RE: skyshine from radiography sources, Tokaimura criticalityacci dent

["Minnema, Douglas" <Douglas.Minnema@nnsa.doe.gov>]

Mike, 



There is some radio-iodine, but it is part of the remaining 5% of the dose.

Check out DOE's release fractions handbook (sorry, I don't have the

reference with me now).  It has a section on criticality accidents that

lists the isotopes that you should assume get released, and a second list

for the fractional releases depending on the type of criticality accident

(metal, solutions, finely divided powders, etc.).



If you are interested, I can send you an example of the calculations when I

get back to the office next Tuesday.  Please send me a message off-list and

I'll get back to you.



Doug



-----Original Message-----

From: Michael McNaughton [mailto:mcnaught@lanl.gov]

Sent: Thursday, March 13, 2003 10:09 AM

To: Minnema, Douglas; 'Bolling, Jason E'; 'Radsafe (E-mail)'

Subject: RE: skyshine from radiography sources, Tokaimura criticality

acci dent





At 12:10 AM 03/13/2003 -0500, Minnema, Douglas wrote:

>Also, the release of shortlived noble gases needs to be considered, 

>especially for solution systems.  In models I developed a while back, in a 

>room with 8 room changes per hour the shortlived nobles contributed over 

>95% of the plume dose at 100 meters.



Doug: is it only nobles? For example, is there a contribution from 

radio-iodine?



mike



Mike McNaughton

Los Alamos National Lab.

email: mcnaught@LANL.gov or mcnaughton@LANL.gov

phone: 505-667-6130





************************************************************************

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/