taken around the Rocky Flats, Colorado Plant.
EPA samples discussed in
the report were those from 1l~cm and 5-cm depth, together with some EPA
soil profile sample data.
The project was undertaken in an attempt to
resolve differences in reported data due to soil sampling techniques
employed by those agencies/institutions participating in the project.
A
discussion is included concerning Cs-137 in soil, with data tables for
Cs-137 and Pu-239,
Golchert and Sedlet of Argonne National Laboratory presented a discussion
of resuspension studies on fallout-level plutonium.
Measurements of
plutonium concentrations in air calculated at Argonne are compared with
data from GMX-5, Nevada Test Site.
An Anderson 2000 Impactor was used
to collect particles for analysis for comparison of particle size with
concentration (distribution) of plutonium.
Table I of their paper
includes resuspension factors calculated for thorium-228, thorium-230,
thorium-232, uranium, and plutonium—-239,240 used in their comparisons.
In efforts to characterize environmental transport of plutonium deposited
by the Trinity event, a preliminary model for wind movement was discussed
by Gallegos, Los Alamos Scientific Laboratory.
His paper summarizes
dust flux data for a Trinity ground zero site location near the crater
along the fallout pathway and examines the relationship between soil and
plutonium flux, using analysis of variance and regression analysis
methods,
Environmental in-field and tm sttu instruments are being developed by
Rockwell-Hanford Operations and were reported by Bruns.
The systems
are designed for use in areas of waste management of radioactive materials.
Following migration of radionuclides, identification of contaminated
regions, measurement of void volumes (such as potential cave-ins where
old waste material was buried and have decayed or disintegrated and may
collapse), gas buildup due to radiolysis, density, porosity, moisture
content, elemental assay, and down hole radionuclide assay are a few of
the uses of the Rockwell instrumentation systems in im sttu situations.
Sehmel, Battelle Pacific Northwest Laboratory, discussed measurements of
airborne plutonium-239 and americium-241 transport, data obtained from
the 125 M Hanford meteorological tower.
The experiment was conducted to
obtain a better understanding of possible differences in resuspension
for the two different nuclides.
After measurements of both nonrespirable
and small particles at six heights from the meteorological tower, results
indicated that plutonium-239 was transported on nonrespirable and "small"
particles at all heights. Concentrations of americium-241 on small
particles were maximum at the 9l-m height.
An apparent correlation was
indicated between transport of americium-241 on small particles and
plutonium-239 transport on large particles.
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