Simulations of neutron noise in the research reactor AKR-2: comparison between a discrete ordinates and a diffusion-based method
Paper in proceeding, 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 Universit├Ąt 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.

Research reactor

Discrete ordinates method

Diffusion theory

Neutron noise

Author

Paolo Vinai

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Antonios Mylonakis

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Huaiqian Yi

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Christophe Demaziere

Chalmers, Physics, Subatomic, High Energy and Plasma Physics

Proceedings of the International Conference on Physics of Reactors, PHYSOR 2022

957-966
9780894487873 (ISBN)

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

Subject Categories

Other Physics Topics

DOI

10.13182/PHYSOR22-37626

More information

Latest update

2/23/2024