Title: VVER-1000 fuel assembly model in CAD-based unstructured mesh for MCNP6
Authors: Lovecký, Martin
Závorka, Jiří
Vimpel, Jan
Citation: LOVECKÝ, M., ZÁVORKA, , VIMPEL, J. VVER-1000 fuel assembly model in CAD-based unstructured mesh for MCNP6. In Proceedings of the twenty-eight Symposium of AER. Budapest: Kiadja az MTA Energiatodomanyi Kutatokozpont, 2018. s. 261-265. ISBN: 978-963-7351-30-3
Issue Date: 2018
Publisher: Kiadja az MTA Energiatodomanyi Kutatokozpont
Document type: konferenční příspěvek
URI: http://hdl.handle.net/11025/33833
ISBN: 978-963-7351-30-3
Keywords in different language: Monte Carlo;constructive solid geometry;unstructured mesh
Abstract in different language: Geometry models for Monte Carlo transport codes have been using standard constructive solid geometry (CSG). The standard approach is using analytical equations for defining surfaces from which spatial cells are constructed. Both union and intersection operators are available, therefore, arbitrary 3-D geometry can be modeled with CSG. However, this approach can be quite time consuming and possibly error prone for complex models. Monte Carlo transport codes are continuously developed, one of the paths is using CAD-based mesh geometry. MCNP6 features unstructured meshes (UM) created with Abaqus/CAE as geometry description. Attila4MC package for creation of UM geometry from CAD model can be used for MCNP6 models. VVER-1000 fuel assembly model in UM geometry was created for TVSA-T.mod.2 fuel type. This TVSA fuel type is exclusively operated at Temelin NPP in Czechia. Creation of the model consists of deleting small assembly parts that can be neglected for transport calculations, choosing the size of tetrahedron mesh cells and verification of the model. Basic validation of the model was performed, initially for criticality calculations. In the future, the model will be used for criticality safety analyses, preparation of boundary conditions for diffusion codes and radiation shielding analyzes of spent fuel transport and storage facilities.
Rights: Plný text je přístupný v rámci univerzity přihlášeným uživatelům.
© Kiadja az MTA Energiatodomanyi Kutatokozpont
Appears in Collections:Konferenční příspěvky / Conference papers (RICE)
Konferenční příspěvky / Conference papers (KEE)

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