MPACT Theory Manual Version 2.0.0

Technical Report · Sun Mar 01 00:00:00 EST 2015

DOI:https://doi.org/10.2172/3007863· OSTI ID:3007863

Collins, Benjamin ^[1]; Downar, Thomas ^[2]; Gehin, Jess ^[3]; Godfrey, Andrew ^[4]; Graham, Aaron ^[2]; Jabaay, Daniel ^[2]; Kelley, Blake W. ^[2]; Clarno, Kevin ^[4]; Kim, Kang Seog ^[4]

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1. Oak Ridge National Laboratory (ORNL)
2. Univ. of Michigan, Ann Arbor, MI (United States)
3. Idaho National Laboratory (INL), Idaho Falls, ID (United States)
4. Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

This theory manual describes the three-dimensional (3-D) whole-core, pin-resolved transport calcula- tion methodology employed in the MPACT code. To provide sub-pin level power distributions with sufficient accuracy, MPACT employs the method of characteristics (MOC) solutions in the framework of a 3-D coarse mesh finite difference (CMFD) formulation. MPACT provides a 3D MOC solution, but also a 2D/1D solution in which the 2D planar solution is provided by MOC and the axial coupling is resolved by one-dimensional (1-D) lower order (diffusion or P3) solutions.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE Office of Nuclear Energy (NE)
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 3007863
• Report Number(s): CASL-U--2015-0078-000
• Country of Publication: United States
• Language: English