Re: 30 mCi of I-131

["J. J. Rozental" <joseroze@netvision.net.il>]

This value is for American Standards, nevertheless other countries also are
using the same value, as my own country, Brazil,  where Michael Stabin is
working at the moment.
However, there are many countries where this value is more restrictive, as
Australia, 15 mCi, and other up 10 mCi. Colleagues from Australia, German
and Sweedan, can inform about.
The value of 1100 Bq (30 mCi)  you can find in the IAEA Basic Safety
Standards, Safety Series 115, 1996, page 284 - Table III-VI Guidance Level
for Maximum Activity for Patients in Therapy on discharge from Hospital.
Now, considering your note: "the new set of regulations allowing release of
patients with much
greater than 30 mCi",  I would like also to draw your and Michael attention
to the IAEA footnote: "In some countries a level of 400 MBq (10 mCi) is used
as an example of good practice". This is a conflict of concept on what a
good practice is, in this context. The advantage x disadvantage (risk x
benefit) on this issue is very interesting, considering social and economic
factors.

Jose Julio Rozental
joseroze@netvision.net.il
Israel



----- Original Message -----
From: Tonry, Louie L MAJ EAMC <Louie.Tonry@se.amedd.army.mil>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Sent: Monday, June 12, 2000 1:41 PM
Subject: RE: 30 mCi of I-131


> The reference is in the NCRP 37.  This philosophy is also carried forward
> into the new set of regulations allowing release of patients with much
> greater than 30 mCi.
>
> Lou
>
> Louie L. Tonry
> LOUIE TONRY, CHP
> MAJOR, MS
> Chief, Radiation Protection Division
>
> Eisenhower Army Medical Center
> ATTN: MCHF-LOG-HP (Radiation Protection), Box 264
> Ft. Gordon, Georgia 30905-5650
>
> Voice:  Facsimile:
> DSN: 773-4692/6392 DSN: 773-3427
> Commercial: (706) 787-4692/6392 Commercial: (706) 787-3427
>
> Internet: Louie.Tonry@SE.AMEDD.ARMY.MIL
>
>
> -----Original Message-----
> From: Michael Stabin [mailto:stabin@npd.ufpe.br]
> Sent: Saturday, June 10, 2000 3:48 PM
> To: Multiple recipients of list
> Subject: 30 mCi of I-131
>
>
>
> Does anyone have a **documented** reference on which the release criterion
> of 30 mCi for I-131 therapy patients, employed for so many years, was
based?
> We are trying to cite this in a paper, and need an objective reference if
> possible.  I remember hearing once that it was based on some real
> calculations, regarding contact of the radioactive patient with the public
> and family members, occupancy factors, etc., but I can't find the
specifics
> of this calculation, if it exists, or the source.  (I am aware of the
newer
> Nureg and RegGuide on this subject, but we want to reference this earlier
> standard in our discussion.)  Thanks in advance for any help.
>
>
>
> Michael Stabin, PhD, CHP
> Departamento de Energia Nuclear/UFPE
> Av. Prof. Luiz Freire, 1000 - Cidade Universitaria
> CEP 50740 - 540
> Recife - PE
> Brazil
> Phone 55-81-271-8251 or 8252 or 8253
> Fax  55-81-271-8250
> E-mail stabin@npd.ufpe.br
>
> "Quantum Mechanics: The dreams stuff is made of"
> - Steven Wright
>
>
>
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