The current Site Recommendation study for the proposed high level nuclear waste repository at Yucca Mountain locates the repository emplacement drifts approximately 81% within the lower lithophysal unit of the Topopah Springs Formation (Tptpll), 4% within the upper lithophysal unit of the Topopah Springs Formation (Tptpul), and roughly 15% within the middle, non-lithophysal unit (Tptpmn) of the same formation. A major geomechanical issue facing the Yucca Mountain Project is to understand the thermomechanical behavior of lithophysal tuff, which comprises roughly 85% of the repository host rock.
Geological repositories; Nevada – Yucca Mountain; Radioactive waste repositories; Volcanic ash, tuff, etc.
Geology | Volcanology
Islam, M. S.,
Smiecinski, A. J.,
Keeler, R. E.
Influence of Lithophysae Geometry and Distribution on Mechanical Properties of Topopah Spring Tuff.
Available at: http://digitalscholarship.unlv.edu/yucca_mtn_pubs/120