David Johnson

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David Johnson
Research Affiliate



Dr. Johnson has more than 35 years of experience in risk-based analysis for industry and government applications. His extensive experience and knowledge in all facets of nuclear reactor probabilistic risk assessments (PRA) and expertise include probabilistic modeling and investigation of impacts of industrial endeavors, the development of quantitative risk assessment methods and the practical application of these methods to support risk management.

Karl Fleming

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Karl Fleming
Independent Consultant


M.S. Carnegie Mellon University
B.S. Penn State University

Karl Fleming received his B.S. in Physics from Penn State University, Cum Laude in 1969 and his M.S. in Nuclear Science and Engineering at Carnegie-Mellon University in 1974. He has devoted his entire professional career of 45 years to the advancement and application of PRA technology in the nuclear, chemical, process, and aerospace industries. Following professional and executive level assignments at General Atomics, and Pickard Lowe and Garrick, and ERIN Engineering and Research he established an independent consulting firm in 2001 and continues to be active as an independent consultant.