Re: Dose to others from medical uses of radioactivity, and a PS o

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

It should be noted that 10CFR20.1002 has been revised to read:  "...The
limits in this part do not apply ... to exposure from individuals
administered radioactive material and released in accordance with
10CFR35.75..."  10CFR35.75(a) allows the release [with several conditions]
of nuclear medicine patients if..."the total effective dose equivalent to
any other individual from exposure to the released individual is not likely
to exceed 5 millisieverts (0.5 rem)."

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


Jim Kost wrote:

> What about prostate cancer patients, some type of radioisotope seed is
> used for these patients.
>
> Jim Kost
> jkost@mgpi.com
>
> -----Original Message-----
> From: Jacques.Read@eh.doe.gov [mailto:Jacques.Read@eh.doe.gov]
> Sent: Thursday, February 10, 2000 11:52 AM
> To: Multiple recipients of list
> Subject: Dose to others from medical uses of radioactivity, and a PS on
>
> A colleague  has been carrying a pocket alarm/dosimeter around for
> years,
> visiting various DOE facilities.  It has never alarmed.  While
> traveling, he
> keeps it in his briefcase.  While awaiting a flight at a regional
> airport
> recently, the alarm went off in his briefcase whenever a elderly
> gentleman
> walked by.  I compared his experience with the RADSAFE discussion a week
> or so
> ago about misadministration of 131I, in which 500 microcuries had been
> injected
> instead of 100 microcuries.  By my rough estimate, 500 microcuries would
> given a
> dose rate of only 0.03 mr/hr at six feet.  Presumably the gentleman was
> not a
> thyroid patient.  Did I botch up my dose rate estimate, and are there
> other
> medical procedures that could give tens of mr/hr at six feet?
>
> P.S.  To answer Al's question: The depleted uranium from the Paducah
> gaseous
> diffusion plant is believed to have been contaminated by the use of
> improperly
> decontaminated steel storage cyclinders to receive the UF6 from the
> product end
> of the cascade.  The DU has typical Pu content of the order of  0.01 to
> 0.001
> Becquerels per gram of uranium.  The cyclinders had previously contained
> recycled uranium of a few parts per billion Pu content.
>
> Jacques Read
> jacques.read@eh.doe.gov
>
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