α-weighted Transition Rate Matrix Method

Conference · Thu Aug 01 00:00:00 EDT 2019

OSTI ID:1559649

Variansyah, Ilham ^[1]; Betzler, Benjamin R.  ^[2]; Martin, William R. ^[3]

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1. University of Michigan Department of NE
2. ORNL
3. University of Michigan

Relative effectiveness of an α-weighted Transition Rate Matrix Method (TRMM) as compared to the normally used κ- weighted, for solving reactor transient problem is investigated. An improved Monte Carlo κ-α iteration with delayed neutron is implemented to the OpenMC to generate the fundamental α-eigenfunction to be used as the weighting function in calculating the TRMM forward and adjoint operators. A prompt supercritical transient problem and a deep subcritical transient problem of a two-region slab system are devised to compare the relative performance of the α- and κ-weighted TRMM.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1559649
• Resource Relation: Conference: International Conference on Mathematics and Computational Methods applied to Nuclear Science and Engineering (M&C 2019) , Portland, Oregon, United States of America , 8/25/2019-8/29/2019
• Country of Publication: United States
• Language: English