Dr. Kevin T. Clarno
UT Shield

Dr. Kevin T. Clarno

Kevin Clarno, Mechanical Engineering Professor in the Nuclear and Radiation Engineering Program and Core Faculty member of the Oden Institute for Computational Engineering and Sciences at the University of Texas at Austin leads a team of researchers focus on computational nuclear energy modeling and simulation for light-water and advanced nuclear reactors

Publications

Kevin Clarno’s ORCID: 0000-0002-5999-2978

Refereed Journal Articles

  1. T. Price, K.T. Clarno, O. Chvala, “A Theory And Analysis of The Impact of Gas In The Dynamical Behavior of the Molten Salt Research Reactor Leading To The Computation of the Gas Coefficients of Reactivity,” Nuclear Science and Technology Open Research (NSTOR, (submitted) August 2023.
  2. T. Price, O. Chvala, K.T. Clarno, “The Impact of Gas on Molten Salt Reactor Nuclear Behavior,” ASME Journal of Nuclear Engineering and Radiation Science, (accepted) August 2023.
  3. T. Price. O. Chvala, K.T. Clarno, “The Transfer of Xenon-135 to Molten Salt Reactor Graphite,” ASME Journal of Nuclear Engineering and Radiation Science, (submitted) August 2022.
  4. J. Barlow, T. Sawyer, K. Clarno, J. Scherr, J. Hearne, P. Tsvetkov, “Evaluation of SCALE, Serpent, and MCNP for Molten Salt Reactor Applications using the MSRE Benchmark,” Annals of Nuclear Energy, 194, 10.1016/j.anucene.2023.110092, December, 2023.
  5. R. Salko, A. Wysocki, T. Blyth, A. Toptan, J. Hu, V. Kumar, C. Dances, W. Dawn, Y. Sung, V. Kucukboyaci, W. Gurecky, T. Lange, X. Zhao, J. Rader, C. Jernigan, B. Collins, M. Avramova, J. Magedanz, S. Palmtag, K. Clarno, “CTF: A modernized, production-level, thermal hydraulic solver for the solution of industry-relevant challenge problems in pressurized water reactors,” Nuclear Engineering and Design, 597, 10.1016/j.nucengdes.2022.111927, October 2022.
  6. C. Bourque, K. Clarno, B. Leibowicz, “High Level Fuel Fabrication Facility Designs from Discrete-Event Simulation,” Annals of Nuclear Energy, 168, 10.1016/j.anucene.2021.108893, December 2021.
  7. M. Poschmann, M. Piro, T. Besmann, K. Clarno, S. Simunovic, “Thermochemically-Informed Mass Transport Model for Interdiffusion of U and Zr in Irradiated U-Pu-Zr Fuel with Fission Products,” Journal of Nuclear Materials, 554, 10.1016/j.jnucmat.2021.153089, October 2021.
  8. P. Gulabrao, K. Clarno, “Buildup with Bremsstrahlung in the Martian Atmosphere,” Nuclear Science and Engineering, 10.1080/00295639.2020.1794455, September 2020.
  9. S. Stimpson, K. Clarno, R. Pawlowski, R. Gardner, J. Powers, B. Collins, A. Toth, S. Novascone, S. Pitts, J. Hales, G. Pastore, “Coupled Fuel Performance Calculations in VERA and Demonstration on Watts Bar Unit 1, Cycle 1,” Annals of Nuclear Energy, 145, 10.1016/j.anucene.2020.107554, September 2020.
  10. S. Simunovic, T. Besmann, E. Moore, M. Poschmann, M. Piro, K. Clarno, J. McMurray, W. Wieselquist, “Modeling and Simulation of Oxygen Transport in High Burnup LWR Fuel,” Journal of Nuclear Materials, 538, 10.1016/j.jnucmat.2020.152194, September 2020.
  11. R. Salko, W. Pointer, M. Delchini, W. Gurecky, K. Clarno, et al., “Implementation of a Spacer Grid Rod Thermal Hydraulic Reconstruction (ROTHCON) Capability into the Thermal Hydraulic Subchannel Code CTF,” Nuclear Technology, 205(12), 10.1080/00295450.2019.1585734, December 2019.
  12. K. Kim, M. Williams, D. Wiarda, K. Clarno, “Development of the Multigroup Cross Section Library for the CASL Neutronics Simulator MPACT: Method and Procedure,” Annals of Nuclear Energy, 133, 46-58, 10.1016/j.anucene.2019.05.010, Nov. 2019.
  13. A. Toptan, R. Salko, M. Avramova, K. Clarno, D. Kropaczek, “A new fuel performance modeling framework, CTFFuel, with a case study on the fuel thermal conductivity degradation,” Nuclear Engineering and Design, 341, 248-258, 10.1016/j.nucengdes.2018.11.010, January 2019.
  14. N. Capps, S. Stimpson, K. Clarno, B. Wirth, J. Rashid, “Assessment of the analysis capability for core-wide PWR pellet-clad interaction screening of Watts Bar Unit 1,” Nuclear Engineering and Design, 333, 131–144, https://doi.org/10.1016/j.nucengdes.2018.04.018, July 2018.
