scholarly journals Geothermal areas as analogues to chemical processes in the near-field and altered zone of the potential Yucca Mountain, Nevada repository

1995 ◽  
Author(s):  
C.J. Bruton ◽  
W.E. Glassley ◽  
A. Meike
Keyword(s):  
Near Field ◽  
Yucca Mountain ◽  
Chemical Processes ◽  
Altered Zone

scholarly journals Modeling coupled thermal–hydrological–chemical processes in the unsaturated fractured rock of Yucca Mountain, Nevada: Heterogeneity and seepage

2006 ◽  
Vol 31 (10-14) ◽  
pp. 626-633 ◽  
Author(s):  
S. Mukhopadhyay ◽  
E.L. Sonnenthal ◽  
N. Spycher
Keyword(s):  
Fractured Rock ◽  
Yucca Mountain ◽  
Chemical Processes

Evolution of Chemistry and Its Effects on the Corrosion of Engineered Barrier Materials

2006 ◽  
Vol 985 ◽  
Author(s):  
Darrell Dunn ◽  
Yi-Ming Pan ◽  
Xihua He ◽  
Lietai Yang ◽  
Roberto Pabalan
Keyword(s):  
Environmental Conditions ◽  
Environmental Influence ◽  
Near Field ◽  
Yucca Mountain ◽  
High Level Waste ◽  
Seepage Water ◽  
Waste Package ◽  
Barrier Materials ◽  
Engineered Barrier ◽  
High Level

ABSTRACTThe evolution of environmental conditions within the emplacement drifts of a potential high-level waste repository at Yucca Mountain, Nevada, may be influenced by several factors, including the temperature and relative humidity within the emplacement drifts and the composition of seepage water. The performance of the waste package and the drip shield may be affected by the evolution of the environmental conditions within the emplacement drifts. In this study, tests evaluated the evolution of environmental conditions on the waste package surfaces and in the surrounding host rock. The tests were designed to (i) simulate the conditions expected within the emplacement drifts; (ii) measure the changes in near-field chemistry; and (iii) determine environmental influence on the performance of the engineered barrier materials. Results of tests conducted in this study indicate the composition of salt deposits was consistent with the initial dilute water chemistry. Salts and possibly concentrated calcium chloride brines may be more aggressive than either neutral or alkaline brines.

scholarly journals Volume II: near-field and altered-zone environment report

1996 ◽  
Author(s):  
D.G. Wilder
Keyword(s):  
Near Field ◽  
Altered Zone

scholarly journals Near field and altered zone environmental report Volume I: technical bases for EBS design

1997 ◽  
Author(s):  
D. G., LLNL Wilder
Keyword(s):  
Near Field ◽  
Altered Zone

Near-field solubility constraints on radionuclide mobilization and their influence on waste package design

1986 ◽  
Vol 319 (1545) ◽  
pp. 83-95 ◽  
Keyword(s):  
Oxygen Potential ◽  
Chemical Nature ◽  
Near Field ◽  
Chemical Processes ◽  
Low Flow ◽  
Waste Products ◽  
Package Design ◽  
Relative Value ◽  
Chemical Conditions ◽  
Physical And Chemical

The paper addresses the physical and chemical processes that can serve to immobilize waste radionuclides within the confines of an underground repository. These processes, which can be made largely independent of the chemical nature of the host rock, depend for their efficacy upon the maintenance of a very low flow rate of groundwater through the repository constituents. The very long-lived waste products, in particular the actinides, are very insoluble in water under conditions of alkalinity and oxygen potential that will exist in a repository when cement is used as a backfill or as a matrix for the waste. The same chemical conditions tend to favour a fairly long life for steel containers. The paper suggests how these factors may be used to immobilize wastes and draws some conclusions on the relative value of the various engineered features of a repository. Some natural geological analogues are explored as a means of assisting the extrapolation of waste behaviour over very long times.

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