Dheeraj Singh, Ph.D.(Electrical)’s Post

🔍Neutron spectroscopy can be used to distinguish neutron sources and special nuclear material (highly-enriched uranium and plutonium). 📊The figure shows the neutron energy spectra from plutonium metal (fission), mixed oxide fuel (fission and alpha, n) and AmBe (alpha, n). 🎯 Fast neutron detectors, such as organic scintillators, are capable of coarse neutron spectroscopy and can measure these energy spectra. 💼 Results can be used to differentiate these neutron sources, hence aiding our nonproliferation goals! #engineering #science #research #security #graduateschool #graduatestudent  #mtvconsortium #phd #phdstudent Nuclear Engineering and Radiological Sciences—University of Michigan University of Michigan College of Engineering

🔬 Excited to share the extended version of the model I've been refining throughout my PhD journey! 🎓 Our research on irradiation hardening, focusing on the utilization of Indentation Size Effect and Plasticity Fundamentals, has taken a significant leap forward. 🚀 Collaborating with Paul Scherrer Institut (PSI), Nuclear Energy and Safety Research Department (NES), we've delved deeper into understanding the irradiation hardening of a Fe9Cr ferritic model alloy through nanoindentations. 📚 Title: "Study of the irradiation hardening of a Fe9Cr ferritic model alloy by nanoindentations" 🔗 Read the full paper here: https://lnkd.in/eFwyHNDe #IrradiationHardening #Nanoindentations #SizeEffect

Excited to share our latest publication in Scientific Reports from the Springer Nature Group: "Integrating Core Physics and Machine Learning for Improved Parameter Prediction in Boiling Water Reactor Operations." Thanks to the collaboration between Purdue University School of Nuclear Engineering and Blue Wave AI Labs that makes this work possible. Also, I want to express my appreciation to my advisors, supervisors, and co-authors: Jonathan Nistor, Tom Gruenwald, and Yunlin Xu. https://lnkd.in/gUMvvVAi Here, we explore the synergy between traditional reactor physics simulation and advanced machine learning techniques to enhance the prediction of key parameters in boiling water reactor operations. Check out the full article for insights into how this integrated approach can lead to more efficient and safer BWR operations.

STSL student Raj Agarwal and STSL Alumnus Dr. Matthew Hughes who is now a postdoctoral research associate at the Red lab at MIT Department of Nuclear Science and Engineering presented their work entitled "Identifying steady and pulsatile two-phase flow regimes with pressure drop signals and acoustic emissions" at the Eurotherm 2024 Conference in Bled, Slovenia on 10th to 13th June.  Their paper was well received by the ~350 researchers in the thermal sciences worldwide. This study presents a new flow regime identification technique using high-resolution pressure drop signals and acoustic emission spectra. The resulting framework can adapt to dynamic operating conditions, benefiting various thermal systems and phase-change processes. #Eurotherm #STSL #pressuresignal #twophase #congratulations

I am thrilled to announce that I have successfully completed the "Neutron Transport at the Fuel Cell and Assembly Levels" course offered by Gre@t Pioneer Project!  This course has equipped me with an in-depth understanding and practical skills that are critical in nuclear engineering and simulation. Here’s a glimpse of what I’ve mastered: Decoding the Boltzmann Linear Transport Equation: I've delved into the complexities of this equation and approaches to solve neutron transport problems. Practical Implementation in Simulation Environments: I’ve gained hands-on experience in applying these numerical approaches, boosting my practical expertise. Confidence in Simulation Tools: My proficiency with both deterministic and Monte Carlo tools for simulating neutron transport has significantly increased. I am eager to apply this knowledge in my work. A big thank you to the instructors Prof. Christoph Demazière, Prof. Sandra Dulla, Assoc. Prof. Máté Szieberth, Gergely Klujber  and friends at Gre@t Pioneer at Göteborg for their guidance and support throughout this journey. Here's to continuous learning and making a difference in the world of nuclear engineering! Best part is, it was just a beginning. #NuclearEngineering #Simulation #ProfessionalGrowth #GreatPioneer #ContinuedLearning #NeutronTransport

