Ayman Hawari

Distinguished University Professor of Nuclear Engineering, Director of Nuclear Reactor Program

Director of Nuclear Reactor Program
  • 919-515-4598
  • Burlington Laboratory 2116

Dr. Hawari is interested in performing experimental and computational investigation (simulations) to understand the fundamentals of the interaction of radiation with matter and the resulting ramifications that impact the engineering of nuclear systems.  Currently, his research group conducts measurements and simulations (using ab initio and molecular dynamics methods) to investigate the scattering of thermal neutrons in matter and to generate thermal neutron scattering cross section data. In addition, they apply atomistic modeling techniques and develop experiments to study the behavior of accident tolerant fuel in the extreme radiation and temperature environments of a nuclear reactor.  Hawari’s group is also engaged in the validation and benchmark of modern nuclear reactor simulation tools in support of transient testing of nuclear fuel. All of these thrust areas directly support the development of Advanced Nuclear Reactors including Small Modular Reactor concepts.

Dr. Hawari’s work also focuses on developing and utilizing radiation beams as probes of matter at the nano-scale. This includes the utilization of thermal neutron beams in imaging and scattering applications, and the use of slow positron beams to assay nano-porosity in matter. These types of beams can be generated using a nuclear reactor such as the PULSTAR research reactor on the NCSU campus. Therefore, he is interested in the development of experimental facilities for nondestructive examination at research reactors. Information about the PULSTAR reactor and facilities developed by Hawari’s group can be found at https://www.ne.ncsu.edu/nrp/

Education

Ph.D. 1995

Nuclear Engineering

University of Michigan-Ann Arbor

M.S.E. 1990

Nuclear Engineering

University of Michigan-Ann Arbor

B.S.E. 1987

Nuclear Engineering

University of Missouri-Rolla

Research Description

Dr. Hawari's work covers various areas that are important for the design of Advanced Nuclear Reactors, including thermal neutron scattering cross sections data generation, computational and experimental investigation of accident tolerant fuel, and the development of modern computational methods to support analysis of transient fuel testing experiments.

