Nonlinear Analytical Models for Interfacial Plug Stresses in Creeping Salt Formation

by Avinash C. Singhal, Arizona State Univ, Tempe, AZ, USA,
Victor H. Veliz, Arizona State Univ, Tempe, AZ, USA,



Document Type: Proceeding Paper

Part of: Nuclear Waste Handling and Storage

Abstract: Analytical and numerical simulation models are presented which predict the nonlinear time dependent behavior of an expanding plug in a creeping environment heavily dependent on the storage room temperature. Extensive sensitivity and parametric studies have been performed. These studies show that the interfacial strains between the concrete plug and surrounding rock-salt are largely influenced by: the time dependent variation in the early modulus of concrete; creep and shrinkage behavior of concrete; creep and borehole convergence behavior of rock-salt; and expansivity characteristics of the plug material.

Subject Headings: Creep | Material properties | Stress analysis | Numerical models | Concrete | Time dependence | Model analysis | Salts

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