Modeling Heterogeneous Geometry Problems Using New Capabilities of the High-Fidelity Neutron Transport Code PROTEUS
- Restrictions on Access:
- Open Access.
- PROTEUS is the high-fidelity deterministic neutron transport solver integrated in the multi-physics SHARP suite under NEAMS project, which provides heterogeneous geometry neutron transport capability for coupled multi-physics nuclear reactor applications. PROTEUS is not meant to replace legacy neutronics codes for routine analysis but to address legacy code limitations: 1) problem size limitations (memory); 2) time-to-solution limitations (wall-clock time); 3) structured geometry (unable to represent arbitrary geometry); 4) homogenized geometry (loss of fidelity, local feedback effects under-predicted). The final goal is the applicability for reactor dynamics calculations which require high-fidelity to properly represent local phenomena and feedback from other physics codes. For that reason, it is needed the development of high-fidelity, highly scalable neutronics tools to transitioning from homogenized geometry to heterogeneous geometry analysis PROTEUS includes different neutron transport solvers: SN (discrete ordinates) and MOC (method of characteristics). PROTEUS-SN is an even-parity second-order discrete ordinate, unstructured finite element-based solver that scales from desktop to leadership computing machines. PROTEUS-MOC includes two different approaches. One is an unstructured finite element-based 3D MOC code and the other is a 2D-3D MOC code in which a 2D MOC is combined with the discontinuous Galerkin method for the treatment of the axial direction. PROTEUS-MOC is being developed as a feasible alternative to PROTEUS-SN to handle 3D heterogeneous problems with complicated geometries. Since the characteristics method is numerically more efficient and making use of the new built-in mesh toolkit in PROTEUS suit that allows treating easily complex geometries, PROTEUS-MOC is presented as a robust and stable advanced solver. The implementation of the cross section application programming interface, making use of a generalized cross section library, expands the applicability of PROTEUS for both, fast and thermal reactors for multiple configurations, even for large reactor problems. To verify PROTEUS capabilities, in this work is presented a suite of test cases ranging from pin cell problems through assembly problems, to reactor core problems, for thermal reactor benchmark based on NEA/OECD C5G7 benchmark (benchmark for deterministic transport calculations without spatial homogenization).
- Dissertation Note:
- M.S. Pennsylvania State University 2016.
- Reproduction Note:
- Library holds archival microfiches negative and service copy. 1 fiche. (Micrographics International, 2016)
- Technical Details:
- The full text of the dissertation is available as an Adobe Acrobat .pdf file ; Adobe Acrobat Reader required to view the file.
View MARC record | catkey: 17734977