@article{3b701e84566a44dfbfd6adb26dc8e831,
title = "High temperature validation of a line heat source technique for in-pile thermal conductivity determination",
abstract = "In-pile instrumentation is critical for advancing operations and materials discovery in the nuclear industry. Ensuring optimal performance of sensors in high temperatures is the first step in demonstrating their viability in the harsh in-pile environment. This work demonstrates the high temperature capabilities of a line heat source and measurement technique previously shown to extract thermal conductivity of nuclear fuel sized samples within a laboratory environment at room temperature. This method uses a hybrid AC/DC measurement technique to obtain rapid measurements of the temperature dependent voltage change of a heater wire, which also acts as a resistance thermometer. Once the temperature profile of the heating element is extracted it is matched to a multilayered analytical model to determine the thermal conductivity of the sample. Measurements are conducted over a range of temperatures to extract the thermal conductivity as a function of temperature for 10 mm diameter 6061 aluminum samples. Each measurement had a coefficient of correlation (R2) value higher than 0.995 when matched to its corresponding analytical model. The thermal diffusivity values for each temperature are also identified and reported. Microstructure analysis was also conducted to further characterize the material measured.",
keywords = "High temperature, In-pile, Thermal conductivity, Transient line source method",
author = "Katelyn Wada and Allyssa Bateman and Varghese, \{Tony Valayil\} and Austin Fleming and Jaques, \{Brian J.\} and David Estrada",
note = "Funding Information: This work was prepared as an account of work sponsored by the U.S. Department of Energy, Office of Nuclear Energy Advanced Sensors and Instrumentation program under DOE Contract DE- AC07-05ID14517. Neither the U.S. Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness, of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. References herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the U.S. Government or any agency thereof. Additionally, this material is based upon work supported under a University Nuclear Leadership Program Graduate Fellowship through the Department of Energy , Office of Nuclear Energy . Further acknowledgements go to Sandeep Dhakal for providing the tensile measurement process parameters for Dr. Harold Ackler's Instron 5984, in the Materials Teaching Laboratory at Boise State University, and custom fixtures made by Philip Boysen. Funding Information: The authors declare the following financial interests/personal relationships which may be considered as potential competing interests:David Estrada reports equipment, drugs, or supplies was provided by US Department of Energy. Katelyn Wada reports financial support was provided by US Department of Energy.This work was prepared as an account of work sponsored by the U.S. Department of Energy, Office of Nuclear Energy Advanced Sensors and Instrumentation program under DOE Contract DE- AC07-05ID14517. Neither the U.S. Government nor any agency thereof, nor any of their employees, makes any warranty, expressed or implied, or assumes any legal liability or responsibility for the accuracy, completeness, or usefulness, of any information, apparatus, product, or process disclosed, or represents that its use would not infringe privately owned rights. References herein to any specific commercial product, process, or service by trade name, trademark, manufacturer, or otherwise, does not necessarily constitute or imply its endorsement, recommendation, or favoring by the U.S. Government or any agency thereof. The views and opinions of authors expressed herein do not necessarily state or reflect those of the U.S. Government or any agency thereof. Additionally, this material is based upon work supported under a University Nuclear Leadership Program Graduate Fellowship through the Department of Energy, Office of Nuclear Energy. Further acknowledgements go to Sandeep Dhakal for providing the tensile measurement process parameters for Dr. Harold Ackler's Instron 5984, in the Materials Teaching Laboratory at Boise State University, and custom fixtures made by Philip Boysen. Publisher Copyright: {\textcopyright} 2024 The Authors",
year = "2024",
month = may,
doi = "10.1016/j.ijthermalsci.2024.108907",
language = "English",
volume = "199",
journal = "International Journal of Thermal Sciences",
issn = "1290-0729",
publisher = "Elsevier Masson s.r.l.",
}