Photo of Robert Zboray

Robert Zboray

Associate Professor

Affiliation(s):

  • Mechanical and Nuclear Engineering
  • Nuclear Engineering

233 Reber Building

rzz65@psu.edu

814-863-1323

Research Areas:

Nuclear Power, Nuclear Science, Thermal/Fluid Sciences

Interest Areas:

Radiation-based imaging methods, Gammas, X-ray and neutron tomography, Imaging detector technology, experimental nuclear thermal-hydraulics, single- and multi-phase flow measurement technology.

 
 

 

Education

  • MS, Nuclear Engineering, Technical University of Budapest, 1997
  • Ph D, Nuclear Engineering, Delft University of Technology, 2002

Publications

Journal Articles

  • Robert Zboray and Pavel Trtik, 2018, "800 fps neutron radiography of air-water two-phase flow", MethodsX, 5, pp. 96 - 102
  • Marianna Papadionysiou, Gregory Perret, Robert Zboray, Robert Adams and Jean-Baptiste Mosset, 2018, "Monte Carlo simulation of a scintillation detector for spent fuel characterization in a hot cell", Nuclear Engineering and Design, 332, pp. 119 - 126
  • Robert Adams and Robert Zboray, 2017, "Gamma radiography and tomography with a CCD camera and Co-60 source", Applied Radiation and Isotopes, 127, pp. 82-86
  • Robert Zboray, Christian Bolesch and Horst-Michael Prasser, 2017, "Development of neutron and X-ray imaging techniques for nuclear fuel bundle optimization", Nuclear Engineering and Design
  • Robert Zboray, R. Adams and Z. Kis, 2017, "Fast neutron radiography and tomography at a 10 MW research reactor beamline", Applied Radiation and Isotopes, 119, pp. 43-50
  • Horst-Michael Prasser, Christian Bolesch, Kerstin Cramer, Daisuke Ito, Petros Papadopoulos, Abhishek Saxena and Robert Zboray, 2016, "Bubbly, Slug, and Annular Two-Phase Flow in Tight-Lattice Subchannels", Nuclear Engineering and Technology, 48, (4), pp. 847-858
  • Julien Dupont, Guillaume Mignot, Robert Zboray and Horst-Michael Prasser, 2016, "Infrared film thickness measurement: comparison with cold neutron imaging", Journal of Nuclear Science and Technology, 53, (5), pp. 673-681
  • Abhishek Saxena, Robert Zboray and Horst-Michael Prasser, 2016, "Simulations and measurements of adiabatic annular flows in triangular, tight lattice nuclear fuel bundle model", Nuclear Engineering and Design, 299, pp. 163-173
  • Robert Adams, Robert Zboray and Horst-Michael Prasser, 2016, "A novel fast-neutron tomography system based on a plastic scintillator array and a compact D–D neutron generator", Applied Radiation and Isotopes, 107, pp. 1-7
  • Robert Zboray, Guillaume Mignot, Ralf Kapulla and Domenico Paladino, 2015, "Erosion and break-up of light-gas layers by a horizontal jet in a multi-vessel, large-scale containment test system", Nuclear Engineering and Design, 291, pp. 10-18
  • Robert Zboray, Volker Dangendorf, Ilan Mor, Benjamin Bromberger and Kai Tittelmeier, 2015, "Time-resolved fast-neutron radiography of air-water two-phase flows in a rectangular channel by an improved detection system", Review of Scientific Instruments, 86, (7), pp. 075103
  • Volker Dangendorf and Robert Zboray, 2015, "Potential and status in imaging with fast neutrons", Neutron News, 26, (2), pp. 27-30
  • Robert Adams, Lorenz Bort, Robert Zboray and Horst-Michael Prasser, 2015, "Development and characterization of a D–D fast neutron generator for imaging applications", Applied Radiation and Isotopes, 96, pp. 114-121
  • Robert Zboray, Volker Dangendorf, Ilan Mor, Kai Tittelmeier, Benjamin Bromberger and Horst-Michael Prasser, 2015, "Time-resolved Fast Neutron Radiography of Air-water Two-phase Flows", Physics Procedia, 69, pp. 551-555
