NSUF - Nuclear Science User Facilities

Jonova Thomas

Profile Information
Name
Jonova Thomas
Institution
Purdue University
Position
Graduate Student
Affiliation
Purdue University
h-Index
ORCID
0000-0002-0111-6561
Publications:
"3-D reconstruction and microstructural characterization of neutron-irradiated U-10Zr fuel using FIB-SEM serial sectioning" Nicole Rodriguez Perez, Jonova Thomas, Daniel Murray, Maria Okuniewski, MRS Advances Vol. 8 2023 14-20 Link
Focused ion beam-scanning electron microscopy serial sectioning was applied to characterize the three-dimensional (3-D) porosity and phase regions of a neutron-irradiated U-10 wt% Zr fuel. The specimen was removed from an intermediate radial region of a fuel pin irradiated to 5.7 at.% burn-up. Backscattered electron imaging and energy-dispersive spectroscopy were performed on each serial section, allowing for the characterization of microstructural morphology and composition. Porosity size followed a lognormal distribution, ranging from 1.46 × 10–4 to 25.58 μm3 with a total porosity volume fraction of 13.02%. Distinctive microstructural regions were identified by composition and porosity: (1) a Zr-rich region with an average composition of 28.4 wt% Zr and a local porosity fraction of 6.88%, and (2) a U-rich region with an average composition of 97.0 wt% U and a local porosity fraction of 14.11%; subdivided into U-rich—high porosity (16.68%) and U-rich—low porosity (8.04%) regions. The detailed 3-D compositional and porosity regions can improve nuclear fuel performance codes.
"Microstructural analysis of a Zr rich specimen from the central radial region of a neutron irradiated U-10Zr fuel" Nicole Rodriguez Perez, Jonova Thomas, Maria Okuniewski, Transactions of the American Nuclear Society Vol. 128 2023 376-379 Link
Presentations:
"Assessment of irradiation damage and chemical interactions in neutron irradiated U-10Zr fuel and HT9 cladding with high-energy X-rays" Jonova Thomas, Sri Tapaswi Nori, Alejandro Figueroa, Ran Ren, Peter Kenesei, Jon D. Almer, Jason Harp, Maria Okuniewski, MRS Fall Meeting November 26-1, (2017)
"Assessment of Radiation Damage and Microstructural Changes in Neutron Irradiated U-10Zr Fuels with High Energy X-Rays" Jonova Thomas, Sri Tapaswi Nori, Alejandro Figueroa, Maria Okuniewski, Peter Kenesei, Jun-Sang Park, Jon Almer, Jason Harp, ANS Conference on Embedded Topical Nuclear Fuels & Structural Materials for Next Generation Nuclear Reactors June 17-21, (2018)
"Characterization of microstructural evolution in metallic fuels occurring over multiple length scales" Maria Okuniewski, Jonova Thomas, Sri Tapaswi Nori, Gyuchul Park, Walter Williams, NUMAT 2018 October 15-18, (2018)
"High-Resolution TEM Characterization of Neutron-Irradiated U-10Mo Fuel in the Low Temperature and Low Burnup Regime" Sukanya Majumder, Gyuchul Park, Tiankai Yao, Kaustubh Bawane, Cameron Howard, Kourtney Wright, Laura Hawkins, Brandon Miller, Jonova Thomas, Benjamin Beeler, Maria Okuniewski, Materials in Nuclear Energy Systems (MiNES) December 11-14, (2023)
"Localized Composition of Constituent Redistribution Regions in a Neutron Irradiated U-10wt.%Zr Fuel" Nicole Rodriguez Perez, Jonova Thomas, Maria Okuniewski, Materials in Nuclear Energy Systems (MiNES 2023) December 10-14, (2023)
"Microstructural analysis of a Zr rich specimen from the central radial region of a neutron irradiated U-10Zr fuel" Nicole Rodriguez Perez, Jonova Thomas, Maria Okuniewski, 2023 American Nuclear Society annual meeting (ANS 2023) June 11-14, (2023)
"Microstructural Characterization of Laser Deposited Titanium-Chromium Alloys" Jonova Thomas, Thomas W Scharf, Technical Research Symposium, SAMPE April 16-16, (2016)
"Microstructural characterization of radiation damage in neutron irradiated U-10wt%Zr fuels" Jonova Thomas, Sri Tapaswi Nori, Alejandro Figueroa, Maria Okuniewski, Peter Kenesei, Jun Sang Park, Jason Harp, NuMat: The Nuclear materials Conference October 14-18, (2018)
"Microstructural Phase Characterization of Irradiated and Control U-10Zr Fuels" Jonova Thomas, NSUF User meeting - ANS student conference April 4-6, (2019)
"Microstructural Phase Evolution in Laser Deposited Compositionally Graded Titanium-Chromium Alloys" Jonova Thomas, 7th North Texas Inter-University Material Science and Engineering Symposium, North Texas Chapter, ASM International April 27-27, (2016)
"Role of Composition on Microstructure of Additively Manufactured Functionally Graded Titanium-Chromium Alloys" Jonova Thomas, Deep Choudhuri, Jon-Erik Mogonye, Srinivas Mantri, Thomas W Scharf, Rajarshi Banerjee, Additive Manufacturing of Metals: Microstructure and Material Properties, Materials Science & Technology October 14-18, (2018)
NSUF Articles:
DOE Awards 33 Rapid Turnaround Experiment Research Proposals - Projects total approximately $1.2 million These projects will continue to advance the understanding of irradiation effects in nuclear fuels and materials in support of the mission of the DOE Office of Nuclear Energy. Monday, June 18, 2018 - Calls and Awards
DOE awards 39 RTE Projects - Projects total approximately $1.3 million Thursday, February 1, 2018 - Calls and Awards
NSUF Research Helps Support Student Researchers - Leading and assisting on NSUF projects, students can get hands on experience The opportunities for student-led research are nearly endless Friday, January 24, 2020 - Newsletter

About Us

The Nuclear Science User Facilities (NSUF) is the U.S. Department of Energy Office of Nuclear Energy's only designated nuclear energy user facility. Through peer-reviewed proposal processes, the NSUF provides researchers access to neutron, ion, and gamma irradiations, post-irradiation examination and beamline capabilities at Idaho National Laboratory and a diverse mix of university, national laboratory and industry partner institutions.

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