Conference paper Open Access
A discrete ordinates solver with diffusion synthetic acceleration for simulations of 2-D and 2-energy group neutron noise problems.
Huaiqian, Yi; Vinai, Paolo; Demazière, Christophe
A neutron transport solver for 2-D, 2-energy-group neutron noise problems is presented. The
simulator allows to determine: 1) the static neutron flux associated with a critical system; 2)
the neutron noise in the frequency domain, according to a prescribed perturbation of the critical
system. The perturbation is modeled as stationary fluctuations of the macroscopic nuclear
cross-sections. The solution algorithm is based on a diamond finite difference scheme, discrete
ordinates method, and it is accelerated using a diffusion synthetic acceleration technique. The
solver is tested on 2-D homogeneous and heterogeneous systems with a localized neutron
noise source. Its convergence is analyzed and compared to the case without acceleration.
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- Publication date:
- August 25, 2019
- DOI:
-
- Keyword(s):
- Reactor neutron noise, discrete ordinates, diffusion synthetic acceleration, convergence analysis
- Grants:
-
European Commission:
- CORTEX - Core monitoring techniques and experimental validation and demonstration (754316)
- Meeting:
- Mathematics & Computational Methods Applied to Nuclear Science & Engineering (M&C 2019), Portland, Oregon, USA, 25-29 August, 2019
- License (for files):
- Creative Commons Attribution 4.0 International