THANS17
si/4AP- 77
BATTELLE $81 NORTHWEST
BATTELLE MEMORIAL INSTITUTE
8 0
8OX 999
PACIFIC NORTHWEST LABORATORIES
RICHLAND WASHINGTON 99352
March 12,
Dr. Rudolf J. Engelmann
Chief, Fallout Studies Branch
Division of Biology and Medicine
U. S. Atomic Energy Commission
Washington, D.
C.
20545
TELEPHONE 509-942-1111
- 407811
1971
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Dear Rudy:
I am replying to your January 21, 1971 letter asking
for a reply to G. P. Dix's January 6, 1971 questions to you
on particle resuspension for the Transit Program.
Very little new experimental resuspension data have
been generated since the SNAP-27 Meteorological Working Group
report.
These results will be discussed together with out
additional questions and thoughts on resuspension.
The crux of these new questions is the determination
of whether we are only interested in the immediate inhalation
hazard or are also interested in the long-term particle
Migration by saltation and surface creep.
These particles
may not present an immediate inhalation hazard, but subsequently these larger particles could become the sources
for a new inhalation hazard.
This long-term surface migration of particles cannot be handled within existing diffusion
models unless we also develop a model for describing particle
translocation by saltation and surface creep.
This new
model would require a matching of airborne particle concen-
trations and concentration profiles at an interface above
which conventional diffusion models are applicable.
The following answers are supplied in direct response
to the questions which were asked during the review of the
Transit Program.
1.
Some additional work has been reported on particle
resuspension since the November 29, 1968 draft of
the SNAP-27 Meteorological Working Group Paper.
In
Project Schooner, a 31-kt cratering detonation was
.
OPERATING THE PACIFIC NORTHWEST LABORATORY FOR THE UNITED STATES ATOMIC ENERGY COMMISSION
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