Publications

ENDF/B-VIII.0: The 8th major release of the nuclear reaction data library with CIELO-project cross Sections, new standards and thermal scattering data
Brown, D. A., Chadwick, M. B., Capote, R., Kahler, A. C., Trkov, A., Herman, M. W., … Brown, F. (2018), Nuclear Data Sheets, 148, 1–142.
Swelling and free-volume characteristics of TEMPO-oxidized cellulose nanofibril films
Torstensen, J. O., Liu, M., Jin, S. A., Deng, L. Y., Hawari, A. I., Syverud, K., … Gregersen, O. W. (2018), Biomacromolecules, 19(3), 1016–1025.
Geant4 analysis of a thermal neutron real-time imaging system
Datta, A., & Hawari, A. I. (2017), IEEE Transactions on Nuclear Science, 64(7), 1652–1658.
Investigation of FPGA-based real-time adaptive digital pulse shaping for high-count-rate applications
Saxena, S., & Hawari, A. I. (2017), IEEE Transactions on Nuclear Science, 64(7), 1733–1738.
Thermal neutron scattering law calculations using ab initio molecular dynamics
Wormald, J., & Hawari, A. I. (2017), In Nd 2016: international conference on nuclear data for science and technology (Vol. 146).
Neutron-antineutron oscillations: Theoretical status and experimental prospects
Phillips, D. G., Snow, W. M., Babul, K., Banerjee, S., Baxter, D. V., Berezhiani, Z., … Dolgov, A. (2016), Physics Reports, 612, 1–45.
A Phonon-based covariance methodology for ENDF S(alpha, beta) and thermal neutron inelastic scattering cross sections
Holmes, J. C., Hawari, A. I., & Zerkle, M. L. (2016), Nuclear Science and Engineering, 184(1), 84–113.
Examination of the impact of electron-phonon coupling on fission enhanced diffusion in uranium dioxide using classical molecular dynamics
Wormald, J. L., & Hawari, A. I. (2015), Journal of Materials Research, 30(9), 1485–1494.
Exploring fission enhanced diffusion of uranium in uranium dioxide using classical molecular dynamics simulations
Wormald, J. L., & Hawari, A. I. (2014), (pp. 155–162).
Generation of an S(alpha, beta) covariance matrix by Monte Carlo sampling of the phonon frequency spectrum
Holmes, J. C., & Hawari, A. I. (2014), Nuclear Data Sheets, 118, 392–395.
Inelastic thermal neutron scattering cross sections for reactor-grade graphite
Hawari, A. I., & Gillete, V. H. (2014), Nuclear Data Sheets, 118, 176–178.
Modern techniques for inelastic thermal neutron scattering analysis
Hawari, A. I. (2014), Nuclear Data Sheets, 118, 172–175.
Ultracold neutron source at the PULSTAR reactor: Engineering design and cryogenic testing
Korobkina, E., Medlin, G., Wehring, B., Hawari, A. I., Huffman, P. R., Young, A. R., … Palmquist, G. (2014), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 767, 169–175.
The intense slow positron beam facility at The PULSTAR reactor and applications in nano-materials study
Liu, M., Moxom, J., Hawari, A. I., & Gidley, D. W. (2013), In Application of accelerators in research and industry (Vol. 1525, pp. 455–459).
Coded source neutron imaging at the PULSTAR reactor
Xiao, Z. Y., Mishra, K. K., Hawari, A. I., Bingham, P. R., Bilheux, H. Z., & Tobin, K. W. (2011), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 652(1), 606–609.
Operation and testing of the PULSTAR reactor intense slow positron beam and PALS spectrometers
Hawari, A. I., Gidley, D. W., Moxom, J., Hathaway, A. G., & Mukherjee, S. (2011), In 12th international workshop on slow positron beam tecniques (slopos12) (Vol. 262).
Phase contrast neutron imaging at the PULSTAR reactor
Mishra, K. K., & Hawari, A. I. (2011), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 652(1), 615–619.
Reanalysis of recent neutron diffusion and transmission measurements in nuclear graphite
Gould, C. R., Hawari, A. I., & Sharapov, E. I. (2010), Nuclear Science and Engineering, 165(2), 200–209.
Examination of reactor grade graphite using neutron powder diffraction
Dijulio, D. D., & Hawari, A. I. (2009), (Vol. 392, pp. 225–229).
First measurement of the neutron beta asymmetry with ultracold neutrons
Pattie, R. W., Anaya, J., Back, H. O., Boissevain, J. G., Bowles, T. J., Broussard, L. J., … Hoedl, S. A. (2009), Physical Review Letters, 102(1).
Investigating phase contrast neutron imaging for mixed phase-amplitude objects
Mishra, K. K., & Hawari, A. I. (2009), IEEE Transactions on Nuclear Science, 56(3), 1629–1636. https://doi.org/10.1109/TNS.2009.2016962
Development of neutron phase contrast Imaging at the NC State University PULSTAR Reactor
Mishra, K. K., & Hawari, A. I. (2008), (pp. 123–133).
Analysis of the impact of random summing on passive assay of pebble bed reactor fuel using gamma-ray spectrometry
Chen, J., & Hawari, A. I. (2007), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 579(1), 297–300. https://doi.org/10.1016/j.nima.2007.04.064
Implementation of a prototype slow positron beam at the NC State University PULSTAR reactor
Hathaway, A. G., Skalsey, M., Frieze, W. E., Vallery, R. S., Gidley, D. W., Hawari, A. I., & Xu, J. (2007), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 579(1), 538–541. https://doi.org/10.1016/j.nima.2007.03.036
Investigation of the impact of simple carbon interstitial formations on thermal neutron scattering in graphite
Hawari, A. I., Al-Qasir, I. I., & Ougouag, A. M. (2007), Nuclear Science and Engineering, 155(3), 449–462. https://doi.org/10.13182/NSE07-A2676
Molecular dynamics simulations of graphite at high temperatures
Hehr, B. D., Hawari, A. I., & Gillette, V. H. (2007), Nuclear Technology, 160(2), 251–256. https://doi.org/10.13182/NT07-A3897
Performance analysis of the intense slow-positron beam at the NC State University PULSTAR reactor
Moxom, J., Hathaway, A. G., Bodnaruk, E. W., Hawari, A. I., & Xu, J. (2007), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 579(1), 534–537. https://doi.org/10.1016/j.nima.2007.04.117
Simulation of gamma-ray spectrometry of failed TRISO fuel
Harp, J. M., Hawari, A. I., & Bourham, M. A. (2007), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 579(1), 301–304. https://doi.org/10.1016/j.nima.2007.04.065
A Gd-based gaseous electron multiplier detector for neutron scattering applications
DiJulio, D. D., Hawari, A. I., & Berliner, R. (2007), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 579(1), 71–74. https://doi.org/10.1016/j.nima.2007.04.015
An ultracold neutron source at the NC state university PULSTAR reactor
Korobkna, E., Wehring, B. W., Hawari, A. I., Young, A. R., Huffman, P. R., Golub, R., … Palmquist, G. (2007), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 579(1), 530–533. https://doi.org/10.1016/j.nima.2007.04.116
Assessment of on-line burnup monitoring of pebble bed reactor fuel by passive neutron counting
Su, B. J., Zhao, Z. X., Chen, J. W., & Hawari, A. I. (2006), Progress in Nuclear Energy, 48(7), 686–702. https://doi.org/10.1016/j.pnucene.2006.06.013
Design and performance of a thermal neutron imaging facility at the North Carolina State University PULSTAR reactor
Mishra, K. K., Hawari, A. I., & Gillette, V. H. (2006), IEEE Transactions on Nuclear Science, 53(6), 3904–3911.
Computational investigation of on-line interrogation of pebble bed reactor fuel
Hawari, A. I., & Chen, J. W. (2005), IEEE Transactions on Nuclear Science, 52(5), 1659–1664. https://doi.org/10.1109/TNS.2005.856760
Efficiency self-calibration of the HPGe detector for on-line assay of pebble bed reactor fuel
Hawari, A. I., Chen, J., & Su, B. (2005), Journal of Radioanalytical and Nuclear Chemistry, 264(1), 265–270. https://doi.org/10.1007/s10967-005-0704-y
Gamma-ray spectrometry analysis of pebble bed reactor fuel using Monte Carlo simulations
Chen, J. W., Hawari, A. I., Zhao, Z. X., & Su, B. J. (2003), Nuclear Instruments & Methods in Physics Research. Section A, Accelerators, Spectrometers, Detectors, and Associated Equipment, 505(1-2), 393–396. https://doi.org/10.1016/S0168-9002(03)01105-7
Assessment of on-line burnup monitoring of pebble bed reactor fuel using passive gamma-ray spectrometry
Hawari, A. I., Chen, J. W., Su, B. J., & Zhao, Z. X. (2002), IEEE Transactions on Nuclear Science, 49(3), 1249–1253. https://doi.org/10.1109/TNS.2002.1039646

