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High Temperature Test Laboratory Team Members




David Nigg, Ph.D., Laboratory Fellow Nigg, Ph.D., Laboratory FellowDr. David Nigg has over 30 years of experience in computational and experimental reactor and radiation physics, research reactor applications, medical applications of nuclear and radiological sciences, radiobiology and radiation biophysics, and technical management. Dr. Nigg is a registered Professional Engineer by Examination in the State of Idaho. In 2006, he received the Hatanaka Memorial Award, the highest honor bestowed by the International Society for Neutron Capture Therapy (ISNCT) in recognition of sustained excellence and leadership in NCT research and development. Dr. Nigg& currently leads the INL ATR Modeling, Simulation, and V&V Upgrade initiative.High Temperature Test Laboratory
Richard Skifton, Ph.D. Skifton, Ph.D.Dr. Richard Skifton is an R&D scientists at the INL’s High Temperature Test Laboratory (HTTL). He has expertise in the field of thermofluids; in that vein, helps with PWR prototypic autoclave testing of the HTTL’s various in-pile sensors. Further, he has over six years’ experience at nuclear research facilities in component design, computational simulation, and experimental validation. He holds a Ph.D. from the University of Idaho in Mechanical Engineering.<div class="ExternalClass42A563B8509D4095A7618D62388FA72F"><p>​Skifton, R. S., Davis, K. L., Crepeau, J. C., Solstad, S., “In-Pile Measurements of Fuel Rod Dimensional Changes Utilizing the Test Reactor Loop Pressure for Motion,” 10th International Topical Meeting on Nuclear Plant Instrumentation, Control and Human Machine Interface Technologies, 2017.</p></div>High Temperature Test Laboratory
Kurt Davis, B.S. Davis, B.S.Kurt Davis has more than 20 years experience. Recent work includes the development of micro-CT techniques for the X-ray scanning of solid rocket fuel and high temperature investigations of materials for use in irradiation testing. He is a co-author for the computer codes SCDAP/RELAP5/MOD3.1 and FRAPCON-3 which are used to perform best-estimate safety calculations to describe overall reactor coolant system thermal-hydraulic response, core damage progression during severe accidents, and fuel rod behavior. High Temperature Test Laboratory
Keith Condie, M.S. Condie, M.S.Keith Condie has more than 35 years of experience in experimental test programs. He was a key technical contributor to several INL programs, including the Loss of Fluid Test facility, Semiscale, Savannah River Restart programs, the INL Matched Index-of-Refraction experimental research loop, and a Prototypic Materials Test Program funded by Japan's Nuclear Power Engineering Corporation. High Temperature Test Laboratory
Joshua Daw, Ph.D. Daw, Ph.D.Joshua Daw is a research scientist and engineer at the INL’s High Temperature Test Laboratory where he develops instrumentation for in-core irradiation tests. He currently leads development and deployment efforts for in-core ultrasonic instrumentation. He previously completed an assignment as a visiting researcher at the Norwegian Halden Reactor Project where he led efforts on an instrumented fuel assembly test investigating fission gas release. As a University of Idaho graduate student, he received several recognition awards for his research in high-temperature in-core instrumentation. Dr. Daw holds a PhD in Mechanical Engineering from the University of Idaho. He was awarded the 2013 Laboratory Director's award for exceptional engineering achievement. He has authored or co-authored 12 peer reviewed journal publications and 21 peer-reviewed conference papers on high temperature testing and in-pile instrumentation.High Temperature Test Laboratory
Troy Unruh, Ph.D. Unruh, Ph.D.Troy Unruh has over eight years of experience with reactor operations and experiments. He is currently the ATR Reactor Project Engineer that leads ATR NSUF flux evaluation activities. Mr. Unruh earned an R&D 100 award for research he completed on semiconductor neutron detection at Kansas State University, and he has authored several archival peer-reviewed journal publications and peer-reviewed conference papers. High Temperature Test Laboratory