Keith C Bledsoe

Keith C Bledsoe

R&D Staff

Bio

Dr. Keith Bledsoe is a Research and Development Staff Member in the Nuclear Security Modeling Group in the Nuclear Security and Isotope Technology Division at the Oak Ridge National Laboratory.  He received a Bachelor of Science degree in Engineering Physics in 2004, a Master of Science degree in Nuclear Engineering in 2006, and a doctorate degree in Nuclear Engineering in 2009, all from The Ohio State University.  His research interests include inverse transport problems, uncertainty quantification, Markov chain Monte Carlo methods, parameter optimization in nuclear systems, and surrogate modeling.  For over 10 years Dr. Bledsoe has been a primary contributor to the development of the inverse transport tool INVERSE, into which he has implemented advanced optimization/uncertainty quantification methods and implemented parallel processing.  He is also one of the primary developers of the INVERSE graphical user interface.  Dr. Bledsoe also has experience in radiation transport modeling in complex geometries, nuclear fallout modeling, and quantitative imaging methods. 

Publications

Keith C. Bledsoe, Jeffrey A. Favorite, Jordan P. Lefebvre, Robert A. Lefebvre, Matthew A. Jessee, “Application of the DiffeRential Evolution Adaptive Metropolis (DREAM) Method for Uncertainty Quantification in Inverse Transport Problems,” Trans. Am. Nucl. Soc. 111, 743-746 (2014).

Keith C. Bledsoe, Matthew A. Jessee, and Jeffrey A. Favorite, “Application of Generalized Linear Least-Squares for Uncertainty Analysis in Inverse Transport Problems,” Trans. Am. Nucl. Soc., 108, 445-448 (2013).

Keith C. Bledsoe and Jeffrey A. Favorite, “Improved Differential Evolution Implementation for Solving Inverse Transport Problems,” Trans. Am. Nucl. Soc., 109, 781-784 (2013).

Tatiana Ivanova, Cédric Laville, James Dyrda, Dennis Mennerdahl, Yury Golovko, Kirill Raskach, Anatoly Tsiboulia, Gil Soo Lee, Sweng-Woong Woo, Adrien Bidaud, Pouya Sabouri, Amrit Patel, Keith Bledsoe, Bradley Rearden, Jim Gulliford, and Franco Michel-Sendis, “OECD/NEA Expert Group Uncertainty Analysis for Criticality Safety Assessment:  Results of Benchmark on Sensitivity Calculation (Phase III),” Physor 2012 – Advances in Reactor Physics, Linking Research, Industry, and Education, Knoxville, TN, USA, April 15-20, 2012 (CD-ROM).

Keith C. Bledsoe, Jeffrey A. Favorite and Tunc Aldemir, “Using the Levenberg-Marquardt Method for Solutions of Inverse Transport Problems in One- and Two-dimensional Geometries,” Nuc. Tech., 176, 1, 106-126 (2011). 

Keith C Bledsoe, Jeffrey A. Favorite and Tunc Aldemir, “A Comparison of the Covariance Matrix Adaptation Evolution Strategy and the Levenberg-Marquardt Method for Solving Multidimensional Inverse Transport Problems,” Ann. Nucl. Energy, 38, 4, 897-904 (2011). 

Keith C. Bledsoe, Jeffrey A. Favorite and Tunc Aldemir, “Application of the Differential Evolution Method to Solving Inverse Transport Problems,” Nucl. Sci. Eng., 169, 2, 208-221 (2011).

John D. Bess, Keith C. Bledsoe and Bradley T. Rearden, “Evaluation of HEU-Beryllium Benchmark Experiments to Improve Computational Analysis of Space Reactors,” Nuclear & Emerging Technologies for Space (NETS-2011), Albuquerque, NM, Feb. 7-10, 2011 (CD-ROM).

Robert D. Busch and Keith C. Bledsoe, “The Effect of U-234 Content on the Neutronic Behavior of Uranium Systems,” Proc. International Conference on Nuclear Criticality (ICNC) 2011, Edinburgh, Scotland, September 19-22 (2011).

