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A Transient Thermal And Structural Analysis Of Fuel In The Annular Core Research Reactor, Elliott Pelfrey
A Transient Thermal And Structural Analysis Of Fuel In The Annular Core Research Reactor, Elliott Pelfrey
Mechanical Engineering ETDs
The health of a nuclear reactor’s fuel is essential to the operational longevity of the reactor. The health of the fuel in the Annular Core Research Reactor (ACRR) is a topic of increased interest due to both a proposed new facility that would include the ACRR and the recent resurfacing of contradictory reports regarding thermal stresses in its fuel pellets. Unlike other reactor fuels, which are widely used and well-characterized, the fuel in the ACRR is unique. The ACRR’s fuel elements consist of UO2-BeO fuel pellets, fluted niobium refractory liners, and stainless-steel cladding. The purpose of this thesis …
Evaluation Of Concrete Constitutive Models For Impact Simulations, Guillermo A. Mata
Evaluation Of Concrete Constitutive Models For Impact Simulations, Guillermo A. Mata
Mechanical Engineering ETDs
The research documented in this thesis deals with computational analysis of reinforced concrete impacted by both hollow and solid missiles as a continuing effort on the work conducted by the Committee on the Safety of Nuclear Installations (CSNI) and Nuclear Energy Agency (NEA). The analysis focuses on comparing two similar material models and their ability to capture the mechanistic response of a reinforced concrete slab subjected to impact loads. The analysis was performed using the Sandia National Laboratories computing software SIERRA Solid Mechanics to run the finite element model. The two constitutive models studied were the Holmquist-Johnson-Cook and Johnson-Holmquist 2 …