Dr. Steven Hamilton is the Group Leader of the Radiation Transport and HPC Methods group at ORNL. He completed his B.S. and M.S. degrees in Nuclear Engineering at Georgia Tech in 2006 and 2007, respectively. From 2007 to 2011, he was a recipient of the DOE Computational Science Graduate Fellowship, and completed his Ph.D. in Computational Mathematics at Emory University in 2011. Since 2011, he has worked in the Radiation Transport and HPC Methods group as a developer on the Denovo deterministic and Shift Monte Carlo radiation transport codes.
Steven’s research interests are in the development of numerical algorithms for radiation transport, computational fluid dynamics, and multiphysics. He has worked on applying subspace eigenvalue solvers and Krylov linear solvers to the solution of deterministic transport problems and has investigated the use of advanced nonlinear solvers for coupled multiphysics problems arising in nuclear reactor physics. Steven led the effort to adapt the Shift Monte Carlo solver to operate on GPUs for use on high performance computing platforms such as ORNL’s Frontier supercomputer. From 2017 to 2023, Steven was the primary investigator for the ExaSMR project within the Applications Development area of the Exascale Computing Project (ECP). Through collaboration with Argonne National Laboratory, MIT, and Idaho State University, the ExaSMR helped advance the state of predictive numerical simulation of small modular reactors (SMRs) by enabling coupled simulations involving Monte Carlo radiation transport and computational fluid dynamics solvers.
