The Consortium for Advanced Simulation of Light Water Reactors (CASL) was established to provide leading edge modeling and simulation (M&S) capability to improve the performance of currently operating light water reactors. Our vision is safer and more productive commercial nuclear power production afforded through comprehensive science-based predictive M&S technology deployed and applied broadly by the U.S. nuclear energy industry. Towards that end, CASL is developing the Virtual Environment for Reactor Applications, VERA. CASL's VERA software simulates nuclear reactor physical phenomena using coupled multi-physics models. VERA's current physics capabilities include neutron transport, thermal-hydraulics, fuel performance, and coolant chemistry.

CRUD-Induced Power Shift (CIPS) Prediction Capability Demonstrated with VERACRUD-Induced Power Shift (CIPS) Prediction Capability Demonstrated with VERA

During FY15, CASL significantly advanced VERA’s capability to model the CRUD Challenge Problem to predict the occurrence of CRUD Induced Power Shift (CIPS).  VERA has been modified to include the space and time dependent deposition of CRUD onto the fuel, along with boron capture and its effects on local rod power and thermal hydraulic conditions.  Early in CASL’s program, coolant chemistry  subcomponents (MAMBA and MAMBA-BDM) were developed to describe local CRUD deposition.  Since then the coolant chemistry subcomponents have been  integrated within VERA’s subchannel thermal-hydraulics and neutronics  subcomponents.  Most recently all three subcomponents have been coupled within VERA, allowing VERA to simulate multiple cycles of operation to simulate CIPS.  Read more

Journal and Conference Papers

 * Chatzikyriakou, D., J. Buongiorno, D. Caviezel and D. Lakehal, "DNS and LES of Turbulent Flow in a Closed Channel Featuring a Pattern of Hemispherical Roughness Elements," International Journal of Heat and Fluid Flow, Volume 53, pp. 29–43, June 6, 2015.

 * Walsh, J.A., B. Forget, K.S. Smith and P.K. Romano, "Optimizations of the Energy Grid Search Algorithm in Continuous-energy Monte Carlo Particle Transport Codes," Computer Physics Communications, Elsevier, Volume Online, June 5, 2015.

 * Larsen, E.W., and T.J. Trahan, "Asymptotic, Multigroup Flux Reconstruction and Consistent Discontinuity Factors," Journal of Nuclear Science and Technology, Issue Published online, May 12, 2015.

Technical Reports

 * Godfrey, A.T., Collins, B.S., Gentry, C.A., Stimpson, S.G., Ritchie, J.A., Watts Bar Unit 2 Startup Results with VERA, CASL Technical Report: CASL-U-2017-1306-000, March 31, 2017.

 * Palmtag, S.MPACT Library Verification by Comparison of Assembly Calculations to Monte Carlo Results, CASL-U-2016-1052-000, March 31, 2016.

 * Khuwaileh, B.A., Turinsky, P.J., Data Assimilation and Uncertainty Quantification Using VERA-CS for a Core Wide LWR Problem with Depletion, CASL Technical Report: CASL-U-2016-1054-000, March 23, 2016.


 * Chatzikyriakou, D., J. Buongiorno, D. Caviezel and D. Lakehal, "DNS and LES Gehin, J.C., CASL Program Highlights June 2015, June 30, 2015, 2015.

 * Chatzikyriakou, D., J. Buongiorno, D. Caviezel and D. Lakehal, "DNS and LES Adams, B., and V. Mousseau, Credible Simulation, Emphasizing Sensitivity, Uncertainty, and Calibration, 2015 CASL Student Workshop, June 19, 2015, Sandia National Laboratories, Albuquerque, New Mexico, 2015.

 * Chatzikyriakou, D., J. Buongiorno, D. Caviezel and D. Lakehal, "DNS and LES Gehin, J.C., CASL Program Highlights May 2015, May 30, 2015, 2015.

  • Electric Power Research Institute
  • Idaho national Laboratory
  • Los Alamos National Laboratory
  • Massachusetts Institute of Technology
  • University of Michigan
  • North Carolina State University
  • Oak Ridge National Laboratory
  • Sandia National Laboratory
  • Tennessee Valley Authority
  • Westinghouse Electric Company

CASL is the first United States Energy Innovation Hub established by the Department of Energy in 2010. CASL connects fundamental research and technology development through an integrated partnership of government, academia, and industry the extends across the nuclear energy enterprise. Read more about the CASL organization here.