2014/05/12 by Thomas Clerc, Clerc, Thomas, Alain Hébert +9
Earth and Planetary Sciences · Engineering · Environmental Science · #FOS: Physical sciences #Meteorological Phenomena and Simulations #Nuclear Theory (nucl-th) #Nuclear reactor physics and engineering #Soil Moisture and Remote Sensing
paper · pdf · doi:10.48550/arxiv.1405.2659
openalex publication_date 2014/05/12 · openalex created_date 2022/10/03 · openalex updated_date 2026/07/28
This paper presents a computational scheme for the determination of\nequivalent 2D multi-group heterogeneous reflectors in a Pressurized Water\nReactor (PWR). The proposed strategy is to define a full-core calculation\nconsistent with a reference lattice code calculation such as the Method Of\nCharacteristics (MOC) as implemented in APOLLO2 lattice code. The computational\nscheme presented here relies on the data assimilation module known as\n"Assimilation de donn 'ees et Aide `a l'Optimisation (ADAO)" of the SALOME\nplatform developed at 'Electricit 'e De France (EDF), coupled with the\nfull-core code COCAGNE and with the lattice code APOLLO2. A first validation of\nthe computational scheme is made using the OPTEX reflector model developed at\n 'Ecole Polytechnique de Montr 'eal (EPM). As a result, we obtain 2D\nmulti-group, spatially heterogeneous 2D reflectors, using both diffusion or\n\SP\N operators. We observe important improvements of the\npower discrepancies distribution over the core when using reflectors computed\nwith the proposed computational scheme, and the \SP\N operator\nenables additional improvements.\n