Radionuclide export and elimination by coyotes at two radioactive waste disposal areas in southeastern Idaho

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Coyote fecal samples were collected near a radioactive waste leaching pond and a solid radioactive waste disposal facility and analyzed for radioactivity. Elevated concentrations of Cs-137, Sr-90 and PU-238 in the samples from the liquid radioactive waste leaching area were attributed to coyotes ingesting contaminated pond water and/or small mammals. Elevated Am-241 concentrations in coyote fecal samples collected around the solid radioactive waste disposal facility were due to ingestion of contaminated small mammals. Assumptions relative to the coyote use of these areas permitted an estimate of the maximum quantity of radioactivity exported and eliminated around the facilities. An annual total of 7.2, 31.4 and 1.8 [mu]Ci (Sr-90, Cs-137, Pu-238, Pu-239, Pu-240, Am-241, Cm-242 and Cm-244) was eliminated by coyotes within a 6.3 km radius of the solid radioactive waste disposal facility, liquid waste leaching pond, and control area, respectively. These quantities of radioactivity eliminated by coyotes were similar or less than quantities transported by other mechanisms such as waterfowl and vegetative uptake of radioactivity. Coyotes are a mode of radionuclide transport from the two radioactive waste disposal areas; however, due to the low radionuclide concentrations and low yearly radionuclide inventories in coyote fecal samples, it is doubtful that any significant environmental consequences occur as a result of this transport mechanism.

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Reference Code: A82ART01IDUS

Full Citation: Arthur, W. J., III, and O. D. Markham. 1982. Radionuclide export and elimination by coyotes at two radioactive waste disposal areas in southeastern Idaho. Health Physics 43(4): 493-500.

Location: ANIMAL EF: MAMMALS