Edward A. Read, Luiz C. Leal, Keith C. Bledsoe, Bernadette L. Kirk, and C. R. E. Oliveira, “Nuclear Data Error Propagation in Fusion Benchmark Calculations,” Trans. Am. Nucl. Soc., 105, 464-465 (2011).

Jeffrey A. Favorite and Keith C. Bledsoe, “Eigenvalue Sensitivity to System Dimensions,” Ann. Nucl. Energy, 37, 4, 522-528 (2010). 

Keith C. Bledsoe and Jeffrey A. Favorite, “A Hybrid Differential Evolution/Levenberg-Marquardt Method for Solving Inverse Transport Problems,” Trans. Am. Nucl. Soc., 102, 213-215 (2010).

Jeffrey A. Favorite, Keith C. Bledsoe, and David I Ketcheson, “Surface and Volume Integrals of Uncollided Adjoint Fluxes and Forward-Adjoint Flux Products,” Nucl. Sci. Eng., 163, 73-84 (2009).

Keith C. Bledsoe, Jeffrey A. Favorite, and Tunc Aldemir, “Solutions of Inverse Transport Problems in Finite Cylindrical Geometries Using the Schwinger Inverse Method,” Ann. Nucl. Energy, 36, 966-973 (2009).

Keith C. Bledsoe and Jeffrey A. Favorite, “A Comparison of the Differential Evolution and Levenberg-Marquardt Methods for Solving Inverse Transport Problems with Several Unknowns in Cylindrical Geometries,” Trans. Am. Nucl. Soc., 101, 411-413 (2009).

Keith C. Bledsoe, “Using Differential Evolution to Solve Inverse Transport Problems in Spherical Geometries,” Los Alamos National Laboratory Research Note, X-1-RN(U)09-12 (LA-UR-09-06202) (2009).

Keith C. Bledsoe and Jeffrey A. Favorite, “Using the Marquardt Method for Solutions of Inverse Transport Problems in Two-Dimensional Cylinders,” Trans. Am. Nucl. Soc., 98, 591-593 (2008).

Jeffrey A. Favorite and Keith C. Bledsoe, “Surface and Volume Integrals of Uncollided Adjoint Fluxes and Forward-Adjoint Flux Products,” Los Alamos National Laboratory Research Note, X-1-RN(U)08-03 (LA-UR-08-4396) (2008).

Jeffrey A. Favorite and Keith C. Bledsoe, “Using the Levenberg-Marquardt Method for the Solution of Inverse Transport Problems with Scattering,” Joint International Topical Meeting on Mathematics & Computations and Supercomputing in Nuclear Applications, Monterey, California, April 15-19, 2007 (CD-ROM).

Keith C. Bledsoe, Jeffrey A. Favorite, and Tunc Aldemir, “Material Identification in Finite Cylindrical Geometries Using the Schwinger Inverse Method,” Trans. Am.  Nucl. Soc., 96, 545-547 (2007).

Jeffrey A. Favorite and Keith C. Bledsoe, “Identification of an Unknown Material in a Radiation Shield Using the Schwinger Inverse Method,” Nucl. Sci. Eng., 152, 106-117 (2006).

Jeffrey A. Favorite and Keith C. Bledsoe, “First-Order Perturbation Theory for the Sensitivity of Jezebel keff to 239Nu-Bar,” Los Alamos National Laboratory Research Note, X-5-RN(U)05-24 (2005).

Jeffrey A. Favorite and Keith C. Bledsoe, "Identification of an Unknown Material in a Radiation Shield Using the Schwinger Inverse Method," Trans. Am. Nucl. Soc., 91, 125-126 (2004).

Keith C. Bledsoe, “Identification of an Unknown Material in a Radiation Shield Using the Schwinger Inverse Method,” Los Alamos National Laboratory Research Note, X-5-RN(U)04-42 (2004).