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Title: Demonstration of performance modeling of a low-level waste shallow-land burial site: A comparison of predictive radionuclide transport modeling versus field observations at the ''A''disposal area, Chalk River Nuclear Laboratories

Abstract

Before a license can be obtained to construct a facility for the shallow-land burial of low-level wastes, the US Nuclear Regulatory Commission must be assured that the facility will meet both performance objectives and prescriptive requirements set forth in 10CFR61, ''Licensing Requirements for Land Disposal of Radioactive Waste.'' Subpart D, Section 61.50(a) (2) of 10CRF61 states that a ''disposal site shall be capable of being characterized, modeled, analyzed and monitored.'' In order to test the concept of ''site modelability,'' a 33-year old low-level radioactive waste disposal site, the ''A'' Disposal Area, at Chalk River Nuclear Laboratories (CRNL), Canada, was used as a field location for evaluating the process of site characterization and the subsequent modeling prediction of radionuclide transport from the site by groundwater. This report is the second of two such evaluations and was performed by comparing the actual measured radionuclide migration with predicted migration estimated from hydrologic/radionuclide transport modeling. Using a temporally varying /sup 90/Sr retardation factor to account for changing concentrations of acidity and competing ions in the source materials, a reasonably good agreement was obtained between observed and predicted /sup 90/Sr migration in the groundwater. However, trace amounts of /sup 137/Cs and /sup 239/minus/240/Pu have migratedmore » faster than expected at this site. 31 refs., 54 figs., 15 tabs.« less

Authors:
; ; ; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Nuclear Regulatory Commission, Washington, DC (USA). Div. of Engineering; Pacific Northwest Lab., Richland, WA (USA)
OSTI Identifier:
6283047
Report Number(s):
NUREG/CR-4879-Vol.2; PNL-6175-Vol.2
ON: TI89009566
DOE Contract Number:  
AC06-76RL01830
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; 11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS; CHALK RIVER NUCLEAR LABS; SITE CHARACTERIZATION; LOW-LEVEL RADIOACTIVE WASTES; RADIOACTIVE WASTE DISPOSAL; RADIOACTIVE WASTE FACILITIES; CESIUM 137; COMPUTERIZED SIMULATION; FISSION PRODUCTS; HYDROLOGY; LICENSING; RADIATION MONITORING; RADIATION TRANSPORT; RADIOISOTOPES; RADIONUCLIDE MIGRATION; REGULATIONS; SAMPLING; SOIL MECHANICS; STRONTIUM 90; ALKALI METAL ISOTOPES; ALKALINE EARTH ISOTOPES; ATOMIC ENERGY OF CANADA LTD; BETA DECAY RADIOISOTOPES; BETA-MINUS DECAY RADIOISOTOPES; CANADIAN ORGANIZATIONS; CESIUM ISOTOPES; ENVIRONMENTAL TRANSPORT; EVEN-EVEN NUCLEI; INTERMEDIATE MASS NUCLEI; ISOTOPES; MANAGEMENT; MASS TRANSFER; MATERIALS; MECHANICS; MONITORING; NATIONAL ORGANIZATIONS; NUCLEAR FACILITIES; NUCLEI; ODD-EVEN NUCLEI; RADIOACTIVE MATERIALS; RADIOACTIVE WASTES; SIMULATION; STRONTIUM ISOTOPES; WASTE DISPOSAL; WASTE MANAGEMENT; WASTES; YEARS LIVING RADIOISOTOPES; 510300* - Environment, Terrestrial- Radioactive Materials Monitoring & Transport- (-1989); 053000 - Nuclear Fuels- Environmental Aspects; 520300 - Environment, Aquatic- Radioactive Materials Monitoring & Transport- (1989)

Citation Formats

Robertson, D.E., Bergeron, M.P., Holford, D., Abel, K.H., Thomas, C.W., Myers, D.A., Champ, D.R., Killey, R.W.D., Moltyaner, G.L., Young, J.L., and Ohnuki, T. Demonstration of performance modeling of a low-level waste shallow-land burial site: A comparison of predictive radionuclide transport modeling versus field observations at the ''A''disposal area, Chalk River Nuclear Laboratories. United States: N. p., 1989. Web.
Robertson, D.E., Bergeron, M.P., Holford, D., Abel, K.H., Thomas, C.W., Myers, D.A., Champ, D.R., Killey, R.W.D., Moltyaner, G.L., Young, J.L., & Ohnuki, T. Demonstration of performance modeling of a low-level waste shallow-land burial site: A comparison of predictive radionuclide transport modeling versus field observations at the ''A''disposal area, Chalk River Nuclear Laboratories. United States.
Robertson, D.E., Bergeron, M.P., Holford, D., Abel, K.H., Thomas, C.W., Myers, D.A., Champ, D.R., Killey, R.W.D., Moltyaner, G.L., Young, J.L., and Ohnuki, T. Wed . "Demonstration of performance modeling of a low-level waste shallow-land burial site: A comparison of predictive radionuclide transport modeling versus field observations at the ''A''disposal area, Chalk River Nuclear Laboratories". United States.
@article{osti_6283047,
title = {Demonstration of performance modeling of a low-level waste shallow-land burial site: A comparison of predictive radionuclide transport modeling versus field observations at the ''A''disposal area, Chalk River Nuclear Laboratories},
author = {Robertson, D.E. and Bergeron, M.P. and Holford, D. and Abel, K.H. and Thomas, C.W. and Myers, D.A. and Champ, D.R. and Killey, R.W.D. and Moltyaner, G.L. and Young, J.L. and Ohnuki, T.},
abstractNote = {Before a license can be obtained to construct a facility for the shallow-land burial of low-level wastes, the US Nuclear Regulatory Commission must be assured that the facility will meet both performance objectives and prescriptive requirements set forth in 10CFR61, ''Licensing Requirements for Land Disposal of Radioactive Waste.'' Subpart D, Section 61.50(a) (2) of 10CRF61 states that a ''disposal site shall be capable of being characterized, modeled, analyzed and monitored.'' In order to test the concept of ''site modelability,'' a 33-year old low-level radioactive waste disposal site, the ''A'' Disposal Area, at Chalk River Nuclear Laboratories (CRNL), Canada, was used as a field location for evaluating the process of site characterization and the subsequent modeling prediction of radionuclide transport from the site by groundwater. This report is the second of two such evaluations and was performed by comparing the actual measured radionuclide migration with predicted migration estimated from hydrologic/radionuclide transport modeling. Using a temporally varying /sup 90/Sr retardation factor to account for changing concentrations of acidity and competing ions in the source materials, a reasonably good agreement was obtained between observed and predicted /sup 90/Sr migration in the groundwater. However, trace amounts of /sup 137/Cs and /sup 239/minus/240/Pu have migrated faster than expected at this site. 31 refs., 54 figs., 15 tabs.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1989},
month = {3}
}

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