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Re: IAEA Safety Series #1 / Nbs #92 / NCRP #30
The first issue on Radiotoxicity of radioisotopes published by IAEA was in
the first
IAEA document: Safe Handling of Radiosotopes, IAEA Safety Series 1, 1958,
page 96. The classification of radiotoxicities was as follows: Very high,
High, Moderate and Low, and the I-125 was not listed
Jose Julio Rozental
joseroze@netvision.net.il
Israel
----- Original Message -----
From: David W Lee <lee_david_w@lanl.gov>
To: Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
Sent: Monday, March 20, 2000 8:02 PM
Subject: Re: IAEA Safety Series #1 / Nbs #92 / NCRP #30
> --=====================_8209859==_.ALT
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>
> Ken:
>
> The original radionuclide toxicity table was first published by
> the IAEA in its Technical reports Series No. 15, "A Basic Toxicity
> Classification of Radionuclides" (1963). What the IAEA did was peruse the
> (MPC)-air (168-hr week) values for the various nuclides that had been
> listed in ICRP #2 and then arrange the nuclides into the "High", "Medium"
> and "Low" toxicity groups. Presumably, the nuclides in the "High"
toxicity
> group have much lower (MPC)-air (168 hr week) values than those in the
> "Medium" and "Low" toxicity groups. Unfortunately, in 1960, when ICRP#2
> was first published, no (MPC)-air (168 hr week) value was ever listed for
> I-125; I-125 was not addressed by ICRP #2. The original IAEA table is
> entitled "Table 1 -- Radionuclides Arranged in Order of Their Most
> Restrictive (MPC)-air Value." And my page 12 of my NCRP #30 does not list
> I-125 either. I suspect that folks have been modifying the original IAEA
> Technical Series Report No. 15 table to fit their own purposes over the
> years such that the "latest" such table is but a mere shadow of its
> original self. Happy hunting. Please let RADSAFE know the identity of
> whatever "latest" toxicity table you find.
>
> Best regards David
>
>
> At 10:46 AM 03/20/2000 -0600, you wrote:
> >Hi All -
> >
> >I have a question on a table that is quoted numerous times in various
> >intuitions safety manuals. The table I believe was originally called
> >"Radiotoxicity Hazard from Absorption into the Body". This table
classified
> >certain common radioisotopes in to 4 Group (I Very High - IV Low) based
on
> >their radiotoxicity.
> >
> >What I find interesting is that some nuclides first published in the NCRP
> >#30 as High Toxicity (eg. I-125) 1964 then get republished in IAEA Safety
> >Series number 1 1973 as Low toxicity. The latest attempt to sort
> >radionuclides into hazard groups I found in the Radionuclide and
Radiation
> >Protection Data Handbook 1998. This publication took the exempt level
stated
> >in IAEA safety series 115 and assigned a group level to it. It now
assigns a
> >hazard group 2 (high) to I-125.
> >
> >Does any one know where the latest revision of this table could be found?
If
> >you have any insight as to where and how these tables were derived I'd
like
> >to know?
> >
> >Ken
> >Ken Smith, Radiation Safety Officer
> >
> >Environmental Health and Safety (EH&S) voice: (831) 459-3911
> >University of California fax: (831) 459-3209
> >1156 High St. e-mail: ksmith@cats.ucsc.edu
> >Santa Cruz, CA 95064 web: www.ehs.ucsc.edu
> >
> >************************************************************************
> >The RADSAFE Frequently Asked Questions list, archives and subscription
> >information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html
>
>
> DAVID W. LEE, CHP
> Los Alamos National Laboratory
> Radiation Protection Services
> Radiological Engineering Team Leader
> ESH-12, MS K483
> Los Alamos, NM 87545
> PH: (505) 667-8085
> FAX: (505) 667-9726
> lee_david_w@lanl.gov
>
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> Content-Type: text/html; charset="iso-8859-1"
> Content-Transfer-Encoding: quoted-printable
>
> <html>
> <font size=3D3>Ken:<br>
> <br>
> <x-tab> </x-tab>The
> original radionuclide toxicity table was first published by the IAEA in
> its Technical reports Series No. 15, "A Basic Toxicity
> Classification of Radionuclides" (1963). What the IAEA did was
> peruse the (MPC)-air (168-hr week) values for the various nuclides that
> had been listed in ICRP #2 and then arrange the nuclides into the
> "High", "Medium" and "Low" toxicity
> groups. Presumably, the nuclides in the "High" toxicity
> group have much lower (MPC)-air (168 hr week) values than those in the
> "Medium" and "Low" toxicity groups.
