May 2012

Conference Paper

Full Core Reactor Analysis: Running Denovo on Jaguar

By:
Jarrell, Joshua J; Godfrey, Andrew T; Evans, Thomas M; Davidson, Gregory G
Publication Date:
May 2012
Conference Name:
PHYSOR 2012: Advances in Reactor Physics Linking Research, Industry, and Education
Conference Location:
Knoxville, Tennessee, United States of America

Abstract

Fully-consistent, full-core, 3D, deterministic simulations using the orthogonal mesh code Denovo were run on the massively parallel computing architecture Jaguar XT5. Using energy and spatial parallelization schemes, Denovo was able to efficiently scale to over 160k processors. Cell-homogenized cross-sections were used with Step-Characteristics, Linear-Discontinuous Finite Element, and Tri-Linear-Discontinuous Finite Element spatial methods. It was determined that using the finite element methods gave considerably more accurate eigenvalue solutions for large aspect ratios meshes than those using Step-Characteristics.