  • Robert Zboray, I. Mor, V. Dangendorf, M. Stark, K. Tittelmeier, M. Cortesi and R. Adams, 2014, "High-frame rate imaging of two-phase flow in a thin rectangular channel using fast neutrons", Applied Radiation and Isotopes, 90, pp. 122-131
  • M. Cortesi, V. Dangendorf, Robert Zboray and H.-M. Prasser, 2014, "A novel fast-neutron detector concept for energy-selective imaging and imaging spectroscopy", Review of Scientific Instruments, 85, (7), pp. 073305
  • Robert Zboray, Robert Adams, Marco Cortesi and Horst-Michael Prasser, 2014, "Development of a fast neutron imaging system for investigating two-phase flows in nuclear thermal–hydraulic phenomena: A status report", Nuclear Engineering and Design, 273, pp. 10-23
  • Robert Adams, Robert Zboray, Marco Cortesi and Horst-Michael Prasser, 2014, "Conceptual design and optimization of a plastic scintillator array for 2D tomography using a compact D–D fast neutron generator", Applied Radiation and Isotopes, 86, pp. 63-70
  • Robert Zboray and H.-M. Prasser, 2013, "Measuring liquid film thickness in annular two-phase flows by cold neutron imaging", Experiments in Fluids, 54, (9)
  • Robert Zboray and Horst-Michael Prasser, 2013, "Neutron imaging of annular flows in a tight lattice fuel bundle model", Nuclear Engineering and Design, 262, pp. 589-599
  • Robert Zboray and Horst-Michael Prasser, 2013, "Optimizing the performance of cold-neutron tomography for investigating annular flows and functional spacers in fuel rod bundles", Nuclear Engineering and Design, 260, pp. 188-203
  • M. Cortesi, Robert Zboray, A. Kaestner and H.-M. Prasser, 2013, "Development of a cold-neutron imaging detector based on thick gaseous electron multiplier", Review of Scientific Instruments, 84, (2), pp. 023305
  • Domenico Paladino, Michele Andreani, Robert Zboray and Jörg Dreier, 2012, "Toward a CFD-grade database addressing LWR containment phenomena", Nuclear Engineering and Design, 253, pp. 331-342
  • Michele Andreani, Ralf Kapulla and Robert Zboray, 2012, "Gas stratification break-up by a vertical jet: Simulations using the GOTHIC code", Nuclear Engineering and Design, 249, pp. 71-81
  • Michele Andreani, Ralf Kapulla and Robert Zboray, 2012, "Gas stratification break-up by a vertical jet: Simulations using the GOTHIC code", Nuclear Engineering and Design, 249, pp. 71 - 81
  • J.L. Kickhofel, Robert Zboray, M. Damsohn, A. Kaestner, E.H. Lehmann and H.-M. Prasser, 2011, "Cold neutron tomography of annular coolant flow in a double subchannel model of a boiling water reactor", Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 651, (1), pp. 297-304
  • Nejdet Erkan, Ralf Kapulla, Guillaume Mignot, Robert Zboray and Domenico Paladino, 2011, "Experimental investigation of spray induced gas stratification break-up and mixing in two interconnected vessels", Nuclear Engineering and Design, 241, (9), pp. 3935-3944
  • Robert Zboray and Horst-Michael Prasser, 2011, "On the relevance of low side flows for thermal loads in T-junctions", Nuclear Engineering and Design, 241, (8), pp. 2881-2888
  • Robert Zboray, John Kickhofel, Manuel Damsohn and Horst-Michael Prasser, 2011, "Cold-neutron tomography of annular flow and functional spacer performance in a model of a boiling water reactor fuel rod bundle", Nuclear Engineering and Design, 241, (8), pp. 3201-3215
  • Robert Zboray and Domenico Paladino, 2010, "Experiments on basic thermalhydraulic phenomena relevant for LWR containments: Gas mixing and transport induced by buoyant jets in a multi-compartment geometry", Nuclear Engineering and Design, 240, (10), pp. 3158-3169
