MPACT is based on the Method of Characteristics transport approach for 2D problems with cross section weighting based on the subgroup methodology. The code can be executed in parallel to reduce overall run time. For 3D problems, MPACT uses the 2D/1D method which uses 2D MOC in a radial plane and diffusion or Pn in the axial direction. A 51-group library with subgroup parameters is provided.
The following features are Stable:
- Support for Linux OS (32-bit and 64-bit)
- Parallel Spatial Decomposition with MPI
- Parallel Angular Decomposition with MPI
- User defined Macroscopic Cross Sections
- 51-group Macroscopic Cross Section Library Data
- Subgroup Resonance Self-Shielding
- Transport Corrected P0
- Export of Mesh to Legacy VTK file and Parallel VTU for visualization
- 2-D MOC Transport Kernel
- Coarse Mesh Finite Difference (CMFD) Acceleration
- 1-D Nodal Kernels based on NEM-Diffusion and Pn
- 2-D/1-D Full Core Solution
- Multi-State Calculation Capability
- Transient Calculation Capability
- Depletion and Decay
- Critical Boron Search
- Equilibrium Xenon Calculation
- Direct Coupling with COBRA-TF
- Simplified Internal T/H
- General PWR Geometry Modeling
- IFBA
- Control Rods and Control Rod Banks
- Burnable Poison Inserts
- Fission Chamber Detectors
- Grid spacers, Nozzles, Plenum, Baffle, etc.
- Semi-Explicit modeling of grid spacers
- Isotopic Restart File
- Cycle-to-Cycle Fuel Shuffling
- Radial Thermal Expansion
More information on MPACT can be found at https://www.ornl.gov/division/rnsd/projects/mpact