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Publisher Info 1979
Subject Rocky Flats Plant (U.S.)
 Norlin Library--Government Information--McGov  E 1.99:ORNL-5528    LIB USE ONLY
 Norlin Library--Government Information--Micro  ORNL-5528  Nearby Call Numbers  LIB USE ONLY
Series CDPHE Rocky Flats Collection ; 1274
Note CDPHE document number: MO/11/00/79/0/1274
"November 1979"
Abstract A description is given of the capabilities of several models to predict accurately either pollutant concentrations in environmental media or radiological dose to human organs. The models are discussed in three sections: aquatic or surface water transport models, atmospheric transport models, and terrestrial and aquatic food chain models. Using data published primarily by model users, model predictions are compared to observations. This procedure is infeasible for food chain models and, therefore, the uncertainty embodied in the models input parameters, rather than the model output, is estimated. Aquatic transport models are divided into one-dimensional, longitudinal-vertical, and longitudinal-horizontal models. Several conclusions were made about the ability of the Gaussian plume atmospheric dispersion model to predict accurately downwind air concentrations from releases under several sets of conditions. It is concluded that no validation study has been conducted to test the predictions of either aquatic or terrestrial food chain models. Using the aquatic pathway from water to fish to an adult for /sup 137/Cs as an example, a 95% one-tailed confidence limit interval for the predicted exposure is calculated by examining the distributions of the input parameters. Such an interval is found to be 16 times the value of the median exposure. A similar one-tailed limit for the air-grass-cow-milk-thyroid for /sup 131/I and infants was 5.6 times the median dose. Of the three model types discussed in this report,the aquatic transport models appear to do the best job of predicting observed concentrations. However, this conclusion is based on many fewer aquatic validation data than were availaable for atmospheric model validation. (JGB)
Note Available in print and microfiche
Provenance Part of the Rocky Flats document collection at the Colorado Dept. of Public Health and Environment
Format Info Photocopy.
Keywords Radiation effects; nuclide kinetics & toxicology; environment, aquatic; radioactive materials monitoring & transport; aquatic ecosystems & food chains; environment, terrestrial; terrestrial ecosystems & food chains; environment, atmospheric; aquatic ecosystems; radionuclide migration; environmental transport-- mathematical models; human populations-- environmental exposure pathway; human populations-- radiation doses; radioisotopes-- environmental exposure pathway; radioisotopes-- environmental transport; radioisotopes-- radioecological concentration; surface air-- radionuclide migration; terrestrial ecosystems-- radionuclide migration; aquatic organisms; cesium 137; comparative evaluations; fishes; food chains; Gaussian processes; one-dimensional calculations; plumes; probability; surface waters; tables; theoretical data; trajectories; air; alkali metal isotopes; animals; aquatic organisms; beta decay radioisotopes; beta-minus decay radioisotopes; cesium isotopes; data forms; doses; ecological concentration; ecosystems; environmental transport; fluids; gases; information; isotopes; mass transfer; nuclei; numerical data; odd-even nuclei; populations; radioisotopes; vertebrates; years living radioisotopes
Standard Number ORNL-5528
Call Number E 1.99:ORNL-5528
Government Document Call Number E 1.99:ORNL-5528
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