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Title: An Updated Site Scale Saturated Zone Ground Water Transport Model For Yucca Mountain

Abstract

The Yucca Mountain site scale saturated zone transport model has been revised to incorporate the updated flow model based on a hydrogeologic framework model using the latest lithology data, increased grid resolution that better resolves the geology within the model domain, updated Kd distributions for radionuclides of interest, and updated retardation factor distributions for colloid filtration. The resulting numerical transport model is used for performance assessment predictions of radionuclide transport and to guide future data collection and modeling activities. The transport model results are validated by comparing the model transport pathways with those derived from geochemical data, and by comparing the transit times from the repository footprint to the compliance boundary at the accessible environment with those derived from {sup 14}C-based age estimates. The transport model includes the processes of advection, dispersion, fracture flow, matrix diffusion, sorption, and colloid-facilitated transport. The transport of sorbing radionuclides in the aqueous phase is modeled as a linear, equilibrium process using the Kd model. The colloid-facilitated transport of radionuclides is modeled using two approaches: the colloids with irreversibly embedded radionuclides undergo reversible filtration only, while the migration of radionuclides that reversibly sorb to colloids is modeled with modified values for sorption coefficient and matrixmore » diffusion coefficients. Model breakthrough curves for various radionuclides at the compliance boundary are presented along with their sensitivity to various parameters.« less

Authors:
; ; ; ; ; ; ;
Publication Date:
Research Org.:
Yucca Mountain Project, Las Vegas, Nevada
Sponsoring Org.:
USDOE
OSTI Identifier:
894310
Report Number(s):
NA
MOL.20061017.1015, DC# 48731; TRN: US0700403
DOE Contract Number:  
NA
Resource Type:
Technical Report
Country of Publication:
United States
Language:
English
Subject:
12 MANAGEMENT OF RADIOACTIVE WASTES, AND NON-RADIOACTIVE WASTES FROM NUCLEAR FACILITIES; ADVECTION; COLLOIDS; COMPLIANCE; DIFFUSION; FILTRATION; FLOW MODELS; FRACTURES; GEOLOGY; GROUND WATER; LITHOLOGY; RADIOISOTOPES; RESOLUTION; SENSITIVITY; SORPTION; TRANSPORT; YUCCA MOUNTAIN

Citation Formats

Kelkar, S, Viswanathan, H, Eddebbarrh, A, Ding, M, Reimus, P, Robinson, B, Arnold, B, and Meijer, A. An Updated Site Scale Saturated Zone Ground Water Transport Model For Yucca Mountain. United States: N. p., 2006. Web. doi:10.2172/894310.
Kelkar, S, Viswanathan, H, Eddebbarrh, A, Ding, M, Reimus, P, Robinson, B, Arnold, B, & Meijer, A. An Updated Site Scale Saturated Zone Ground Water Transport Model For Yucca Mountain. United States. doi:10.2172/894310.
Kelkar, S, Viswanathan, H, Eddebbarrh, A, Ding, M, Reimus, P, Robinson, B, Arnold, B, and Meijer, A. Wed . "An Updated Site Scale Saturated Zone Ground Water Transport Model For Yucca Mountain". United States. doi:10.2172/894310. https://www.osti.gov/servlets/purl/894310.
@article{osti_894310,
title = {An Updated Site Scale Saturated Zone Ground Water Transport Model For Yucca Mountain},
author = {Kelkar, S and Viswanathan, H and Eddebbarrh, A and Ding, M and Reimus, P and Robinson, B and Arnold, B and Meijer, A},
abstractNote = {The Yucca Mountain site scale saturated zone transport model has been revised to incorporate the updated flow model based on a hydrogeologic framework model using the latest lithology data, increased grid resolution that better resolves the geology within the model domain, updated Kd distributions for radionuclides of interest, and updated retardation factor distributions for colloid filtration. The resulting numerical transport model is used for performance assessment predictions of radionuclide transport and to guide future data collection and modeling activities. The transport model results are validated by comparing the model transport pathways with those derived from geochemical data, and by comparing the transit times from the repository footprint to the compliance boundary at the accessible environment with those derived from {sup 14}C-based age estimates. The transport model includes the processes of advection, dispersion, fracture flow, matrix diffusion, sorption, and colloid-facilitated transport. The transport of sorbing radionuclides in the aqueous phase is modeled as a linear, equilibrium process using the Kd model. The colloid-facilitated transport of radionuclides is modeled using two approaches: the colloids with irreversibly embedded radionuclides undergo reversible filtration only, while the migration of radionuclides that reversibly sorb to colloids is modeled with modified values for sorption coefficient and matrix diffusion coefficients. Model breakthrough curves for various radionuclides at the compliance boundary are presented along with their sensitivity to various parameters.},
doi = {10.2172/894310},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2006},
month = {9}
}