Dose coefficients for unknown radionuclides

[Jean-Michel Mure <jm.mure@andra.fr>]

Dear Radsafers,

Setting up some new criteria for low level waste requires to determine the potential impact of these radionuclides : Ar39, Ar42, Kr81, Kr85, Nb91, Nb92, Gd150, Dy154, Ho163, Bi208, Po208, Po209, Es252. I cannot fin the dose coefficients (external and internal exposure) of these radionuclides in the federal guidances n°11 and n°12.

Questions :

1. Why are these radionuclides not dealt with in the guidance ?
2. Are you aware of a refernece where I could find these ?
3. Do you know if there is a way of calculating a dose coefficients for such radionuclides ? 
4. Who shall I contact ? 

Regards,

Thanks for any information
Jean-Michel Mure
Direction de la Sûreté
Service Sécurité et Radioprotection
Tel : 8374 - Fax : 8013 - email : jm.mure ************************************************************************ The RADSAFE Frequently Asked Questions list, archives and subscription information can be accessed at http://www.ehs.uiuc.edu/~rad/radsafe.html