Zheng Lu is a PhD candidate in Engineering Physics at McMaster University. His research examines how pressure tube deformation affects coolant flow, fuel temperatures, and pressure tube wall temperatures in CANDU reactor channels. He combines computational fluid dynamics (CFD) simulations using STAR-CCM+ with Magnetic Resonance Velocimetry (MRV) experiments to study coolant bypass phenomena in aged CANDU fuel channels.

Before joining McMaster, Zheng completed his Master of Applied Science and Bachelor of Engineering degrees in Nuclear Engineering at Ontario Tech University. His earlier work focused on CFD modeling of CANDU fuel bundles.

Zheng has served as a teaching assistant for several undergraduate courses and as a reviewer for journals such as Nuclear Engineering and Technology and Nuclear Engineering and Design.

Morgan is currently an Engineering Physics PhD candidate, and has been with the group since 2021, starting as an M.Eng student. He holds a B.Eng (2021) and MASc (2023) in Nuclear Engineering from Ontario Tech University.

His research supports the Thermodynamics of Advanced Fuels - International Database (TAF-ID), an international collaboration developing a database used to perform thermodynamics calculations of nuclear fuel related materials. Experiments are focused on the characterization of representative corium (U-Pu), and the thermodynamics of both Plutonium, and Uranium-noble metal systems critical for severe accident analyses and fission fuels.

Previous work includes oxidation of metals (Cu-alloys and Zircaloy-4), molten salt thermodynamics, nuclear forensics, and materials characterization

Aaron is a part-time PhD student in Nuclear Engineering at Ontario Tech. His thesis focuses on creating a simulation tool for predicting radionuclide release during spent fuel conditioning, a waste management option to render spent fuel suitable for disposal in a Deep Geological Repository. The tool Radionuclide Release from Research Reactor Fuel Conditioning (4RFC) predicts the radionuclide inventory present in the fuel of interest, predicts the chemical form of the radionuclides under the prevailing conditioning parameters, predicts the transport of radionuclides under these conditions over time, and integrates these three prediction capabilities into a single tool, with a Graphical User Interface (GUI), to predict the radionuclide release during conditioning of research reactor fuel.

Aaron lives in Vienna, Austria and works at the International Atomic Energy Agency. He previously worked at Canadian Nuclear Laboratories in Chalk River. He has an undergraduate degree in Chemistry and a master’s degree in Nuclear, both from the Royal Military College of Canada. He is a licensed Professional Engineer in the province of Ontario. He enjoys the sport of curling and woodworking in his spare time.

Rong Guo studies neutron-induced damage in reactor materials, with a particular focus on high-temperature structural materials for Small Modular Reactors (SMRs). His work involves designing and implementing temperature controlled instrumentation for neutron irradiation experiments at the McMaster Nuclear Reactor. Rong also performs thermal hydraulic modeling to analyze the temperature profile of irradiation sites, supporting the optimization of experimental conditions and reactor safety.

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Luisa Vargas Suarez is a Master of Applied Science student in Engineering Physics at McMaster University, supervised by Dr. Markus Piro. Her research focuses on advancing computational modeling for Molten Salt Reactors (MSRs), specifically coupling Thermochimica with phase-field models in MOOSE to predict corrosion behavior and microstructural evolution in complex salt systems. She is currently collaborating with researchers at Idaho National Laboratory (INL), where she spent the summer working with the Computational Mechanics and Materials group on the Thermochimica–MOOSE integration for phase-field simulations.

Before joining McMaster, Luisa completed her B.Sc. in Energy Science at the University of Calgary, where she worked with Dr. Jason Donev on nuclear education and computational outreach projects. Her work included developing interactive simulations and web-based learning tools that have reached global audiences through the PhET Interactive Simulations project.

Hadleigh Bluhm is a a graduate student pursuing a Master of Applied Science in Engineering Physics at McMaster University. Her research focuses on investigating lead-free alternatives for radiation shielding in X-ray computed tomography. She aims to identify a suitable material to replace lead in X-ray shielding applications and experimentally characterize its properties. Her project is being done in collaboration with Zeiss.

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Prior to joining McMaster, Hadleigh completed her Bachelor of Science in astrophysics at the University of Calgary. Her undergraduate honours thesis research focused on characterizing the dark current in the CMOS detector being used in the CASTOR mission. Hadleigh's work was conducted in the University of Calgary's Vacuum Ultraviolet Laboratory.

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Hadleigh also spent a large portion of her undergraduate degree dedicated to scientific outreach at UofC's Rothney Astrophysical Observatory, where she interned, volunteered, and eventually coordinated volunteers for outreach events.

Patrick is currently a graduate student at McMaster University focusing on used research reactor fuel disposal. He graduated from University of Ontario Institute of Technology with a bachelors degree in Nuclear Engineering.

Lowell Bower is a part-time graduate student pursuing an MEng degree with graduate research project in Nuclear Engineering. His project is to create a computational fluid dynamics model of a molten salt reactor to examine behaviour of gaseous fission products within the core. Lowell’s full time work is as an Engineering Manager for Ontario Power Generation’s New Nuclear team.

Kaylee Rich is a fourth-year chemistry student completing an undergraduate thesis project in Markus’ research group. Her project focuses on the oxidation of Zircaloy-4 fuel sheath under steam and combined steam/air conditions. This research will provide valuable insight into the behaviour of Zircaloy-4 in CANDU reactors during loss-of-coolant accident conditions. While prior research has examined the oxidation of Zircaloy-4 under steam and air conditions independently, there remains a gap in the literature regarding combined steam/air environments.

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Kaylee has previously completed a co-op at Canadian Nuclear Laboratories as a materials science student. In this role, she developed an in-house method to qualify the density of TRISO fuel particles. TRISO is an advanced reactor fuel form used in high-temperature gas reactors. Maintaining rigorous qualification standards for nuclear fuel is essential to ensuring reactor safety. Kaylee also explored the use of spark plasma sintering as a method for compact fabrication, including determining the optimal fabrication parameters.

Evan Fletcher is an undergraduate student in his second year of Engineering at McMaster University, studying Materials Science and Engineering, and pursuing a minor in Nuclear Engineering. He is fascinated by the unique applications of nuclear science, especially its importance and application to the energy industry.

Evan is a recipient of the Engineering Research Experience Award, which lead him to join the Nuclear Fuels and Materials research group in May 2025 as a co-op student under Dr. Markus Piro. Evan is currently conducting research part-time alongside his undergraduate studies. During his time in the group he has contributed to several projects on the development of Nuclear Materials. Evan has operated a Netzsch STA-449 F1 Jupiter for Thermogravimetric Analysis (TGA) measurements of CuCrZr alloys for fusion applications as well as Zry-4 CANDU fuel tubes under accident conditions. He has also completed Differential Scanning Calorimetry (DSC) measurements of surrogate Corium for the OECD-NEA TCOFF project. More recently, Evan has been focusing on X-Ray Computed Tomography (XCT) scanning of both surrogate and fresh McMaster Nuclear Reactor fuel assemblies.​

When Evan is not studying or doing research, he likes to keep busy with sports. Evan spends his free time running, playing basketball, and tossing a frisbee around!

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