  15. S. Stimpson, J. Powers, K. Clarno, et al., “Pellet-clad mechanical interaction screening using VERA applied to Watts Bar Unit 1, Cycles 1–3,” Nuclear Engineering and Design, 327, 172–186, https://doi.org/10.1016/j.nucengdes.2017.12.015, 2018.
  16. S. Stimpson, Y. Liu, B. Collins, K. Clarno, “A Lumped Parameter Method of Characteristics Approach and Multigroup Kernels Applied to the Subgroup Self-shielding Calculation in MPACT,” Nuclear Engineering and Technology, 49(6), 1240–1249, https://doi.org/10.1016/j.net.2017.07.006, 2017.
  17. B. Kochunas, B. Collins, S. Stimpson, R. Salko, D. Jabaay, A. Graham, Y. Liu, K. Kim, W. Wieselquist, A. Godfrey, K. Clarno, et al, “VERA Core Simulator Methodology for Pressurized Water Reactor Cycle Depletion,” Nuclear Science and Engineering, 185(1), 217–231, https://doi.org/10.13182/NSE16-39, 2017.
  18. J. Turner, K. Clarno, et al, “The Virtual Environment for Reactor Applications (VERA): Design and architecture,” Journal of Computational Physics, 326, 544–568, 2016.
  19. S. Hamilton, M. Berrill, K. Clarno, et al, “An Assessment of Coupling Algorithms for Nuclear Reactor Core Physics Simulations” Journal of Computational Physics, 311, 241–257, 2016.
  20. M. Piro, J. Banfield, K. Clarno, et al., Corrigendum to “Coupled thermochemical, isotopic evolution and heat transfer simulations in highly irradiated UO2 nuclear fuel,” Journal of Nuclear Materials, 478, 375–377, 2016.
  21. R. Schmidt, K. Belcourt, R. Hooper, R. Pawlowski, K. Clarno, et al, “An Approach for Coupled-Code Multiphysics Core Simulations from a Common Input,” Annals of Nuclear Energy, 84, 140–152, 2015.
  22. B. Philip, M. Berrill, S. Allu, S. Hamilton, R. Sampath, K. Clarno, and G. Dilts, “A Parallel Multi-Domain Solution Methodology Applied to Nonlinear Thermal Transport Problems in Nuclear Fuel Pins,” Journal of Computational Physics, 286, 143–171, Apr 2015.
  23. A. Phillippe, K. Clarno, et al., “A Validation Study of Pin Heat Transfer for MOX Fuel Based on the IFA-597 Experiments,” Nuclear Science and Engineering, 178(2), 2014.
  24. A. Phillippe, K. Clarno, et al., “A Validation Study of Pin Heat Transfer for UO2 Fuel Based on the IFA-432 Experiments,” Nuclear Science and Engineering, 177(3), 2014.
  25. M. Piro, J. Banfield, K. Clarno, et al., “Coupled thermochemical, isotopic evolution and heat transfer simulations in highly irradiated UO2 nuclear fuel,” Journal of Nuclear Materials, 441, 240–251, 2013.
  26. K. Clarno et al., “The AMP (Advanced MultiPhysics) Nuclear Fuel Performance Code,” NuclearEngineering and Design, 252(1), 108–120, Nov 2012.
  27. G. Yesilyurt, K. Clarno, et al, “C5 Benchmark Problem with Discrete Ordinate Radiation Transport Code Denovo,” Nuclear Science and Engineering, 176(2), 274–283, Nov 2011.
  28. T. Evans, K. Clarno, and J. Morel, “A Transport Acceleration Scheme for Multigroup Discrete Ordinates with Upscattering,” Nuclear Science and Engineering, 165(3), 292–304 (2010).
  29. T. Evans, A. S. Stafford, and K. Clarno, “Denovo–A New Three-Dimensional Parallel Discrete Ordinates Code in SCALE,” Nuclear Technology, 171(2), 171–200 (2010).
  30. D. Williams and K. Clarno, “Evaluation of Salt Coolants for Reactor Applications,” Nuclear Technology,163(3), 330–343 (2008).
  31. Z. Zhong, K. Clarno, T. Downar, and M. DeHart, “Implementation of a Two-Level Coarse Mesh Finite Difference Acceleration of an Arbitrary Geometry Two-Dimensional Discrete-Ordinates Transport Method,” Nuclear Science and Engineering, 158(3), 289–298 (2008).
  32. K. Clarno and M. Adams, “Capturing the Effects of Unlike Neighbors in Single-Assembly Calculations,” Nuclear Science and Engineering, 149(2), 182–196 (2005).
  33. K. Clarno and Y. Hassan, “Development of a RELAP5-3D Multi-dimensional Model of a VVER1000 NPP for Analysis of a LB LOCA,” Nuclear Technology, 141(2), 142–156 (2003).

 

Refereed Conference Proceedings

  1. K. Luna, B. Collins, N. Herring, K.T. Clarno, “Initial Benchmark Comparisons of KENO-IV and MPACT for MSRR Criticality Evaluations,” Trans. of the Am. Nucl. Soc., 128, 1, November 2023.
