A full reference APOLLO3$^®$ deterministic scheme for the JHR material testing reactor
| Autor: | Gérald Rimpault, Jean-François Vidal, Matthieu Lebreton, Julien Politello |
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| Přispěvatelé: | CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA), APOLLO3® and TRIPOLI-4® are registered trademarks of CEA. We gratefully acknowledge Framatome and EDF for their long-term partnership and their support., CADARACHE, Bibliothèque |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
[PHYS.NUCL] Physics [physics]/Nuclear Theory [nucl-th]
Materials science [PHYS.NUCL]Physics [physics]/Nuclear Theory [nucl-th] [PHYS.NEXP] Physics [physics]/Nuclear Experiment [nucl-ex] Fission QC1-999 020209 energy Nuclear engineering chemistry.chemical_element 02 engineering and technology [PHYS.NEXP]Physics [physics]/Nuclear Experiment [nucl-ex] 7. Clean energy 01 natural sciences Rod JHR Matrix (mathematics) Method of characteristics 0103 physical sciences 0202 electrical engineering electronic engineering information engineering sn method 010308 nuclear & particles physics Physics Deterministic calculation scheme Solver Hafnium APOLLO3$^®$ Lattice (module) S$_n$ method chemistry apollo3® Beryllium |
| Zdroj: | PHYSOR 2020-Transition to a Scalable Nuclear Future PHYSOR 2020-Transition to a Scalable Nuclear Future, Mar 2020, Cambridge, United Kingdom EPJ Web of Conferences, Vol 247, p 06003 (2021) |
| Popis: | JHR is a new material testing reactor under construction at CEA Cadarache. Its high flux core contains 37 fuel assemblies loaded along concentric rings into alveolus of an aluminum matrix. For the operation of the reactor, twenty-seven of these fuel assemblies hovnst hafnium rods in their center while the other ones but also the beryllium radial reflector can accommodate experimental devices. In order to accurately predict its operating core characteristics but also its irradiation performance, a recently developed scheme based on the APOLLO3® platform is being developed which uses the sub-group method for spatial self-shielding, the 2D method of characteristics and the 3D unstructured conform MINARET Sn transport solver. A 2D model of JHR has been built and optimized for calculating, at the lattice step, the self-shielded and condensed cross sections thanks to the sub-group method and the method of characteristics. Results are benchmarked against a TRIPOLI-4® stochastic reference calculation. A more refined spatial mesh gives better results on fission rates and reactivity compared to the ones of the former APOLLO2 scheme. The classical 2-step calculations use the hypothesis of infinite lattice configuration, which is reasonable for the assemblies close to the center but not for peripheral ones. Hence, a new approach is being set up taking into account the surrounding of each assembly. The newly 3-step scheme uses the Sn solver MINARET and gives better results than the traditional 2-step scheme. This approach will be applied to a 3D modelling of the heterogeneous JHR core configurations incorporating experimental devices and enabling burn up calculations. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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