Abstract
In the framework of the EU Horizon 2020 McSAFE project, a Serpent2-SUBCHANFLOW coupling has been developed with the aim at performing large-scale pin-by-pin depletion and transient calculations in Light Water Reactors. While this tool is not tied to a specific type of geometry, a set of capabilities have been developed to generate the pin-level hexagonal models corresponding to VVER reactors. The handling of VVER geometries is based on the use of nested hexagonal regular meshes in Serpent2, pin-level subchannel models in SUBCHANFLOW and unstructured meshes for feedback exchange and interpolation. In this work, these features are explained in detail and illustrated in a VVER-1000 fuel assembly. For this test case, an in-depth analysis is made regarding the modelling considerations in SUBCHANFLOW and their impact on the neutronic solution. In particular, the use of coolant- and fuel-centered subchannels and the explicit modelling of stiffener plates is discussed.
| Original language | English |
|---|---|
| Article number | 106955 |
| Journal | Annals of Nuclear Energy |
| Volume | 135 |
| DOIs | |
| Publication status | Published - Jan 2020 |
| MoE publication type | A1 Journal article-refereed |
Funding
This work was done within the McSAFE project which is receiving funding from the Euratom research and training programme 2014–2018 under grant agreement No 755097.
Keywords
- Multiphysics
- Serpent2
- SUBCHANFLOW
- VVER
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