  2. O. Chvala, K.T. Clarno, V. Sobes, N. Walton, “Temperature Dependency of Multiplication Factor with Fuel Intrusion into Moderator in Serpent and SCALE”, Trans. of the Am. Nucl. Soc., 128, 1, November 2023.
  3. C. Brennan, K.T. Clarno, “Proper Orthogonal Decomposition-based Nonlinear Acceleration for Fuel Depletion Calculations,” M&C 2023, Niagra Falls, CA, August 2023.
  4. J. Barlow, K.T. Clarno, “Verification of TRITON for Molten Salt Reactors,” M&C 2023, Niagra Falls, CA, August 2023.
  5. T. Price, K.T. Clarno, O. Chvala, “Overview and Review of the Plugging Problem in Molten Salt Reactors,” Trans. of the Am. Nucl. Soc., 127, 1, November 2022.
  6. T. Price, O. Chvala, K.T. Clarno, “A Theory of Gas Behavior in Molten Salt Reactors and its Impact on Reactivity,” Trans. of the ANS, 126, 1, June 2022.
  7. C. Brennan, H. Park, E. Shemon, “Demonstration of MOOSE-Based Griffin Reactor Physics Code for Heterogeneous Lead-Cooled Fast Reactor Analysis,” Physor 2022 Topical Meeting, Pittsburg, PA, May 2022.
  8. J. Ross, K. Clarno, K. Gerez, Y. Choi, “Development of a Point Kinetics Subroutine for Molten Salt Reactors in RELAP5-3D,” Physor 2022 Topical Meeting, Pittsburg, PA, May 2022.
  9. D. Wray, K. Clarno, B. Mervin, “Analysis of Increased Risk of PCI Failures for PWR Fuel cycles featuring Mid-Cycle Power Maneuvers,” TopFuel 2021 Topical Meeting, 148-1337, File Download Link, Santander, Spain, Oct. 2021.
  10. K. Clarno, T. Sawyer, T. Besmann, “High-Resolution Isotopic Evaluations of High Burnup, High-Assay LEU Fuel Samples for Thermochemical Analysis,” TopFuel 2021 Topical Meeting, 57-1337, File Download Link, Santander, Spain, Oct. 2021.
  11. C. Brennan, K. Clarno, “Proper Orthongonal Decomposition-Based Nonlinear Acceleration for Fuel Depletion Calculations,” ANS Mathematics and Computations Topical Meeting (M&C2021), p 466-478, Proceedings Webpage, 10.13182/M&C21-33770, Raleigh, NC, Oct. 2021.
  12. B. Collins, S. Palmtag, A. Godfrey, T. Downar, K. Clarno, “Capability of VERA 4,” CASL Topical Meeting, Nov. 2020.
  13. S. Stimpson, B. Collins, Y. Liu, K. Clarno, B. Kochunas, “Subgroup and MOC Performance Improvements in MPACT,” CASL Topical Meeting, Nov. 2020.
  14. S. Stimpson, K. Clarno, R. Pawlowski, R. Gardner, J. Powers, B. Collins, A. Toth, S. Novascone, S. Pitts, J. Hales, G. Pastore, “Coupled Fuel Performance calculations in VERA through Tiamat,” CASL Topical Meeting, Nov. 2020.
  15. T. Sawyer, K. Clarno, “Evaluating Methods for Modeling Disk Fuel Samples with SCALE,” ANS Winter Meeting, Nov. 2020.
  16. C. Bourque, C. Thompson, K. Clarno, B. Leibowicz, “Coupling Simulation Technologies to Assist in Nuclear Fuel Fabrication Facility Design,” ANS Winter Meeting, Nov. 2020.
  17. J. Barlow, K. Casuga, J. Pauly, S. Vazquez, T. Sawyer, K. Clarno, “Characterizing the Properties of Spent Nuclear Fuel,” ANS Winter Meeting, Nov. 2020.
  18. J. Barlow, K. Clarno, “Validation of SCALE for Molten Salt Reactors using the MSRE Benchmark,” ANS Winter Meeting,  Nov. 2020.
  19. J. Barlow, K. Clarno, “Quantifying Fuel Bonding through Activation Analysis,” ANS Winter Meeting, Nov. 2020.
  20. T. Sawyer, K. Clarno, “Isotopic Validatoin Study of SCALE for HALEU with IFA-601 Experimental Data,” ANS Winter Meeting, Nov. 2020.
  21. C. Bourque, K. Clarno, B. Leibowicz, “Coupling Simulation Technologies to Assist Fuel Fabrication Facility Design Process,” Radiation Protection and Shielding ANS Topical Meeting, Nov 2020.
  22. P. Gulabrao, K. Clarno, “Buildup with Bremsstrahlung in the Martian Atmosphere,” Radiation Protection and Shielding ANS Topical Meeting, Nov 2020; conference canceled due to COVID.
  23. T. Sawyer, K. Clarno, “Isotopic Validation Study of SCALE in 2-Dimensions Using IFA-601 Nuclear Fuel Experimental Results,” Proceedings of the ANS Student Conference, Mar 2020; conference canceled due to COVID.
