Thermal-Hydrologic Model Study for an Alternative Waste Package Design for Yucca Mountain Repository

2006 ◽  
Vol 154 (2) ◽  
pp. 247-264 ◽  
Author(s):  
D. Bahrami ◽  
G. Danko
Keyword(s):  
Yucca Mountain ◽  
Hydrologic Model ◽  
Package Design ◽  
Waste Package ◽  
Model Study

scholarly journals Total-System Performance Assessment for the Yucca Mountain Site

2002 ◽  
Vol 713 ◽  
Author(s):  
Michael L. Wilson ◽  
Peter N. Swift ◽  
Jerry A. McNeish ◽  
S. David Sevougian
Keyword(s):  
Performance Assessment ◽  
System Performance ◽  
Safety Assessment ◽  
Yucca Mountain ◽  
Total System ◽  
Package Design ◽  
Waste Package ◽  
Igneous Activity ◽  
Nominal Performance ◽  
High Level

ABSTRACTYucca Mountain, Nevada, is under consideration as a potential site for a repository for high-level radioactive waste. Total-system performance-assessment simulations are performed to evaluate the safety of the site. Features, events, and processes have been systematically evaluated to determine which ones are significant to the safety assessment. Computer models of the disposal system have been developed within a probabilistic framework, including both engineered and natural components. Selected results are presented for three different total-system simulations, and the behavior of the disposal system is discussed. The results show that risk is dominated by igneous activity at early times, because the robust waste-package design prevents significant nominal (non-disruptive) releases for tens of thousands of years or longer. The uncertainty in the nominal performance is dominated by uncertainties related to waste-package corrosion at early times and by uncertainties in the natural system, most significantly infiltration, at late times.

Second generation waste package design and storage concept for the Yucca Mountain Repository

2006 ◽  
Vol 236 (24) ◽  
pp. 2589-2598 ◽  
Author(s):  
Joseph Sam Armijo ◽  
Piyush Kar ◽  
Manoranjan Misra
Keyword(s):  
Second Generation ◽  
Yucca Mountain ◽  
Package Design ◽  
Waste Package ◽  
And Storage

scholarly journals Yucca Mountain Project waste package design for MRS [Monitored Retrievable Storage] system studies

1989 ◽  
Author(s):  
T. Nelson ◽  
E. Russell ◽  
G. L. Johnson ◽  
R. Morissette ◽  
D. Stahl ◽  
...  
Keyword(s):  
Storage System ◽  
Yucca Mountain ◽  
Package Design ◽  
Waste Package ◽  
Monitored Retrievable Storage

scholarly journals YUCCA MOUNTAIN WASTE PACKAGE CLOSURE SYSTEM

2005 ◽  
Author(s):  
G. Housley ◽  
C. Shelton-davis ◽  
K. Skinner
Keyword(s):  
Yucca Mountain ◽  
Closure System ◽  
Waste Package

scholarly journals Evaluation of the Corrosivity of Dust Deposited on Waste Packages at Yucca Mountain, Nevada

2006 ◽  
Vol 932 ◽  
Author(s):  
Charles Bryan ◽  
Russell Jarek ◽  
Thomas Wolery ◽  
David Shields ◽  
Mark Sutton ◽  
...  
Keyword(s):  
Corrosion Product ◽  
Experimental Studies ◽  
Yucca Mountain ◽  
Localized Corrosion ◽  
Small Droplet ◽  
Waste Package ◽  
Physical Isolation ◽  
Salt Minerals ◽  
Dry Out ◽  
Diffusive Gradients

ABSTRACTPotentially corrosive brines can form during post-closure by deliquescence of salt minerals in dust deposited on the surface of waste packages at Yucca Mountain during operations and the pre-closure ventilation period. Although thermodynamic modeling and experimental studies of brine deliquescence indicates that brines are likely to form, they will be nitrate-rich and noncorrosive. Processes that modify the brines following deliquescence are beneficial with respect to inhibition of corrosion. For example, acid degassing (HCl, HNO3) could dry out brines, but kinetic limitations are likely to limit the effect to increasing their passivity by raising the pH and increasing the NO3/Cl ratio.Predicted dust quantities and maximum brine volumes on the waste package surface are small, and physical isolation of salt minerals in the dust may inhibit formation of eutectic brines and decrease brine volumes. If brines do contact the WP surface, small droplet volumes and layer thicknesses do not support development of diffusive gradients necessary for formation on separate anodic-cathodic zones required for localized corrosion. Finally, should localized corrosion initiate, corrosion product buildup will stifle corrosion, by limiting oxygen access to the metal surface, by capillary retention of brine in corrosion product porosity, or by consumption of brine components (Cl−).

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