I learned a wild fact recently - my Great Great Grand Doctoral Advisor was none other than J. Robert Oppenheimer. I've independently checked the lineage of doctoral theses to verify this. The fascinating and winding path of thesis titles that lead to my career are:  “Beta Ray Spectra” J. Robert Oppenheimer, 1939  “Four Studies in Theoretical Physics: I. The Theory of the Synchrotron. II. Theory of the Synchro-cyclotron. III. On the Meson Theory of Nuclear Forces. IV. The Energy-Momentum Relation for Particles Interacting with Fields.”  Leslie Lawrance Foldy, 1948 “Second-Quantized Theory Of Spin 1/2 Particles In Nonrelativistic Limit” Richard Kent Osborn 1952  “Kinetic Theory of The Interaction Of Radiation With Plasmas” Thomas E. Blue, 1978  “135Xe in LEU Cermet Nuclear Thermal Propulsion Systems” Michael Eades, 2016 This is of little consequence, but at least for me it's interesting. Screen shot from https://lnkd.in/gFqRrDNp

Neutron Slowing Down Experiments In the early 1930s, Enrico Fermi, an Italian physicist at the University of Rome, embarked on groundbreaking studies of neutron bombardment. He believed that neutrons, being neutral, could penetrate atomic nuclei more effectively than charged particles and thus generate nuclear reactions. Fermi began bombarding various elements, including uranium, using a simple neutron source made from radon and beryllium. When Fermi bombarded uranium, he noticed some perplexing results—multiple radioactive products were formed, not fitting existing theories. An accidental yet very consequential discovery happened when he used paraffin wax, rich in hydrogen, which slowed down the neutrons, enhancing the nuclear reactions! This idea of neutron moderation would become a key principle in nuclear reactor design, including Fermi's later work on the first controlled use of nuclear fission at the University of Chicago. Fermi's findings, although not fully recognized initially, laid the groundwork for understanding nuclear reactions. It wasn't until 1938, when Lise Meitner and Otto Frisch identified the reaction as nuclear fission, that the significance of Fermi's work was realized. They showed that bombarding uranium could split its nucleus, releasing immense energy, validating Einstein's E=mc². #engineering #science #research #security #graduateschool #graduatestudent  #mtvconsortium #phd #phdstudent #neutron #detection #imaging #safeguards #nonproliferation #history #fission #physics Nuclear Engineering and Radiological Sciences—University of Michigan University of Michigan College of Engineering

I’m excited to share that I have successfully graduated from my program in theoretical physics and I am now pursuing a new journey as Doctor of Philosophy at Kungliga Tekniska högskolan! My master’s thesis focuses on the dynamics of nuclear clusters inside a Neutron star. For those interested, you can read the full text here:

The global increase in energy demand is accelerating the shift towards nuclear energy in our country as well. Industries such as nuclear energy and aviation require innovative materials with superior mechanical properties that can provide protection against gamma and neutron radiation. In my research, I developed two new gadolinium and tungsten-reinforced aluminum-based metal composites using the mechanical alloying method. The effects of the volumetric ratios of tungsten (W) and gadolinium (Gd) particles and the applied heat treatment on the microstructures of Al-Gd2O3 were examined. Material characterization was performed through comprehensive mechanical and thermal analyses. We have demonstrated that these aluminum matrix composites are promising materials suitable for industrial use in radiation shielding. I am pleased to announce that I presented these findings in two papers at the 16th International Ejons Science Congress. Finally, I would like to thank Doc. Dr. Celal Kursun for his support. #NuclearEnergy #MaterialScience #RadiationShielding #Innovation #ScienceCongress #MechanicalAlloying #AviationIndustry #AcademicPublishing

#Euratom Awards Special Issue 🏆 📅 Deadline for abstract submission: 15th September 2024 📧 Submit your abstracts: abstract@fisa-euradwaste2025.pl We are excited to help spread the word about the Euratom Awards Special Issue, celebrating groundbreaking research and innovation in the nuclear sector across EU Member States and Euratom-associated countries. 🌍 As part of the open call for proposals, the nine winning entries will have the chance to feature their innovative work in this special edition. The contest aims to identify and recognize disruptive innovations across the entire product development and supply chain —from research to market— where researchers and engineers play a pivotal role. 🛠️💡 In addition to the Nuclear Innovation Prizes, the research community is invited to submit abstracts showcasing original research in areas like reactor systems, radioprotection, and radioactive waste management. 🌐 Priority will be given to young researchers and PhD students, emphasizing the next generation's role in the nuclear research community. Criteria for Evaluation: ✨ Originality and replicability ⚙️ Technical excellence 💶 Economic impact and innovation potential Don't miss this opportunity to share your research! 🌟 #NuclearInnovation #Research #Euratom #NuclearScience #InnovationAwards #YoungResearchers #PhD #ENEN #EUResearch #Radioprotection #ReactorSystems #WasteManagement #Warsaw