  24. K. Clarno, J. Barlow, K. Casuga, J. Pauly, S. Vazquez, T. Sawyer, “Characterizing the properties of spent nuclear fuel,” Proceedings of the ANS Student Conference, Mar 2020; conference canceled due to COVID.
  25. J. Parga, S. Landsberger, K. Clarno, “Initial Development of Radiation Protection MCNP Modeling in Neutron Activation Analysis (NAA) Laboratories,” Proceedings of the ANS Winter Meeting, Nov 2019.
  26. S. Landsberger, W. Charlton, K. Clarno, D. Boravino, J. Mace, T. Diaz, “A PhD Distance Learning Program: A Unique Educational Collaboration with the University of Texas and Los Alamos National Laboratory,” Proceedings of the ANS Winter Meeting, Nov 2019.
  27. S. Stimpson, K. Clarno, et al, “Demonstration of Coupled Fuel Performance Calculations in VERA on Watts Bar Unit 1, Cycle 1,” Proceedings of PHYSOR 2018 – Reactor Physics Paving the Way Towards More Efficient Systems, Cancun, Mexico, Apr 2018.
  28. B. Collins, J. Galloway, R. Salko, K. Clarno, et al, “Whole core CRUD-Induced Power Shift Simulations Using VERA,” Proceedings of PHYSOR 2018 – Reactor Physics Paving the Way Towards More Efficient Systems, Cancun, Mexico, Apr 2018.
  29. J. Powers, S. Stimpson, K. Clarno, et al, “Demonstration of Fully Coupled Multiphysics Simulations for Watts Bar Unit 1,” Proceedings of the 2017 Water Reactor Fuel Performance Meeting (WRFPM 2017)  Sep 2017.
  30. S. Stimpson, K. Clarno, et al., “Effect of Clad Fast Neutron Flux Distribution on Quarter-Core BISON Fuel Performance Calculations,” 2017 Water Reactor Fuel Performance Meeting, Sep 2017.
  31. K. Kim, M. Williams, D. Wiarda, K. Clarno, et al., “Development of the CASL-VERA V4.2m5 MPACT 51-group Libraries for ENDF/B-VII.0 and VII.1,” M&C International Conference on Mathematics & Computational Methods Applied to Nuclear Science and Engineering, South Korea, Apr 2017.
  32. S. Stimpson, Y. Liu, B. Collins, K. Clarno, “A Multigroup, Lumped Parameter MOC Method for Subgroup Self-Shielding in MPACT,” M&C International Conference on Mathematics & Computational Methods Applied to Nuclear Science and Engineering, South Korea, Apr 2017.
  33. S. Stimpson, K. Clarno, et al., “Assessing Pellet-Clad Interaction with VERA: WBN1, Cycles 6–7,” Top Fuel, Boise, ID, Sep 2016.
  34. B. Collins, R. Salko, S. Stimpson, K. Clarno, et al., “Simulation of CRUD Induced Power Shift Using the VERA Core Simulator and MAMBA,” PHYSOR 2016, Sun Valley, ID, May 2016.
  35. A. Godfrey, K. Clarno, et al., “VERA Benchmarking Results for Watts Bar Nuclear Plant Unit 1 Cycles 1–12,” PHYSOR 2016, Sun Valley, ID, May 2016.
  36. S. Stimpson, J. Powers, K. Clarno, et al., “Assessment of Pellet-Clad Interaction Indicators in Watts Bar Unit 1, Cycles 1–3 Using VERA,” PHYSOR 2016, Sun Valley, ID, May 2016.
  37. B. Rearden, K. Bekar, C. Celik, K. Clarno, “Criticality Safety Enhancements for SCALE 6.2 and Beyond,” ICNC 2015, Charlotte, NC, Sep 2015.
  38. A. Toth, C. Kelly, S. Slattery, S. Hamilton, K. Clarno, and R. Pawlowski, “Analysis of Anderson Acceleration on a Simplified Neutronics/Thermal Hydraulics System,” Joint International Conference on Mathematics and Computation (M&C 2015), Supercomputing in Nuclear Applications (SNA-2015) and Monte Carlo Methods (MC-2015), Nashville, TN, Apr 2015.
  39. B. Rearden, R. Lefebvre, J. Lefebvre, K. Clarno, et al., “Modernization Strategies for SCALE-6.2,” Joint International Conference on Mathematics and Computation (M&C 2015), Supercomputing in Nuclear Applications (SNA-2015) and Monte Carlo Methods (MC-2015), Nashville, TN, Apr 2015.
  40. K. Clarno, R. Pawlowski, R. Montgomery, T. Evans, B. Collins, B. Kochunas, D. Gaston, and J. Turner, “High-Fidelity Modeling of Pellet-Clad Interaction using the CASL Virtual Environment for Reactor Analysis” Joint International Conference on Mathematics and Computation (M&C 2015), Supercomputing in Nuclear Applications (SNA-2015) and Monte Carlo Methods (MC-2015), Nashville, TN, Apr 2015.
