Methods for Integrating Micro-scale Creep modeling into Finite Element Simulations of Fuel Rods
November 21, 2013 — One of the fundamental challenges of multi-scale modeling is the integration of atomistic-scale effects to continuum scale calculations.
Modeling Irradiation Creep and Growth with VPSC
November 20, 2013 — During service in a commercial power reactor, the components are subjected to high heat and pressure, and bombarded by radiation. The combination of these stressors causes most materials to deform elastically and plastically over time. For zirconium-based alloys, thermal creep, irradiation creep, and irradiation growth are the primary modes of deformation.
Analysis of Two-Dimensional Lattice Physics Verification Problems with MPACT
April 23, 2013 — CASL is developing the Virtual Environment for Reactor Applications (VERA) as a key capability to support the analysis of the CASL Challenge Problems. VERA will include a range of physics modeling capabilities necessary to model reactors, including neutronics, thermal hydraulics, fuel performance, and coolant chemistry.
Mixing and non-stoichiometry in Fe-Ni-Cr-Zn-O spinel compounds: Density functional theory calculations
February 22, 2013 — Density functional theory (DFT) calculations have been employed to better understand the thermodynamic properties of AB2O4 (where A=Fe2+, Ni2+ or Zn2+, and B=Fe3+ or Cr3+) spinel oxides. In particular, spinel pseudo-binary solid solutions have been investigated, e.g. Fe3O4-NiFe2O4, and reactions leading to the formation of non-stoichiometric spinel compounds.