A MOC-based neutron kinetics model for noise analysis
| Autor: | A. Gammicchia, Sandra Dulla, Simone Santandrea, Z. Stankovski, P. Mosca, Richard Sanchez, Igor Zmijarevic |
|---|---|
| Přispěvatelé: | Service des Réacteurs et de Mathématiques Appliquées (SERMA), Département de Modélisation des Systèmes et Structures (DM2S), CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay-CEA-Direction des Energies (ex-Direction de l'Energie Nucléaire) (CEA-DES (ex-DEN)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris-Saclay, Politecnico di Torino = Polytechnic of Turin (Polito), Service d’Études des Réacteurs et de Mathématiques Appliquées (SERMA) |
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
[PHYS]Physics [physics] 020209 energy Detector 02 engineering and technology Solver 2D MOC 01 natural sciences Domain (mathematical analysis) 010305 fluids & plasmas Noise Neutron kinetics Neutron noise Nuclear Energy and Engineering Method of characteristics Bundle 0103 physical sciences 0202 electrical engineering electronic engineering information engineering Time domain Statistical physics Eigenvalues and eigenvectors |
| Zdroj: | Annals of Nuclear Energy Annals of Nuclear Energy, Elsevier Masson, 2020, 137, pp.107070-. ⟨10.1016/j.anucene.2019.107070⟩ Annals of Nuclear Energy, 2020, 137, pp.107070-. ⟨10.1016/j.anucene.2019.107070⟩ |
| ISSN: | 0306-4549 |
| DOI: | 10.1016/j.anucene.2019.107070⟩ |
| Popis: | A 2-D noise model is implemented in the deterministic reactor code APOLLO3® to simulate a periodic oscillation of a structural component. The Two/Three Dimensional Transport (TDT) solver, using the Method of Characteristics, is adopted for the calculation of the case studies, constituted by a moving detector and control-rod bundle. The periodic movement is built by properly linking the geometries corresponding to the temporal positions. The calculation is entirely performed in the real time domain, without resorting to the traditional frequency approach. A specifically defined dynamic eigenvalue is used to renormalize in average the reactivity over a period. The algorithm is accelerated by the DP N synthetic method. For each cell of the domain, the time values of fission rates are analysed to determine the noise extent. Moreover we propose a systematic approach to the definition of the macroscopic cross sections to be used in dynamical calculations starting from library data. As an aside of our work we have found that even in static calculation this approach can produce significant changes. |
| Databáze: | OpenAIRE |
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