The study of the long term mechanical behavior of Yucca Mountain tuffs is important for several reasons. Long term stability of excavations will affect accessibility (e.g. for inspection purposes), and retrievability. Long term instabilities may induce loading of drip shields and/or emplaced waste, thus affecting drip shield and/or waste package corrosion. Failure of excavations will affect airflow, may affect water flow, and may affect temperature distributions.
The long term mechanical behavior of “hard” rocks remains an elusive topic, loaded with uncertainties. A variety of approaches have been used to improve the understanding of this complex subject, but it is doubtful that it has reached a stage where firm predictions can be considered feasible.
Nevada – Yucca Mountain; Rock mechanics; Volcanic ash; tuff; etc. -- Mechanical properties; Volcanic ash; tuff; etc. – Permeability;
Civil and Environmental Engineering | Earth Sciences | Geology | Geotechnical Engineering
Daemen, J. J.,
Long-term mechanical behavior of Yucca Mountain tuff and its variability.
Available at: http://digitalscholarship.unlv.edu/yucca_mtn_pubs/17