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Engineering Physics Colloquium

Tuesday, April 16

11:55 AM to 11:55 AM

106 Engineering Research Building

Speaker: Dr. Paul A. Demkowicz, Idaho National Laboratory
"Development and Performance Testing of Coated Particle Fuel for the Very High Temperature Gas-Cooled Reactor"
Abstract: Modern tristructural isotropic (TRISO) fuel is extremely robust and capable of excellent fission product retention at normal reactor operating conditions and during high temperature accident scenarios where fuel temperature can peak near 1600°C or beyond. Development and testing of TRISO fuel is being performed in the US as part of the Very High Temperature Gas-Cooled Reactor (VHTR) project. This includes fuel fabrication, irradiation, and post-irradiation examination to assess fuel performance. The results of the first irradiation test have been very promising, with zero particle failures in-pile and low release of fission products through the TRISO coatings. Postirradiation examination of the fuel is providing an unprecedented level of information on fuel behavior in-pile, including characterization of kernel and coating microstructures, migration of fission products in the coating layers, and examination of specific particle defects that can lead to elevated fission product release. This presentation will provide an overview of the VHTR fuels program and discuss some of the latest results from irradiation testing and post-irradiation examination.
Biography: Dr. Paul Demkowicz is a Distinguished Staff Scientist at the Idaho National Laboratory. He holds a BS degree in Ceramic Engineering from the University of Washington and MS and PhD degrees in Materials Science and Engineering from the University of Florida. He has worked at the Idaho National Laboratory for the last 10 years, where his current focused is on the development and characterization of fuels for advanced nuclear reactors. Dr. Demkowicz is the technical lead for the post-irradiation examination and high temperature safety testing of coated particle fuel for the Very High Temperature Reactor project.
Event Note: 3:45pm refreshments will be served