Re: Determining activity for odd-shaped parts

["Tosh Ushino" <tushino@icnpharm.com>]

Richard,

Depeding on the accuracy of the analysis you want, there are couple of very
simple methods. If you are looking for isotopic, then it would get bit more
complicated. Assuming you only want gross estimation, and if parts are small,
you may want to use a gamma sensitive tool monitor. Be sure to characterize the
energy response of the monitor. Another is to simply step back away from the
object. If you get far enough, everything becomes a point source. If you need
better results, you have to do more in-depth analysis. What is the level of
activity, size/mass of the items, what LLD are you looking for? Do you need
isotopic information?

Tosh Ushino





"Edwards, Richard W" <Richard.Edwards@PSS.Boeing.com> on 03/17/99 09:30:38 AM

Please respond to radsafe@romulus.ehs.uiuc.edu

To:   Multiple recipients of list <radsafe@romulus.ehs.uiuc.edu>
cc:    (bcc: Tosh Ushino/HQ/ICN)
Subject:  Determining activity for odd-shaped parts




We need to determine the activity of some odd shaped parts activated from
exposure to accelerator beamline (some deliberately, some not). Parts vary
widely in size, shape and, to a lesser extent, constituent material. The bulk of
these items are aluminum but we run into steels of various sorts, semi-metals
from circuit boards and other oddities. Does anyone have any experience they can
share with me or references they recommend which will help?


Rick Edwards, Analyst
The Boeing Company
richard.w.edwards@boeing.com
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