Coarse-Mesh Angular Dependent Rebalance Acceleration of the Discrete Ordinates Transport Calculations

Journal Article · Mon Nov 15 00:00:00 EST 2004 · Nuclear Science and Engineering

DOI:https://doi.org/10.13182/NSE03-12· OSTI ID:20808396

Park, Young Ryong; Cho, Nam Zin ^[1]

---

1. Korea Advanced Institute of Science and Technology (Korea, Republic of)

A new nonlinear coarse-mesh rebalance (CMR) method is developed and tested to accelerate the one- and two-dimensional discrete ordinates neutron transport calculations. The method is based on rebalance factors that are angular dependent and defined on the coarse-mesh boundaries only. Unlike the conventional CMR method that is only conditionally stable, Fourier analysis and numerical tests show that this coarse-mesh angular dependent rebalance (CMADR) method is unconditionally stable for any optical thickness, scattering ratio, and coarseness and that the acceleration is very effective in most cases.

• OSTI ID: 20808396
• Journal Information: Nuclear Science and Engineering, Vol. 148, Issue 3; Other Information: Copyright (c) 2006 American Nuclear Society (ANS), United States, All rights reserved. http://epubs.ans.org/; Country of input: International Atomic Energy Agency (IAEA); ISSN 0029-5639
• Country of Publication: United States
• Language: English

Related Subjects

43 PARTICLE ACCELERATORS
ACCELERATION
DISCRETE ORDINATE METHOD
FOURIER ANALYSIS
NEUTRON TRANSPORT
NONLINEAR PROBLEMS
THICKNESS
TWO-DIMENSIONAL CALCULATIONS