  41. R. Pawlowski, K. Clarno, R. Montgomery, R. Salko, T. Evans, J. Turner, and D. Gaston, “Design of a High-Fidelity Core Simulator for Analysis of Pellet-Clad Interaction,” Joint International Conference on Mathematics and Computation (M&C 2015), Supercomputing in Nuclear Applications (SNA-2015) and Monte Carlo Methods (MC-2015), Nashville, TN, Apr 2015.
  42. B. Kochunas, B. Collins, D. Jabaay, S. Stimpson, K. Clarno, S. Palmtag, T. Downar, and J. Gehin, “VERA Core Simulator Methodology for PWR Cycle Depletion,” Joint International Conference on Mathematics and Computation (M&C 2015), Supercomputing in Nuclear Applications (SNA-2015) and Monte Carlo Methods (MC-2015), Nashville, TN, Apr 2015.
  43. S. Palmtag, K. Clarno, et al., “Coupled Neutronics and Thermal-Hydraulics Solutions of a Full-Core PWR Using VERA-CS,” PHYSOR 2014 – The Role of Reactor Physics toward a Sustainable Future (PHYSOR-2014), Kyoto, Japan, Sep 2014.
  44. K. Clarno, M. Berrill, S. Hamilton, R. Pawlowski, J. Turner, “Advanced Coupling Explorations for Parallel Coupled Neutronic and Thermal-Hydraulic Simulation,” SIAM Conference on Parallel Processing, Portland, OR, Feb 2014.
  45. R. Pawlowski, K. Clarno, et al, “Code Integration Strategies for Large-Scale Reactor Simulation,” SIAM Conference on Parallel Processing, Portland, OR, Feb 2014.
  46. M. Piro, J. Banfield, K. Clarno, “Simulation of Thermochemistry and Isotopic Evolution of Irradiated Nuclear Fuel,” Trans. Am. Nucl. Soc., Jun 2013.
  47. S. Hamilton, K. Clarno, et al., “Multiphysics Simulations for LWR Analyses,” International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2013), Sun Valley, ID, May 2013.
  48. J. Hansel, J. Ragusa, S. Allu, M. Berrill, K. Clarno, “Analysis of Physics-Based Preconditioning for Single-Phase Subchannel Equations,” International Conference on Mathematics and Computational Methods Applied to Nuclear Science and Engineering (M&C 2013), Sun Valley, ID, May 2013.
  49. Y. Yan, B. Radhakrishnan, G. Sarma, K, Clarno, “Observation and Mechanism of Hydride in Zircaloy-4 and Local Hydride Re-orientation Induced by High Pressure at High Temperature,” International High-Level Radioactive Waste Management, Albuquerque, NM, May 2013.
  50. B. Radhakrishnan, S. Gorti, Y. Yong, K. Clarno, “Phase Field Simulations of Hydride Reorientation in Zircaloys,” International High-Level Radioactive Waste Management, Albuquerque, NM, May 2013.
  51. Philip, K. Clarno, R. Sampath, M. Berrill, S. Allu, G. Dilts, and P. Barai, “The Advanced Multi-Physics (AMP) Package with an Application to Fuel Assemblies in Nuclear Reactors,” 2012 SIAM Annual Meeting, Minneapolis, MN, Jul 9–13, 2012.
  52. J. Banfield, K. Clarno, S. Hamilton, G. I. Maldonado, B. Philip, and M. L. Baird, “Benchmarking of Software and Methods for Use in Transient Multidimensional Fuel Performance with Spatial Reactor Kinetics,” ICAPP ’12, Chicago, IL, Jun 24–28, 2012.
  53. K. Clarno, S. Hamilton, B. Philip, R. Sampath, S. Allu, M. Berrill, P. Barai, and J. Banfield, “Integrated Radiation Transport and Thermo-Mechanics Simulation of a PWR Assembly,” Trans. Am. Nucl. Soc. 106, 2012.
  54. B. Philip, R. Sampath, S. Hamilton, M. Berrill, S. Allu, and K. Clarno, “Computational Approach to Nuclear Fuel Assembly Simulation,” Trans. Am. Nucl. Soc. 106, 2012.
  55. M. Piro, J. Banfield, S. Simunovic, T. Besmann, and K. Clarno, “Computational Thermodynamics in the Advanced Multi-Physics Code,” Trans. Am. Nucl. Soc. 106, 1384–1386, 2012.
  56. M. Piro, S. Simunovic, T. Besmann, and K. Clarno, “Coupling Thermodynamic Computations with Multi-Physics Nuclear Fuel Codes,” Computer Coupling of Phase Diagrams and Thermochemistry (CALPHAD), Berkeley, CA, Jun 3–8, 2012.
  57. S. Hamilton, K. Clarno, B. Philip, M. Berrill, R. Sampath, and S. Allu, “Integrated Radiation Transport and Nuclear Fuel Performance for Assembly-Level Simulations,” PHYSOR 2012—Advances in Reactor Physics—Linking Research, Industry, and Education, Knoxville, Tenn., Apr 15–20, 2012, on CD-ROM, American Nuclear Society, LaGrange, Park, IL, 2012.
  58. S. Hamilton, K. Clarno, B. Philip, R. Sampath, M. Berrill, S. Allu, M. Baird, and J. Banfield, “Coupled Radiation Transport and Thermomechanics Using the AMP and Denovo Codes,” Twelfth Copper Mountain Conference on Iterative Methods, Copper Mountain, CO, Mar 25–30, 2012.
