alexa Characterization Of Graphite Components Of FHR Design
ISSN: 2169-0022

Journal of Material Sciences & Engineering
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Joint Conference: International Conference on DIAMOND AND CARBON MATERIALS & GRAPHENE AND SEMICONDUCTORS
July 17-18, 2017 Chicago, USA

Ruchi Gakhar, Huali Wu, Allen Chen and Raluca Scarlat
University of Wisconsin, USA
ScientificTracks Abstracts: J Material Sci Eng
DOI: 10.4172/2169-0022-C1-076
Abstract
Two types of graphite used in the core design of Fluoride Salt Cooled High Temperature Reactor (FHR) are Graphite Matrix A3 and Nuclear Grade IG110. Matrix A3 forms the structural component for the fuel kernels, while IG110 forms the reflector blocks and some of the internal core components. Graphite forms an integral component of this design because it contributes to the structural integrity of the reactor as well as the pores of the graphite are considered as the main trapping site for the tritium produced in the coolant salt. Matrix A3 graphite which forms fuel pebble contains fission product that are produced during nuclear operation. In addition, the salt coolant or the corrosion products might intrude through the surface into the pores of the graphite. Considering these attributes, the microstructure characterization of two grades of graphite is important in developing knowledge of characteristics of graphite under FHR operating conditions. The microstructural differences between A-3 and IG-110 are attributed to the differences in the raw materials and the heat treatment temperature during manufacturing. The present study focuses on the microstructure examination of two types of graphite components using X-ray Diffraction, Raman Spectroscopy, BET analysis, Mercury porosimetry and Scanning Electron Microscopy techniques. The lattice parameters, crystallite size (parallel and perpendicular to the basal plane), anisotropy and degree of graphitization estimated based on X-ray diffraction patterns and Raman spectra for both IG-110 and Matrix A3 graphite will be discussed. The similarities and differences in microstructural characteristics between the two grades of graphite as obtained using the XRD and Raman spectroscopy results will be presented and the factors causing such differences will be discussed.
Biography

Ruchi Gakhar is a Post-doctoral Research Associate at UW Madison in the Department of Nuclear Engineering and Engineering Physics. She received her PhD in Materials Science from University of Nevada, Reno in December 2015. She also holds an undergraduate and Master's degree in Chemistry and an additional Master's in Nanotechnology. During her PhD, she worked on designing of new, affordable materials to harness solar energy for clean energy production. She has published 15 journal articles and a book chapter so far. She has received several awards for academic excellence, including 2016 Nevada Regents' Scholar Award. At UW Madison, she is involved in investigating materials aspects of advanced nuclear reactor design–fluoride salt cooled high temperature reactor (FHR)

Email: [email protected]

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