Document Details

Technical Report 21 to the U.S. Atomic Energy Commission Contract No. AT-(11-1)-490: Radioactivity Transport in Water--Continuous Release of Radionuclides in a Small-Scale Ecosystem
Subject Terms:
Ecological Systems; Radionuclide; River Systems
Document Location:
DOE INFORMATION CENTER 1 Way, Oak Ridge, TN 37831; Eva Butler; Phone: 865-241-4780; Toll-Free: 800-382-6938, Option 6; FAX: 865-574-3521; Email:
Document Categories:
Health, Safety and Environment\Environmental Effects
Document Type:
Publication Date:
1971 Sep 30
Declassification Status:
Never classified
Document Pages:
Accession Number:
Document Number(s):
HRE 1384
Originating Research Org.:
University of Texas
OpenNet Entry Date:
1995 Jul 31
Model rivers were simulated in two channels of a research flume. The control channel of the model river system contained a typical bottom sediment and received a potable water supply. The second channel, in addition to bottom sediment, contained a lush community of rooted aquatic plants in one end and received water which was rich in phytoplankton. Both channels were subjected to a continuous release of radionuclides for periods up to thirty-five days. The distribution of the radionuclides in the bottom sediment, plants, algae, and water was determined. Under the conditions of the release, less than maximum permissible concentration, the radioactivity continued to increase on the surface of bottom sediments until a quasi-equilibrium level was reached at approximately 25 days aftr initiation of release. At this condition or saturation, in the cse of rooted plants, quasi-equilibrium for radionuclides was reached within two days. The plant weight was based on oven-dried mass. In the phytoplankton-rich water, it was found that as much as 27 percent of the radioactivity of the water was actually contained on or in the phytoplankton. The rate of uptake by the phytoplanton was related to net photosynthetic oxygen production. The experimentally-determined parameters were applied to predictive models and these relationships were checked against some observed data.

<< Return to Search Results