United States Nuclear Regulatory Commission - Protecting People and the Environment

Thomas Nicholson

Thomas Nicholson is a Senior Technical Advisor in the Division of Risk Analysis of the Office of Nuclear Regulatory Research (RES) within the U.S. Nuclear Regulatory Commission (NRC). He has worked at the NRC for 33 years, primarily in RES. His principal responsibility is to provide technical advice to NRC management and staff concerning radionuclide transport in the subsurface at NRC-licensed facilities. His work focuses on research in hydrogeologic conceptual model, parameter and scenario uncertainty; application of model abstraction techniques for transport in soils; and accidental radionuclide releases at nuclear power plant sites. He formulated and directed numerous research studies involving integrated ground-water modeling, and subsurface monitoring, modeling and remediation. He serves as co-chair of the U.S. Federal Work Group on Uncertainty and Parameter Estimation under the Memorandum of Understanding on Research in Multimedia Environmental Modeling.

He chairs two NRC Technical Advisory Groups involving Ground-water and Performance Monitoring, and Uncertainty Assessment of Environmental Modeling. He served on the 2006 NRC Lessons Learned Task Force on Liquid Radioactive Release, and the recent Ground-Water Contamination Task Force. He is the NRC appointed member of ANS 2.17 writing committee on Evaluation of Radionuclide Transport in the Subsurface at Commercial Nuclear Power Plants. He worked with NRC Region I Inspectors on evaluation of the ground-water characterization and monitoring studies at the Indian Point Energy Center and Vermont Yankee sites, and with Region III Inspectors on the Braidwood and Dresden nuclear power plant sites. He holds a B.S. in geological sciences from the Pennsylvania State University, and a M.S. in geology from Stanford University. He is a registered geologist in the State of Indiana and a certified Professional Hydrogeologist with the American Institute of Hydrology. He is an active member of the American Geophysical Union, Geological Society of America, American Institute of Hydrology, International Association of Hydrological Sciences, National Ground-Water Association and the International Hydrogeologic Society.

Page Last Reviewed/Updated Thursday, March 29, 2012