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Published in J Environ Qual 9:350-354 (1980)
© 1980 American Society of Agronomy, Crop Science Society of America, and Soil Science Society of America
677 S. Segoe Rd., Madison, WI 53711 USA
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Plutonium in a Grassland Ecosystem at Rocky Flats1

Craig A. Little, F. Ward Whicker and Terrol F. Winsor2

ABSTRACT

Portions of the grassland around the Rocky Flats installation of the U.S. Department of Energy, located about 12 km northwest of the Denver metropolitan area, were contaminated with Pu between 1959 and 1964. This study was designed to elucidate the Pu distribution patterns in the terrestrial ecosystem immediately downwind of the contamination source. We concluded that wind erosion of contaminated soil was likely the chief mechanism of plutonium transport and that soil contained 99.7% of the plutonium in the system. Plant and small animal compartments combined contained less than 0.3% of the total Pu inventory which averaged about 53 µCi/m2 in the study area.

Key Words: plant uptake • concentration ratio • Pu-transport • radionuclides


NOTES

1 Work performed while the senior author was a student in the Dep. of Radiology and Radiation Biology, Colorado State Univ., Ft. Collins, CO 80523. Project funded by ERDA Contract AT-11-(1156) with Colorado State Univ. Union Carbide Corp., under contract with the U.S. Dep. of Energy, aided in preparing the manuscript.

2 Research Associate, Health and Safety Res. Div., Oak Ridge Natl. Lab., Oak Ridge, Tenn.; Professor, Dep. of Radiology and Radiation Biology, Colorado State Univ., Ft. Collins, Colo.; and Research Ecologist, Health Sci. and Environ. Studies, Rockwell Int., Rocky Flats Plant, Golden, Colo.; respectively.

Received for publication August 28, 1979.





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