  59. B. Philip, K. Clarno, R. Sampath, M. Berrill, S. Allu, and G. Dilts, “The Advanced Multi-Physics (AMP Package),” Twelfth Copper Mountain Conference on Iterative Methods, Copper Mountain, CO, Mar 25–30, 2012.
  60. B. Philip, K. Clarno, R. Sampath, M. Berrill, and S. Allu, “A Jacobian Free Newton Krylov Method with Multilevel Block Preconditioning for Multi-Domain Quasistatic Thermomechanics,” Twelfth Copper Mountain Conference on Iterative Methods, Copper Mountain, CO, Mar 25–30, 2012.
  61. J. Banfield et al., “Quasi-Static Validation of the AMP Nuclear Fuel Performance Code,” Trans. Am. Nucl. Soc. 104, Jun 2011.
  62. G. Yesilyurt, K. Clarno, I. C. Gauld, and J. D. Galloway, “Modular ORIGEN-S for Multi-Physics Code Systems,” Proceedings of the Mathematics and Computations Division of the American Nuclear Society Topical Meeting (M&C-2011), May 2011.
  63. P. Barai et al., “Strain-Based Continuum Damage Models for Nuclear Fuels,” Trans. Am. Nucl. Soc. 104, Jun 2011.
  64. S. Allu et al., “Initial Validation of the AMP Nuclear Fuel Performance Code,” Trans. Am. Nucl. Soc. 103, Nov 2010.
  65. G. Davidson et al., “Massively Parallel Solutions to the K-Eigenvalue Problem,” Trans. Am. Nucl. Soc. 103, Nov 2010.
  66. J. Galloway et al., “Generalized Isotopic Tracking Capabilities Within the 3-D BWR Nodal Simulator NESTLE,” Trans. Am. Nucl. Soc. 103, Nov 2010.
  67. G. Maldonado et al., “Integration of the NESTLE Core Simulator within SCALE,” Trans. Am. Nucl. Soc. 100, Jun 2009.
  68. Y. Wang et al., “Progress in the Integration of the 2D DG-FEM Sn Transport Solver Xuthus into SCALE,” Trans. Am. Nucl. Soc. 99, Nov 2008.
  69. K. Clarno, “Parallel (Sn) Transport Algorithm in NEWTRNX,” Proceedings of Reactor Physics Division of the American Nuclear Society Topical Meeting (PHYSOR 2008), Sep 2008.
  70. S. Vilkomir, W. Swain, J. Poore, and K. Clarno, “Modeling Input Space for Testing Scientific Computational Software: A Case Study,” Proceedings of the International Conference on Computational Science (ICCS-2008), Jun 2008.
  71. Greifenkamp, K. Clarno, and J. C. Gehin, “Effect of Fuel Temperature Profile on Eigenvalue Calculations,” Proceedings of the 2008 American Nuclear Society Student Conference, Feb 2008.
  72. Clarno, “Implementation of Generalized Coarse-Mesh Rebalance in NEWTRNX for Acceleration of Parallel Block Jacobi Transport,” Trans. Am. Nucl. Soc. 97, Nov 2007.
  73. R. Johnson and K. Clarno, “Implementation of Transport Synthetic Acceleration in NEWTRNX,” Trans. Am. Nucl. Soc. 97, Nov 2007.
  74. Hamilton, C. R. E. de Oliveira and K. Clarno, “Implementation of Time-Dependent Transport in NEWTRNX,” Trans. Am. Nucl. Soc. 97, Nov 2007.
  75. R. Johnson and K. Clarno, “Comparison of SCALE and MCNP Results for Computational Pebble Bed Benchmarks,” Trans. Am. Nucl. Soc. 96, Jun 2007.
  76. B. Ganapol, K. Clarno, and S. Hamilton, “An Embedded Semi-Analytical Benchmark with Iterative Interpolation for Neutron Transport Methods Verification,” Proceedings of the Joint Supercomputing in Nuclear Applications and Mathematics and Computations Division of the American Nuclear Society Topical Meeting (SNA/M&C-2007), Apr 2007.
  77. M. Williams, J. Gehin, and K. Clarno, “Sensitivity Analysis of Reactivity Responses Using One-Dimensional Discrete Ordinates and Three-Dimensional Monte Carlo Methods,” Proceedings of Reactor Physics Division of the American Nuclear Society Topical Meeting (PHYSOR-2006), Sep 2006.
  78. Z. Zhong, T. Downar, M. DeHart, and K. Clarno, “Coarse Mesh Finite Difference Acceleration in the Two-Dimensional Discrete Ordinates Transport Calculation,” Proceedings of Reactor Physics Division of the American Nuclear Society Topical Meeting (PHYSOR 2006), Sep 2006.
  79. K. Clarno and J. Gehin, “Physics Analysis of the LS-VHTR: Salt Coolant and Fuel Block Design,” Proceedings of Reactor Physics Division of the American Nuclear Society Topical Meeting (PHYSOR 2006), Sep 2006.
