bioassay models for class Y
>           I'm not sure urinalysis is the preferred method.
>
>           I though that ~10mg of insoluble U3O8 in the lungs would equate to
>           about, if not greater than, 5 rem TEDE.  Does anyone have INDOS and
>           can run a quick DIL table for U3O8 to see what fraction might be in
>           the urine?
>
>           William A. Lorenzen
>           Children's Hospital
>           Boston, MA 02115
>
>           lorenzen_w@a1.tch.harvard.edu
>
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