https://doi.org/10.1051/epjconf/202124704013
GENERATING ALBEDO BOUNDARY CONDITIONS FOR NODAL DIFFUSION CODES USING SERPENT 2
1 VTT Technical Research Centre of Finland Ltd P.O. Box 1000, FI-02044 VTT, FINLAND
2 Fortum Power and Heat Ltd P.O. Box 100, FI-00048 FORTUM, FINLAND
ville.valtavirta@vtt.fi
jaakko.kuopanportti@fortum.com
antti.rintala@vtt.fi
Published online: 22 February 2021
We use the Serpent Monte Carlo code to produce total and partial albedo boundary conditions that can be used to model the Loviisa NPP VVER-440 core with the nodal neutronics tools of Fortum. The albedo generation process is described in detail. The dependence of the generated albedos on boron content and water density is investigated and a clear distinction is noted in water density dependence between regions containing mostly water and those containing mostly structural materials. The Serpent generated albedos are currently used in production calculations for modeling the Loviisa reactors at Fortum.
Key words: Serpent / albedo / nodal diffusion / boundary condition / Apros
© The Authors, published by EDP Sciences, 2021
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
