Dispersion

[Lester Slaback <Lester.Slaback@NIST.GOV>]

I have a current project of measuring downwind dose rates from Ar-41.  The
first thing I realized is that a steady wind with a constant wind direction
is far from that.  Data collected during a stable met. condition shows an
amazing amount of variability.  Even with constant, stable conditions
plumes wander, resulting in order-of-magnitude changes in dose rates
despite constant source term conditions.

Disclaimer:  the above are the personal musings of the author, and do not
represent any past, present, or future position of NIST, the U.S. government,
or anyone else who might think that they are in a position of authority. 
Lester Slaback, Jr.  [Lester.Slaback@NIST.GOV] 
NBSR Health Physics 
Center for Neutron Research 
NIST
100 Bureau Dr.  STOP 3543 
Gaithersburg, MD  20899-3543 
301 975-5810 voice
301 921-9847 fax
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