Simulations of neutron noise in the research reactor AKR-2: comparison between a discrete ordinates and a diffusion-based method
Övrigt konferensbidrag, 2022

A diffusion-based and a discrete ordinates method are used to simulate a neutron noise experiment in the research reactor AKR-2 at Technische Universität Dresden, Germany. The AKR-2 reactor provides an interesting case for the comparison between the two methods because it is characterized by large heterogeneities and regions with low macroscopic neutron cross sections. For the calculations, the same spatial discretization and the same set of two-energy macroscopic neutron cross sections with isotropic scattering are used. Significant discrepancies between the diffusion-based and discrete ordinates methods are found in regions of the systems where the diffusion approximation is expected to be inaccurate in reproducing characteristics of the static neutron flux and neutron noise.

Discrete ordinates method

Research reactor

Neutron noise

Diffusion theory

Författare

Paolo Vinai

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Antonios Mylonakis

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Huaiqian Yi

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

Christophe Demaziere

Chalmers, Fysik, Subatomär, högenergi- och plasmafysik

International Conference on Physics of Reactors - PHYSOR 2022
Pittsburgh, PA, USA,

Core monitoring techniques and experimental validation and demonstration (CORTEX)

Europeiska kommissionen (EU) (EC/H2020/754316), 2017-09-01 -- 2021-08-31.

Ämneskategorier

Annan teknik

Annan fysik

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Senast uppdaterat

2022-12-19