Dr. Daniel Clayton is a Distinguished Member of the Technical Staff at Sandia National Laboratories in Albuquerque, New Mexico. He is the Project Manager of the Radioisotope Power Systems Launch Safety group, simulating and predicting behavior of nuclear components during space launch accidents at Sandia. Most recently his team produced the Final Safety Analysis Report in support of the Mars 2020 mission. He also is the principle investigator for analyses of severe accidents in nuclear power plants and nuclear facilities and the environmental transport of radiological releases, as well as the health and economic consequences of such releases. Dr. Clayton received his B.S. and Ph.D. degrees in Chemical Engineering from Brigham Young University. His areas of expertise include atmospheric transport and dispersion, CFD modeling, consequence analysis, launch accident sequencing, model development/coding, and risk assessments.