  • Domenico Paladino, Robert Zboray, Michele Andreani and Jörg Dreier, 2010, "Flow transport and mixing induced by horizontal jets impinging on a vertical wall of the multi-compartment PANDA facility", Nuclear Engineering and Design, 240, (8), pp. 2054-2065
  • Domenico Paladino, Robert Zboray and Olivier Auban, 2010, "The panda tests 9 and 9bis investigating gas mixing and stratification triggered by low momentum plumes", Nuclear Engineering and Design, 240, (5), pp. 1262-1270
  • Domenico Paladino, Robert Zboray, Pascal Benz and Michele Andreani, 2010, "Three-gas mixture plume inducing mixing and stratification in a multi-compartment containment", Nuclear Engineering and Design, 240, (2), pp. 210-220
  • C. Walker, M. Simiano, Robert Zboray and H.-M. Prasser, 2009, "Investigations on mixing phenomena in single-phase flow in a T-junction geometry", Nuclear Engineering and Design, 239, (1), pp. 116-126
  • G. Yadigaroglu, M. Simiano, R. Milenkovic, J. Kubasch, M. Milelli, Robert Zboray, F. De Cachard, B. Smith, D. Lakehal and B. Sigg, 2008, "CFD4NRS with a focus on experimental and CMFD investigations of bubbly flows", Nuclear Engineering and Design, 238, (3), pp. 771-785
  • O. Auban, Robert Zboray and D. Paladino, 2007, "Investigation of large-scale gas mixing and stratification phenomena related to LWR containment studies in the PANDA facility", Nuclear Engineering and Design, 237, (4), pp. 409-419
  • M. Simiano, Robert Zboray, F. de Cachard, D. Lakehal and G. Yadigaroglu, 2006, "Comprehensive experimental investigation of the hydrodynamics of large-scale, 3D, oscillating bubble plumes", International Journal of Multiphase Flow, 32, (10-11), pp. 1160-1181
  • Robert Zboray and F. de Cachard, 2005, "Simulating large-scale bubble plumes using various closure and two-phase turbulence models", Nuclear Engineering and Design, 235, (8), pp. 867-884
  • Olivier Auban, Domenico Paladino and Robert Zboray, 2004, "Experimental Investigation of Natural-Circulation Flow Behavior under Low-Power/Low-Pressure Conditions in the Large-Scale PANDA Facility", Nuclear Technology, 148, (3), pp. 294-312
  • Robert Zboray, Wilhelmus J. de Kruijf and Tim H. van der Hagen, 2004, "Investigating the Nonlinear Dynamics of Natural-Circulation, Boiling Two-Phase Flows", Nuclear Technology, 146, (3), pp. 244-256
  • Robert Zboray, W.J.M. de Kruijf and T.H.J.J. van der Hagen, 2003, "Stabilising boiling water reactors by optimising the position of the feedwater sparger", Nuclear Engineering and Design, 222, (1), pp. 54-67
  • A. Manera, Robert Zboray and T.H.J.J. van der Hagen, 2003, "Assessment of linear and non-linear autoregressive methods for BWR stability monitoring", Progress in Nuclear Energy, 43, (1-4), pp. 321-327
  • Robert Zboray, Wilhelmus J. M. de Kruijf, Tim H. J. J. van der Hagen and Hugo van Dam, 2001, "Investigating the Stability Characteristics of Natural-Circulation Boiling Water Reactors Using Root Loci of a Reduced-Order Model", Nuclear Technology, 136, (3), pp. 301-314
  • T.H.J.J. van der Hagen, Robert Zboray and W.J.M. de Kruijf, 2000, "Questioning the use of the decay ratio in BWR stability monitoring", Annals of Nuclear Energy, 27, (8), pp. 727 - 732
  • M Cortesi, Robert Zboray, R Adams, V Dangendorf, M Meshkian and H -M Prasser, , "Development of large-area THGEM detectors for investigation of thermal-hydraulic phenomena using neutron imaging", Journal of Instrumentation, 8, (10), pp. C10009-C10009
  • M Cortesi, Robert Zboray, R Adams, V Dangendorf, A Breskin, S Mayer, H Hoedlmoser and H -M Prasser, , "First studies of electron transport along small gas gaps of novel foil radiation converters for fast-neutron detectors", Journal of Instrumentation, 8, (01), pp. P01016-P01016

