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Joe et al. -
If memory serves, Dr. S.Y. Chen at Argonne is trying to reconstitute an
ANSI committee to look at "late-phase" radiation limits ... this would seem to
be right up that committee's alley. The previously-cited values are
"intermediate phase" guidance levels from EPA-R-92-001.
Jim Hardeman
Jim_Hardeman@dnr.state.ga.us
>>> John Andrews <andrewsjp@chartertn.net> 2/28/2003 13:26:22 >>> Nardi, A. Joseph wrote: >This is really an issue of "How clean is clean enough". When >decommissioning a licensed facility we are required to take more effort to >chase "the last atom" because of the exposure scenarios that are associated >with the development of cleanup criteria. Such decommissioning scenarios >should not be considered applicable to the cleanup associated with an act of >terrorism particularly in an outdoor environment. It seems to me that one >of the considerations that should be thought out now is what would be the >appropriate cleanup criteria to be applied in the event of such an act of >terrorism. Otherwise we are going to end up with the default criteria. The >elements that would be required to establish appropriate criteria might be >as follows: > >* Establish a rational dose criteria to be used in these scenarios. >This might be done on a time dependent basis such as the first five years, >the second 10 years, etc. >* Define a realistic scenario for the dose calculation based on >different dirty bomb scenarios. >* Establish a model that is based on realistic model parameters, not >using the general approach for decommissioning models where the parameters >are the 90th percentile or other levels of conservatism. >* Use the above to establish reasonably protective cleanup criteria >that can be used in such an event before the act rather than trying to >develop the criteria in the "heat of the moment". > >Just my humble opinion > > >A. Joseph Nardi, Supervisory Engineer >Westinghouse Electric Company >P. O. Box 355 >Pittsburgh, PA 15230 >Telephone: 412-374-4652 >FAX Number: 412-374-3357 >email: nardiaj@westinghouse.com > > > Joe, this is an excellent idea. Let me suggest that the criteria include that there will be no immediate harm to a person and that the long term risks are low. John Andrews Knoxville, Tennessee ************************************************************************ You are currently subscribed to the Radsafe mailing list. To unsubscribe, send an e-mail to Majordomo@list.vanderbilt.edu Put the text "unsubscribe radsafe" (no quote marks) in the body of the e-mail, with no subject line. You can view the Radsafe archives at http://www.vanderbilt.edu/radsafe/ |