Technical Reports



  • M. Pilch et al., “MPACT Code Verification and Solution Verification,” CASL-U-2019-1935-000, May 2019.
  • B. Kochunas, K. S. Kim, and S. Stimpson, “VERA Enhancements for ATF,” CASL-U-2019-1748-000, Jan. 2019.


  • B. Kochunas, A. Fitzgerald, C. Gentry, K. S. Kim, and Y. Liu, “MPACT Development Activities,” CASL-U-2018-1672-000, Sep. 2018.
  • A. Wysocki, J. Hu, R. Salko, and B. Kochunas, “Improvement of CTF for RIA Analysis,” CASL-U-2018-1608-000, Apr. 2018.
  • B. Kochunas and A. Wysocki, “Performing RIA Calculations with VERA-CS,” CASL-U-2018-1589-000, Apr. 2018.
  • B. Kochunas et al., “MPACT RIA Transient Modeling,” CASL-U-2018-1544-000, Mar. 2018.
  • M. Jarrett, B. Kochunas, and T. Downar, “KRITZ-2 Benchmark Results with MPACT,” CASL-U-2018-1955-000, Sep. 2018.
  • A. Gerlach, B. Kochunas, and R. Salko, “Validation of RIA with SPERT,” CASL-U-2018-1643-000, Dec. 2018.
  • T. Downar, B. Kochunas, Y. Liu, B. Collins, and S. Stimpson, “MPACT Verification and Validation Manual (rev 4),” CASL-U-2018-1641-000, Jun. 2018.


  • B. Kochunas, “VERA-CS User Support Activities for PoR 14,” CASL-U-2017-1295-000, Mar. 2017.
  • K. S. Kim et al., “Development of the V4.2m5 and V5.0m0 Multigroup Cross Section Libraries for MPACT for PWR and BWR,” CASL-U-2017-1280-000, Feb. 2017.
  • B. Kochunas et al., “Development of Transient MPACT-CTF Capability for RIA with DNB,” CASL-U-2017-1424-000, Sep. 2017.
  • Z. Dodson, B. Kochunas, K. S. Kim, Y. Liu, B. Yee, and T. Downar, “Update to MPACT Modeling of DIMPLE Benchmark Problems,” CASL-U-2017-1294-000, Mar. 2017.
  • A. Wysocki, A. Gerlach, B. Kochunas, and R. Salko, “Initial Implementation of Transient VERA-CS,” CASL-U-2017-1303-000, Apr. 2017.
  • B. Kochunas, Z. Dodson, A. Fitzgerald, M. Jarrett, B. Yee, and S. Stimpson, “MPACT Development Activities at University of Michigan,” CASL-U-2017-1423-000, Sep. 2017.
  • A. Fitzgerald, B. Kochunas, and T. Downar, “Investigation of the Method of Characteristics on the Intel Many Integrated Core Architecture,” CASL-U-2017-1327-000, May 2017.
  • B. Kochunas, D. Jabaay, and R. Salko, “Restart File Improvements for MPACT,” CASL-U-2016-1120-000, Jan. 2017.


  • B. C. Yee, B. Kochunas, and T. Downar, “MPACT Modeling of DIMPLE Benchmark Problems,” CASL-U-2016-1045-000, Feb. 2016.
  • B. Kochunas and D. Jabaay, “3-D BWR Modeling Capability in MPACT,” CASL-U-2016-1241-000, Oct. 2016.
  • B. Kochunas, D. Jabaay, S. Palmtag, Z. Han, and A. Fitzgerald, “Thermal Expansion XML Preprocessor for VERA-CS,” CASL-U-2016-1120-000, Jun. 2016.
  • T. Downar, Y. Xu, A. Zhu, B. Kochunas, and D. Jabaay, “Transient Capability in MPACT with Internal Heat Conduction Feedback for Analysis of PWR Reactivity Insertion Accidents (RIA),” CASL-U-2016-1188-000, Sep. 2016.
  • B. Kochunas et al., “MPACT Performance Improvements in VERA-CS,” CASL-U-2016-1115-000, Jun. 2016.
  • M. Jarrett, B. Kochunas, A. Fitzgerald, and T. Downar, “Improvements to the 3D MOC Solver in MPACT,” CASL-U-2016-1232-000, Sep. 2016.


  • A. Godfrey et al., “VERA Benchmarking Results for Watts Bar Nuclear Plant Unit 1 Cycles 1-12,” CASL-U-2015-0206-000, Jun. 2015.
  • B. Kochunas, D. Jabaay, J. Kulesza, and T. Downar, “MPACT Code Preparations for RSICC Release,” CASL-U-2015-0019-000, Feb. 2015.
  • B. Kochunas, D. Jabaay, and T. Downar, “VERA Problem 10: Restart and Shuffling in MPACT,” CASL-U-2014-0231-001, Feb. 2015.
  • B. Kochunas, D. Jabaay, A. Fitzgerald, T. Downar, and S. Palmtag, “Initial BWR Modeling Capability for MPACT,” CASL-U-2015-0265-000, Jul. 2015.
  • T. Downar, B. Kochunas, and B. Collins, “MPACT Verification and Validation: Status and Plans,” CASL-U-2015-0134-000, Apr. 2015.


  • B. Collins, A. Graham, A. Zhu, B. Kochunas, and T. Downar, “Demonstration of Full Core Reactor Depletion with MPACT,” CASL-U-2014-0140-000, Aug. 2014.
  • K. S. Kim, B. Collins, and B. Kochunas, “Review of the CASL Core Simulator MPACT,” CASL-X-2014-0046-000, Mar. 2014.
  • B. Kochunas, W. Wieselquist, and A. Zhu, “ORIGEN Integration into MPACT,” CASL-U-2014-0114-000, Jul. 2014.
  • B. Kochunas et al., “Operational Reactor Depletion Analysis Capability,” CASL-U-2014-0189-000, Sep. 2014.
  • B. Kochunas, D. Jabaay, B. Collins, and T. Downar, “Demonstration of Neutronics Coupled to Thermal-Hydraulics for a Full-Core Problem using COBRA-TF/MPACT,” CASL-U-2014-0051-000, Apr. 2014.
  • B. Collins, A. Zhu, B. Kochunas, and T. Downar, “Demonstration of Advanced Pin-Resolved Depletion with MPACT,” CASL-U-2013-0276-001, Feb. 2014.


  • B. Kochunas, D. Jabaay, B. Collins, and T. Downar, “Coupled Single Assembly Solution with COBRA-TF/MPACT (Problem 6),” CASL-U-2013-0230-000, Nov. 2013.


  • B. Collins, B. Kochunas, A. Godfrey, and T. Downar, “Demonstration of Advanced Pin-Resolved Method of Characteristics (MOC) Capabilities for Neutron Transport,” CASL-U-2012-0174-000, Dec. 2012.


  • B. Kochunas, T. Downar, R. Brewster, and E. Baglietto, “DeCART/STAR-CCM+ Coupled Simulation of a Quarter-Core C/E Plant,” CASL-U-2011-0075-000, Jun. 2011.