Conference Proceedings

  • Sidharth Paranjape, Ralf Kapulla, Guillaume Mignot, Domenico Paladino and Robert Zboray, 2013, "Light water reactor hollow cone containment spray performance tests in the presence of light non-condensable gas"
  • M Andreani and Robert Zboray, 2013, "Simulation of the Interaction of a Horizontal Jet with a Stratified and Condensing Ambient in a Large-Scale, Multi-Compartment Geometry", 508, pp. 12--17
  • Robert Zboray, Matthew Stark and Horst-Michael Prasser, 2013, "Examining annular flows in a tight-lattice fuel bundle model by cold-neutron Imaging", pp. 133
  • Guillaume Mignot, Ralf Kapulla, Domenico Paladino and Robert Zboray, 2012, "Experiment on large scale plume interaction with a stratified gas environment resembling the thermal activity of a autocatalytic recombiner", 12, pp. 24--28
  • G Mignot, R Kapulla, N Erkan, Robert Zboray and D Paladino, 2011, "Containment cooler performance in the presence of light non condensable gas with cooler location as a primary parameter"
  • D Paladino, G Mignot, N Erkan, Robert Zboray, R Kapulla and M Andreani, 2011, "Sudden discharge of gas mixture in a confined multi-compartment"
  • Robert Zboray, Marc Guetg, John Kickhofel, Frank Barthel, Uwe Sprewitz, Uwe Hampel and H-M Prasser, 2011, "Investigating annular flows and the effect of functional spacers in an adiabatic double-subchannel model of a BWR fuel bundle by ultra-fast X-ray tomography"
  • Ralf Kapulla, Domenico Paladino, Guillaume Mignot, Robert Zboray and Sanjeev Gupta, 2009, "Break-Up of Gas Stratification in LWR Containment Induced by Negatively Buoyant Jets and Plumes", ASME
  • B. Niceno, Robert Zboray and H.-M. Prasser, 2009, "Experimental and Numerical Mixing Studies Relevant for Prediction of Thermal Loads in T-junctions", Begellhouse
  • Nejdet Erkan, Guillaume Mignot, Domenico Paladino and Robert Zboray, 2009, "Spray tests in PANDA to study accident mitigation in PWR containments", pp. 14--17
  • Robert Zboray, A Manera, B Niceno and H-M Prasser, 2009, "Investigations on mixing phenomena in single-phase flows in a T-junction geometry", pp. 830--849
  • Guillaume Mignot, Ralf Kapulla, Robert Zboray, Nejdet Erkan and Domenico Paladino, 2009, "Parametric study of containment gas stratification break-up by vertical fluid release"
  • Robert Zboray, Domenico Paladino, G Mignot, R Kapulla, Nejdet Erkan, Michele Andreani and Martin Ritterath, 2009, "Mixing of density stratified containment atmosphere by horizontal jet release", Nuclear Energy for New Europe, pp. 14--17
  • HM Prasser, Christopher Walker, A Manera, B Niceno, M Simiano and Robert Zboray, 2008, "Fluid mixing at a T-junction"
  • Domenico Paladino, Robert Zboray and Pascal Benz, 2007, "Horizontal jets impinging on the vertical wall of a containment compartment"
  • Robert Zboray, Domenico Paladino and Olivier Auban, 2006, "Experiments on gas mixing and stratification driven by jets and plumes in large-scale, multi-compartment geometries", pp. 309--315
  • Domenico Paladino, Olivier Auban and Robert Zboray, 2006, "Large scale gas mixing and stratification triggered by a buoyant plume with and without occurrence of condensation", American Nuclear Society, 555 North Kensington Avenue, La Grange Park, IL 60526 (United States)
  • M Andreani, F de Cachard, K Haller, M Simiano, BL Smith and Robert Zboray, 2005, "Basic validation of CFD codes for containment thermal-hydraulics", pp. 10--12
  • M Simiano, 2004, "Extensive measurements of the hydrodynamic characteristic of large scale bubble plumes"
  • Robert Zboray, M Simiano and F De Cachard, 2004, "Local two-phase flow measurements with advanced data processing methods in bubbly plumes", pp. 22--25
  • Robert Zboray, WJM De Kruijf and THJJ Van der Hagen, 2001, "Experiments on the relation between the transit time and the oscillation period of density-waves"
  • WJM de Kruijf, Robert Zboray, A Manera, THJJ van der Hagen, H van Dam and RF Mudde, 2000, "Non-Linear Characteristics of Thermohydraulic Instabilities in Innovative BWRs"
  • Robert Zboray, WJM de Kruijf, H van Dam and THJJ van der Hagen, 2000, "Numerical investigations on the relation between the decay ratio and operational margins for monitoring BWR stability"
  • WJM De Kruijf, Robert Zboray and THJJ van der Hagen, 2000, "Including the travelling of density waves in the analytical modeling of boiling channel stability", pp. 76--88
  • Robert Zboray, WJM de Kruijf, THJJ van der Hagen and H van Dam, 2000, "On the Qualification of Boiling Water Reactor Stability Margin Indicators using Linear Stability Analysis", pp. 7--11
  • THJJ van der Hagen, DDB van Bragt, Robert Zboray and WJM de Kruijf, 1999, "The Importance of Non-Linear Effects in Estimating BWR Stability Margins", pp. 83--86
  • Robert Zboray, DDB VAN BRAGT, RIZWAN-UDDIN, THJJ VAN DER HAGEN and H VAN DAM, 1999, "Influence of Asymmetrical Axial Power Distributions on Nonlinear BWR Dynamics", pp. 3--8
  • Robert Zboray, A Manera, WJM De Kruijf, THJJ Van der Hagen, DDB Van Bragt and H Van Dam, 1999, "Experiments on nonlinear density-wave oscillations in the DESIRE facility"
  • Robert Zboray, Christian Bolesch and Horst-Michael Prasser, , "Neutron and X-ray imaging techniques for nuclear fuel rod bundle optimization and development", Livorno, Italy
  • Robert Zboray, Marco Cortesi, Volker Dangendorf and Horst-Michael Prasser, , "Development of Fast-Neutron THGEM-based Imaging Detectors for Investigation of Thermal-Hydraulic Phenomena"
  • Domenico Paladino, Olivier Auban and Robert Zboray, , "Large-scale, multi-compartment tests in PANDA for LWR-containment analysis and code validation"

