Re: radiotoxicity of various nuclides

[Ruth Vandegrift <Ruth_Vandegrift@health.ohio.gov>]

     The "Health Physics and Radiological Health Handbook" Table 11.1.1.1 
     provides Toxicity Classification of Radionuclides.  The table is from 
     the International Labor Office "Guidelines for the Radiation 
     Protection of Workers in Industry - Ionizing Radiations" c 1989.  Low 
     beta yield radionuclides such as Be7, Co57, etc. fall in to Group 3, 
     entitled "Moderate Radiotoxicity".  This is compared to Group 1 which 
     is Very High Radiotoxicity i.e., Ra226, Pu239, Am241, Cf252; Group 2 
     which is High Radiotoxicity i.e., Co60, Th Nat, Sr90; Group 4 which is 
     Low Radiotoxicity i.e., H3, Tc99m, U nat.
     
     RVandegrift
     rvandegr@health.ohio.gov


______________________________ Reply Separator _________________________________
Subject: radiotoxicity of various nuclides
Author:  radsafe@romulus.ehs.uiuc.edu at Internet
Date:    1/22/96 4:22 PM


I saw a couple postings a while back concerning (I think) contamination 
limits based on the radiotoxicity levels of the isotope.  If I remember, the 
information came from Australia.  Does someone out there have some 
information on this that they could share?  What are the guidance/source 
documents these come from?  Are they based on direct comparisons of ALI's or 
some other simple ratios that could be applied to any given nuclide.   I'm 
particularly interested in electron capture or low beta yield nuclides - 
Be-7, Cr-51, Co-57 etc.
     
Thanks in advance for any information.
     
Keith Welch
CEBAF
welch@cebaf.gov
KW