Abstract
Ants is a nodal neutronics program developed at VTT since 2017. Ants solution method for the nodal diffusion equation is based on the function expansion nodal method (FENM) and analytic function expansion nodal (AFEN) method. Ants supports rectangular, hexagonal and triangular nodal geometries. The solution methodology of Ants extended to solve time-dependent problems is presented in this work. The performance of Ants is presented for all three geometry options in a series of established two- and three-dimensional numerical time-dependent benchmarks for both rectangular and hexagonal lattices. The Ants results agree with other published nodal program results, especially if the problem is not sensitive to control rod cusping effects or a fine enough axial mesh is used.
| Original language | English |
|---|---|
| Article number | 109868 |
| Number of pages | 14 |
| Journal | Annals of Nuclear Energy |
| Volume | 190 |
| DOIs | |
| Publication status | Published - 15 Sept 2023 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work has received funding from the LONKERO project under The Finnish Research Programme on Nuclear Power Plant Safety 2019–2022 (SAFIR2022) and the DECAPOD project under The National Nuclear Safety and Waste Management Research Programme 2023–2028 (SAFER2028) .
Keywords
- AFEN
- Ants
- FENM
- Nodal neutronics
- Time-dependent