Integral Transport Methods for 2-D Neutron Transport Problems


Discrete ordinates methods for neutral particle transport introduce ray effects, numerical artifacts arising from the discretization of the angular variable. Integral transport methods avoid this by eliminating angular variables entirely through integration over the solid angle. This project develops a Nyström-based approach to estimate scalar flux in two-dimensional fixed-source neutron transport problems in heterogeneous media, with isotropic scattering and vacuum and reflective boundary conditions. By working directly with the integral form of the transport equation, the method sidesteps ray effects while maintaining accuracy in geometrically complex configurations.
Doctoral Dissertation advised on the subject:

Publications


[J26] On the application of the Nyström method to two-dimensional neutral particle transport problems in heterogeneous media


Gustavo A. Lorensi, Leonardo R.C. Moraes, Richard Vasques, Esequia Sauter, Fabio S. Azevedo

Nuclear Science and Engineering, vol. 199, 2025 Oct, pp. S235–-S248



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