View all publications via NC State Libraries

Grants

Evaluation of the Thermal Scattering Law for Advanced Reactor Neutron Moderators and Reflectors
US Dept. of Energy (DOE)(10/01/18 - 9/30/21)
Establishing a Hot Cell Capability at the PULSTAR Reactor
US Dept. of Energy (DOE)(10/01/18 - 9/30/19)
BWXT Tollgate 5 Irradiation Services RFQ
BWXT Isotope Technology Group, Inc. (11/01/17 - 1/31/18)
Development of Information Trustworthiness and Integrity Algorithms for Cybersecurity Defenses of Nuclear Power Reactors Technical Workscope Identification: NE-1
US Dept. of Energy (DOE)(10/01/17 - 9/30/20)
A Comprehensive Upgrade of the PULSTAR Reactor Control Console
US Dept. of Energy (DOE)(8/01/16 - 7/31/18)
Generation of the Thermal Neutron Scattering Law
US Dept. of Energy (DOE)(3/17/16 - 9/30/19)
Development of State-of-the-Art capabilities to support treat modelling and simulation at North Carolina State University
US Dept. of Energy (DOE)(11/09/15 - 9/30/17)
Elemental analysis by neutron activation analysis of Arsenic and Selenium for environmental and biological samples
US Environmental Protection Agency (EPA)(8/06/14 - 8/05/17)
Benchmark Evaluation of TREAT Reactor M2 and M3 Transient Experiments
US Dept. of Energy (DOE)(10/01/15 - 9/30/18)
Methodology Development for Cybersecurity Robustness and Vulnerability Assessment of University Research Reactors: A Case Study Using the PULSATR Reactor
US Dept. of Energy (DOE)(10/01/15 - 9/30/18)