Technical Reports

  • Robert Zboray, Wilhelmus J. M. de Kruijf, Tim H.J.J. van der Hagen and Rizwan-uddin, , "Experimental and Theoretical Analysis of Flashing Instability for Next Generation Natural Circulation Reactors"

Research Projects

Honors and Awards

Service

Service to Penn State:

  • Committee Work, Member, RSEC, Penn State Reactor Safeguards Committee, January 2018 - January 2021
  • Committee Work, Member, GraduatePrograms/NucE Candidacy Exam Committee, December 2017
  • Committee Work, Member, Undergraduate Programs/Improvement in the NucE Curriculum and Lab, December 2017

Service to External Organizations:

  • Service to Public and Private Organizations, Committee Member, Science Review Committee, Neutron Sciences ORNL, March 2018
  • Administrative Support Work, Liaison, Liaison, ANS Standards Committee, February 2018
 


 

About

The Department of Mechanical and Nuclear Engineering at Penn State is one of the nation’s largest and most successful engineering departments. We serve more than 1,000 undergraduate students and more than 330 graduate students

We offer B.S. degrees in mechanical engineering and nuclear engineering as well as resident (M.S., Ph.D.) and online (M.S., M.Eng.) graduate degrees in nuclear engineering and mechanical engineering. MNE's strength is in offering hands-on experience in highly relevant research areas, such as energy, homeland security, biomedical devices, and transportation systems.

Department of Mechanical and Nuclear Engineering

137 Reber Building

The Pennsylvania State University

University Park, PA 16802-4400

Phone: 814-865-2519