  80. K. Clarno, V. de Almeida, E. D’Azevedo, C. de Oliveira, and S. Hamilton, “GNES-R: Global Nuclear Energy Simulator for Reactors, Task 1: High-Fidelity Neutron Transport,” Proceedings of Reactor Physics Division of the American Nuclear Society Topical Meeting (PHYSOR 2006), Sep 2006.
  81. K. Clarno, C. W. Forsberg, and J. C. Gehin, “Physics Analysis of Coolant Voiding in the Advanced High Temperature Reactor,” Trans. Am. Nucl. Soc. 93, Nov 2005.
  82. K. Clarno et al, “Code-To-Code Benchmark of Coolant Void Reactivity (CVR) in the ACR-700 Reactor,” Trans. Am. Nucl. Soc. 93, Nov 2005.
  83. C. Forsberg and K. Clarno “The Advanced High-Temperature Reactor (AHTR): Flux Distribution and Dosimetry,” Proceedings of the International Symposium on Reactor Dosimetry (ISRD-2005), May 2005.
  84. M. Williams and K. Clarno, “Salt Selection for the LS-VHTR,” Proceedings of the International Congress on Advances in Nuclear Power Plants (ICAPP 2006), Jun 2006.
  85. K. Clarno and M. L. Adams, “Recent Improvements in Boundary Conditions for Single-Assembly Calculations,” Trans. Am. Nucl. Soc. 89, Nov 2003.
  86. K. Clarno and M. Adams, “Capturing the Effects of Unlike Neighbors in Single-Assembly Calculations,” Proceedings of the Mathematics and Computations Division of the American Nuclear Society Topical Meeting (M&C-2003), Apr 2003.
  87. K. Clarno and M. Adams, “Improved Boundary Conditions for Assembly-Level Transport Codes,” Proceedings of Reactor Physics Division of the American Nuclear Society Topical Meeting (PHYSOR 2002), Sep 2002.
  88. K. Clarno and Y.A. Hassan, “Development of a RELAP5-3D Three-dimensional Model of a VVER-1000 Nuclear Power Plant for Analysis of a Large-Break Loss-of-Coolant Accident,” Trans. Am. Nucl. Soc. 85, Nov 2001.

Technical Reports

  1. T. Pandya, T. Evans, K. Clarno, B. Collins, “Excore Radiation Transport Modeling with VERA: Manual,” ORNL Report ORNL/SR-2018/ , March 2018.
  2. E. Larsen, et al, “MPACT Version 2.1.0,” ORNL Report ORNL/TM-2017/391, December 2017.
  3. R. Gardner, R. Pawlowski, K. Clarno, S. Stimpson, “Review of Bison Usage in VERA,” ORNL Report ORNL/TM-2017/217, November 2017.
  4. S. Stimpson, K. Clarno, et al, “Demonstration of Coupled Tiamat Quarter Core Calculations on Watts Bar Unit 1, Cycle 1,” ORNL Report ORNL/SR-2017/463, Sep 2017.
  5. S. Stimpson, K. Clarno, et al, “Demonstration of Coupled Tiamat Single Assembly Calculations,” ORNL Report CASL-U-2017-1357-000, June 2017.
  6. K. Clarno, et al, “Software Quality Assurance and Verification for the MPACT Library Generation Process,” ORNL Report ORNL/TM-2017/247, May 2017.  
  7. K. Kim, K. Clarno, et al, “Development of the V4.2m5 and V5.0m0 Multigroup Cross Section Libraries for MPACT for PWR and BWR,” ORNL Report ORNL/TM-2017/95, Mar 2017.  
  8. M. Jessee, D. Wiarda, K. Clarno, et al, “Development and Maintenance of SCALE Lattice and Reactor Physics Capabilities,” ORNL Report ORNL/LTR-2016/585, Sep 2016.  
  9. S. Stimpson, B. Collins, K. Clarno, et al, “MPACT Subgroup Self-Shielding Efficiency Improvements,” ORNL Report ORNL/TM-2016/407, Sep 2016.  
  10. T. Downar, et al, “MPACT Theory Manual, Version 2.2.0,” ORNL Report ORNL/TM-2016/476, Aug 2016.  
  11. M. Jessee, D. Wiarda, K. Clarno, et al, “TRITON: A Multipurpose Transport, Depletion, and Sensitivity and Uncertainty Analysis Module,” ORNL Report ORNL/TM-2016/56, Apr 2016.  
  12. S. Stimpson, K. Clarno, et al, “Standalone BISON Fuel Performance Results for Watts Bar Unit 1, Cycles 1–3,” ORNL Report ORNL/TM-2015/776, Apr 2016.  
  13. M. Williams, “XSPROC: The Cross Section Processing Module for SCALE,” ORNL Report ORNL/TM-2015/721 Apr 2016.  
  14. K. Clarno, “Determine Operating Reactor to Use for the 2016 PCI Level 1 Milestone,” ORNL Report ORNL/SPR-2016/38, Feb 2016.  
  15. K. Clarno, et al, “T0002 SCALE Neutronics Updates for Reactor and Spent Fuel Analyses Task 6: SCALE/TRITON Acceleration,” ORNL Report ORNL/LTR-2016/35, Jan 2016.  
