Document Details

Estimates of Release Rates of Radionuclides from Burial Grounds at ORNL
Subject Terms:
SWSA, release rate; dose-assessment, waste; nuclear, ORNL, disposal site; radionuclides, burial grounds
Bates, L.D.
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\Waste Management
Document Type:
Publication Date:
1988 Jun 13
Declassification Status:
Never classified
Document Pages:
Accession Number:
Document Number(s):
Originating Research Org.:
Oak Ridge National Laboratory
OpenNet Entry Date:
1998 Jun 16
This document concerns estimates of release rates of radionuclides from Burial Grounds at ORNL. In the absence of validated models, source terms (rates of release of radionuclides from disposal facilities) were estimated, in principle, on the basis of observations of facility performance. Measurement of the relevant time-series data over a period of at least a few years may be particularly important for estimation of the source term. The analysis focused on release rates of radionuclides from Solid Waste Storage Areas (SWSAs) 3 - 6 and from the pits and trenches used for disposal of liquid wastes. A principal source of uncertainty in estimating fractional release rates of radionuclides from disposal facilities for solid wastes was the general lack of data on inventories of radionuclides at disposal. Conclusions drawn from the results were (1) it is likely that both Sr-90 and Cs-137, which have been disposed of in large quantities, have been retained to a high degree within the boundaries of ORNL; (2) tritium appears to be highly mobile in the environment, and past disposal practices probably have not provided significant retention of this radionuclide; (3) transuranic radionuclides probably have been retained to a high degree within the boundaries of ORNL, but evidence for this is considerably less convincing than in the case of Sr-90 and Cs-137 because of the lesser information available; and (4) the available data for uranium, Tc-99 and Th-232 do not appear sufficient to perform a credible analysis of release rates from ORNL burial grounds.

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