> Unfortunately, in 1960, when ICRP#2 was first published, no (MPC)-air
> (168 hr week) value was ever listed for I-125; I-125 was not addressed by
> ICRP #2. The original IAEA table is entitled "Table 1 --
> Radionuclides Arranged in Order of Their Most Restrictive (MPC)-air
> Value." And my page 12 of my NCRP #30 does not list I-125
> either. I suspect that folks have been modifying the original IAEA
> Technical Series Report No. 15 table to fit their own purposes over the
> years such that the "latest" such table is but a mere shadow of
> its original self. Happy hunting. Please let RADSAFE know the
> identity of whatever "latest" toxicity table you find.<br>
> <br>
> Best regards David<br>
> <br>
> <br>
> At 10:46 AM 03/20/2000 -0600, you wrote:<br>
> <blockquote type=3Dcite cite>Hi All -<br>
> <br>
> I have a question on a table that is quoted numerous times in
> various<br>
> intuitions safety manuals. The table I believe was originally=20
> called<br>
> "Radiotoxicity Hazard from Absorption into the Body".
> This table classified<br>
> certain common radioisotopes in to 4 Group (I Very High - IV Low)
> based on<br>
> their radiotoxicity.<br>
> <br>
> What I find interesting is that some nuclides first published in the
> NCRP<br>
> #30 as High Toxicity (eg. I-125) 1964 then get republished in IAEA
> Safety<br>
> Series number 1 1973 as Low toxicity. The latest attempt to sort<br>
> radionuclides into hazard groups I found in the Radionuclide and
> Radiation<br>
> Protection Data Handbook 1998. This publication took the exempt level
> stated<br>
> in IAEA safety series 115 and assigned a group level to it. It now
> assigns a<br>
> hazard group 2 (high) to I-125.<br>
> <br>
> Does any one know where the latest revision of this table could be found?
> If<br>
> you have any insight as to where and how these tables were derived I'd
> like<br>
> to know?<br>
> <br>
> Ken<br>
> Ken Smith, Radiation Safety Officer<br>
> <br>
> Environmental Health and Safety
> (EH&S)<x-tab> </x-tab>voice: (831) 459-3911<br>
> University of
>
California<x-tab> </x-tab><x-
=
>
tab> </x-tab><x-tab> &nb
=
> sp; </x-tab>fax:
> (831) 459-3209<br>
> 1156 High
>
St.<x-tab> </x-tab><x-tab> &nb
=
>
sp; </x-tab><x-tab> &nbs
=
>
p;</x-tab><x-tab> </x-tab>e-m
=
> ail:
> ksmith@cats.ucsc.edu<br>
> Santa Cruz, CA
>
95064<x-tab> </x-tab><x-tab> &
=
>
nbsp; </x-tab><x-tab> &n
=
> bsp;</x-tab>web:
> <a href=3D"http://www.ehs.ucsc.edu/"=
> eudora=3D"autourl">www.ehs.ucsc.edu</a><br>
> <br>
>
************************************************************************<br>
> The RADSAFE Frequently Asked Questions list, archives and
> subscription<br>
> information can be accessed at
> <a href=3D"http://www.ehs.uiuc.edu/~rad/radsafe.html"=
>
eudora=3D"autourl">http://www.ehs.uiuc.edu/~rad/radsafe.html</a></font></bl=
> ockquote><br>
>
> <br>
> <font size=3D3>DAVID W. LEE, CHP<br>
> Los Alamos National Laboratory<br>
> Radiation Protection Services<br>
> Radiological Engineering Team Leader<br>
> ESH-12, MS K483<br>
> Los Alamos, NM 87545<br>
> PH: (505) 667-8085<br>
> FAX: (505) 667-9726<br>
> lee_david_w@lanl.gov<br>
> </font></html>
>
> --=====================_8209859==_.ALT--
>
> ************************************************************************
> The RADSAFE Frequently Asked Questions list, archives and subscription
> information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html
>
************************************************************************
The RADSAFE Frequently Asked Questions list, archives and subscription
information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html