**About this Abstract** |

**Meeting** |
**2016 TMS Annual Meeting & Exhibition
** |

**Symposium
** |
**Computational Materials Engineering for Nuclear Reactor Applications
** |

**Presentation Title** |
Microstructure-explicit Rate Theory Modeling of Point Defect Transport during Irradiation Damage |

**Author(s)** |
Jesse J. Carter, Jared M. Tannenbaum, Richard W. Smith |

**On-Site Speaker (Planned)** |
Jesse J. Carter |

**Abstract Scope** |
Rate theory modeling of irradiation damage, as pioneered by Harkness, Dollins, Brailsford, and Bullough has been used to track the behavior of point defects for over 45 years. While more modern methods have emerged to study the detailed interaction of point defects with specific microstructural features, a gap still exists between the atomistic and purely homogeneous continuum levels of focus. This work is aimed at the application of rate equations on the time-scale of diffusion and at a spatial level at which microstructural features and displacement cascades are resolved. Extending previous efforts is facilitated by the use of the MOOSE finite-element multiphysics framework on massively parallel computers. 3D representations of sample microstructure are constructed as solid models to describe the geometry of network dislocations, loops, and grain boundaries within the diffusive medium. Preliminary calculations are discussed in terms of their impact on mechanistic theories of growth and creep. |

**Proceedings Inclusion?** |
Planned: A print-only volume |