Performance Improvements for Coarse Mesh Finite Difference Acceleration L3:RTM.PRT.P13.02

Technical Report · Tue May 31 04:00:00 EDT 2016

DOI:https://doi.org/10.2172/1338525· OSTI ID:1338525

Collins, Benjamin S. ^[1]; Hamilton, Steven P. ^[1]; Stimpson, Shane ^[1]; Yee, Ben ^[2]; Larsen, Edward W. ^[2]; Kochunas, Brendan ^[2]

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1. Oak Ridge National Lab. (ORNL), Oak Ridge, TN (United States)
2. Univ. of Michigan, Ann Arbor, MI (United States)

The development of VERA-CS in recent years has focused on developing the capability to simulate multiple cycles of operating commercial nuclear power plants. Now that these capabilities have advanced to the point where it is being deployed to users, the focus is on improving the computational performance of various components in VERA-CS. In this work, the focus is on the Coarse Mesh Finite Difference (CMFD) solution in MPACT. CMFD serves multiple purposes in the 2D/1D solution methodology. First, it is a natural mechanism to tie together the radial MOC transport and the axial SP3 solution. Because the CMFD system solves the multigroup three-dimensional core in one system, it pulls together the global response of the system. In addition, the CMFD solution provides a framework to accelerate the convergence of the eigenvalue problem.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States). Oak Ridge Leadership Computing Facility (OLCF)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1338525
• Report Number(s): ORNL/TM--2016/232; NT0304000; NEAF343; CASL-U-2016-1106-000
• Country of Publication: United States
• Language: English

Related Subjects

21 SPECIFIC NUCLEAR REACTORS AND ASSOCIATED PLANTS
COMPUTERIZED SIMULATION
CONVERGENCE
EIGENVALUES
FINITE DIFFERENCE METHOD
M CODES
MATHEMATICAL SOLUTIONS
NUCLEAR POWER PLANTS
PERFORMANCE
REACTOR OPERATION
THREE-DIMENSIONAL CALCULATIONS
TRANSPORT THEORY