46, Shinn, J. H., and L. R. Anspaugh. 1975. “Resuspension -- New Results in Predicting the Vertical Dust Flux." In: Radioecology of Plutonium and Other Transuranics in Desert Environments. M. G. White and P. B. Dunaway (Eds.). 47. 4a, Stannard, J. N. 1973. Report NVO-153. "Plutonium In The Environment." FOLIAR AND ROOT PATHWAYS OF PLUTONIUM CONTAMINATION OF VEGETATION pp. 207-215. In: Uranium, Plutonium, Transplutonic Elements. (H. C. Hodge, Jd. N. Stannard and J. B. Hirsh (Eds.). Springer Verlag, New York, N.Y. R. C. Dahlman* and -Tamura, T. 1974. “Distribution and Characterization of Plutonium in Soils from the Nevada Test Site." In: The Dynamics of Plutonium K. W. McLeod** in Desert Environments. P. B. Dunaway and M. G. White (Eds.}. Report NVO-142. pp. 29-42. 49. Tamura, T. 1975. “Distribution and Characterization of Plutonium 50. Tamura, T. 1976. "Physical and Chemical Characteristics of in Soils from the Nevada Test Site." J. Environ. Quality 4: Plutonium in Existing Contaminated Soils and Sediments." Transuranium Nuclides in the Environment. 51. 52. Report LA 4756. Volehok, H. L., R.- Knuth, and M. T. Kleiman. in the Neighborhood of Rocky Flats, Colorado: Particles." Doe In: IAEA, Vienna. pp. 213-229. Volchok, H. L. 1971. "Resuspension of *°’Pu in the Vicinity of Rocky Flats." 1972. Report HASL-246. “Plutonium Airborne Respirable Wallace, A., and BE. M. Romney. 1975. "Feasibility and Alternate Procedures for Decontamination and Post-Treatment Management of Pu-Contaminated Areas in Nevada." In: The Radioecology of Plutonium and Other Transuranics in Desert Environments. M. G, White and P. B. Dunaway (Eds.). Report NVO 153. pp. 251-337. ak ABSTRACT 350-355. weapons Plutonium enters the terrestrial environment from testing of nuclear depends on and from nuclear technologies, Assimilation of Pu by vegetation Pu sources in source term characteristics and mode of exposure to different facilities, the environment. For Pu released to the atmosphere from fRuclear for most of the direct deposition of airborne particles on foliage accounts Assimtlation of Pu via the roots incipient contamination of vegetation. lower by at generally yields Pu concentrations in edible tissues that are humans will depend least an order of magnitude; however, lifetime exposure of These concepts increasingly on the entry of Pu into foods by the root pathway. environments at are confirmed from information obtained from contaminated for ingestion of Savannah River and Oak Ridge, Radiologic doses calculated airborne Pu on Pu-contaminated vegetables show that direct deposition of than those for Pu assimisurfaces yields doses that are a factor of ten higher tated into the plants by roots. Whicker, F. W., ©. A. Little, and T. F. Winser. 1973. "Plutonium Behavior in the Terrestrial Environs of the Rocky Flats Installation.” INTRODUCTION In: Environmental Surveillance Around Nuclear Installations. Vol. II. TIARA, Vienna. pp. 89-103. 5D. Wildung, R. E., H. Drucker, and F. H. F. Au. 1977. "The Relationship of Microbial Proceses to the Fate of Transuranic Elements in Soil." Presented at the Nevada Applied Ecology Group Symposium on The Dynamics of Transuranics in Terrestrial and Aquatic Environments, Gatlinburg, TN, October 5-7, 1976. (This Report). ADDITIONAL REFERENCE Plant Panel. 1975. Workshop on Environmental Research, Seattle, Washington, November 12-14. U. S. ERDA 76/134. fallout from atmoEnvironmental plutonium (Pu) originates from two sources: facilities. spheric nuclear testing and emissions from nuclear fuel cycle extensive weapons Fallout from nuclear testing will likely decrease unless from the nuclear testing in the atmosphere is resumed, but future emissions potential radiological fuel cycle may increase as a result of Pu recycling. The in the environment toxicity and long half-life of Pu dictate that its behavior be thoroughly understood. , Oak Ridge, TN *Environmental Sciences Division, Oak Ridge National Laboratory **kSavannah River Ecology Laboratory, Aiken, SC 302 303