A discrete ordinates solver with diffusion synthetic acceleration for simulations of 2-D and 2-energy group neutron noise problems
Paper i proceeding, 2019

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.

convergence analysis

diffusion synthetic acceleration

Reactor neutron noise

discrete ordinates


Huaiqian Yi

Chalmers, Fysik, Subatomär fysik och plasmafysik

Paolo Vinai

Chalmers, Fysik, Subatomär fysik och plasmafysik

Christophe Demaziere

Chalmers, Fysik, Subatomär fysik och plasmafysik

Proceedings of M&C 2019


The International Conference on Mathematics and Computational Methods applied to Nuclear Science and Engienering - M&C 2019
Portland, USA,

Core monitoring techniques and experimental validation and demonstration (CORTEX)

Europeiska kommissionen (Horisont 2020), 2017-09-01 -- 2021-08-31.


Annan teknik


Övrig annan naturvetenskap

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