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Research Themes

  • Nuclear reactor safety
  • Nuclear reactor and system analysis and optimization 
  • Validation and uncertainty of CFD codes
  • Sub-channel analysis of advanced fuel designs
  • HTR thermal hydraulics and reactor physics
  • Small modular reactors
  • Integration of PRA and best estimate codes
  • Loading optimization for current and advanced reactors
  • Flow visualization in complex reactor geometries (PIV)
  • Data uncertainty validation and uncertainties
  • Advanced reactor instrumentation
  • 3-dim study of two-phase flows
  • Core hot-spot prediction
  • Studies in response to critical industry needs


  • Published results on gas/liquid flooding in large diameter tubes
  • Published results on modeling condensation heat transfer
  • Published integrated system evaluation results for HTRs
  • Developing evaluation capabilities for HTR’s (NRC)
  • Integrated code system for advanced systems (SNL)
  • First-of-a-kind three-dim fuel management and instrumentation 


Yassin A. Hassan

  • Professor, Nuclear Engineering and Mechanical Engineering
  • L.F. Peterson '36 Chair II Professor
  • University Distinguished Professor
  • Regents Professor
  • Director, Center for Advanced Small Modular and Microreactors (CASMR)
  • Member, National Academy of Engineering
  • Office: AI Engineering Building (AIEN) M203
  • Phone: 979-218-4417
  • Email:
Yassin A. Hassan

Karen Vierow Kirkland

  • Professor, Nuclear Engineering
  • Associate Department Head, Nuclear Engineering
Karen Vierow Kirkland

Pavel V. Tsvetkov

  • Professor, Nuclear Engineering
  • Director, Graduate Program, Nuclear Engineering
  • Affiliated Faculty, Multidisciplinary Engineering
Pavel V. Tsvetkov

Cable Kurwitz

  • Instructional Professor, Nuclear Engineering
  • Associate Research Engineer, Texas A&M Engineering Experiment Station
Cable Kurwitz

Mark Kimber

  • Associate Professor, Nuclear Engineering
Mark Kimber