  16. S. Stimpson, K. Clarno, et al, “Executing BISON-CASL Using VERA-CS Output,” ORNL Report ORNL/SPR-2015/609, Dec 2015.  
  17. S. Bowman, K. Clarno, et al, “SCALE Support for Reactor and Spent Fuel Analyses,” ORNL Report ORNL/SPR-2015/572, Oct 2015.  
  18. M. Jessee, U. Mertyurek, K. Clarno, S. Bowman, SCALE Neutronics Updates for Reactor and Spent Fuel Analyses, ORNL/LTR-2014/517, Oct 2014.
  19. R. Pawlowski, K. Clarno, R. Montgomery, Demonstrate Integrated VERA-CS for the PCI Challenge Problem, CASL-I-2014-0153-000, Aug 2014.
  20. S. Palmtag, et al, Demonstration of Neutronics Coupled to Thermal-Hydraulics for a Full-Core Problem using VERA, CASL-U-2013-0196-000, Dec 2013.
  21. B. Rearden, K. Clarno, et al, Report on Used Nuclear Fuel Characterization Enhancements in SCALE, ORNL/LTR-2013/425, Oct 2013.
  22. S. Palmtag, et al, Coupled Single Assembly Solution with VERA (Problem 6), CASL-U-2013-0150-000, Jul 2013.
  23. S. Hayes and K. Clarno, Fuels IPSC Software Quality Assurance Plan V1.2.2, LLNL-TM-493620, Nuclear Energy Advanced Modeling and Simulation (NEAMS) Program, Sep 22, 2011.
  24. A. Phillippe, L. Ott, K. Clarno, and J. Banfield, Analysis of the IFA-432, IFA-597, and IFA-597 MOX Fuel Performance Experiments by FRAPCON-3,4, ORNL/TM-2012/195, Oak Ridge National Laboratory, Oak Ridge, TN, Aug 2012.
  25. K. Clarno and R. Howard, Problem Specification for FY12 Modeling of Used Nuclear Fuel during Extended Storage, ORNL/TM-2012/80, Oak Ridge National Laboratory, Oak Ridge, TN, Feb 2012.
  26. K. Clarno et al., Integrated Radiation Transport and Nuclear Fuel Performance for Assembly-Level Simulations, ORNL/TM-2012/33, Oak Ridge National Laboratory, Oak Ridge, Tenn., Jan 2012.
  27. B. Philip, K. Clarno, and W. Cochran, Software Design Document for the AMP Nuclear Fuel Performance Code, ORNL/TM-2010/34, Oak Ridge National Laboratory, Oak Ridge, TN, Mar 2010.
  28. R. Schmidt, K. Belcourt, K. Clarno et al., Foundational Development of an Advanced Nuclear Reactor Integrated Safety Code, SAND2010-0878, Sandia National Laboratories, Albuquerque, NM, 2010.
  29. K. Clarno and J. Renier, Test Problem #3: 2009 Three-Dimensional Boiling Water Reactor Simulations, ORNL/TM-2009/250, Oak Ridge National Laboratory, Oak Ridge, Tenn., Oct 2009.
  30. T. Evans and K. Clarno, C++ Coding Standards for the AMP Project, ORNL/TM-2009/240, Oak Ridge National Laboratory, Oak Ridge, TN, Oct 2009.
  31. K. Clarno, J. Turner, and G. Hansen, Roadmap to an Engineering-Scale Nuclear Fuel Performance and Safety Code, ORNL/TM-2009/233, Oak Ridge National Laboratory, Oak Ridge, TN, Sep 2009.
  32. R. Primm III, K. Clarno, et al., Design Study for a Low-Enriched Uranium Core for the High Flux Isotope Reactor, Annual Report for the FY 2006, ORNL/TM-2006/136, Oak Ridge National Laboratory, Oak Ridge, TN, Oct 2006.
  33. D. Williams, L. Toth, and K. Clarno, Assessment of Candidate Molten Salt Coolants for the Advanced High Temperature Reactor (AHTR), ORNL/TM-2006/12, Oak Ridge National Laboratory, Oak Ridge, TN, Mar 2006.
  34. D. Ingersoll, K. Clarno, C. Forsberg, J. Gehin, R. Christensen, C. Davis, G. Hawkes, J. Sterbentz, T. Kim, T. Taiwo, and W. Yang, Status of Physics and Safety Analyses for the Liquid-Salt–Cooled Very High-Temperature Reactor (LS-VHTR), ORNL/TM-2005/218, Oak Ridge National Laboratory, Oak Ridge, TN, Dec 2005.
  35. D. Ingersoll, K. Clarno et al., Trade Studies for the Liquid-Salt-Cooled Very High-Temperature Reactor: Fiscal Year 2006 Progress Report, ORNL/TM-2006/140, Oak Ridge National Laboratory, Oak Ridge, TN, Feb 2007.
  36. K. Clarno, “TXYPL – TXY with General Anisotropic Scattering,” Bechtel Bettis Atomic Power Laboratory Internal Letter, B-MER(ACRE)-59 and Attachment, Jul 2003.

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