REA 3D-dynamic analysis in Almaraz NPP with RELAP5/PARCS v2.7 and SIMTAB cross-sections tables

[EN] The Rod Ejection Accident (REA) belongs to the Reactivity-Initiated Accidents (RIA) category of accidents and it is part of the licensing basis accident analyses required for pressurized water reactors (PWR). The REA at Hot Zero Power (HZP) is characterized by a single rod ejection from a core position with a very low power level. The evolution consists basically of a continuous reactivity insertion. The main feature limiting the consequences of the accident in a PWR is the Doppler Effect. To check the performance of the coupled code RELAP5/PARCS v2.7 a REA in Almaraz NPP is simulated. These analyses will allow knowing more accurately the PWR real plant phenomenology in the RIA most limiting conditions. This work has been partially supported by the Spanish Ministerio de Educación y Ciencia under project PHB2007-0067-PC and by the Brazilian Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES) under project CAPES/DGU 159/08. This work has also been partially supported by the Spanish Ministerio de Educación y Ciencia under project ENE2008-02669, the Generalitat Valenciana under project ACOMP/2009/058, and the Universitat Politècnica de València under project PAID-05-09-4285. The authors wish to acknowledge the technical and financial support of the Almaraz-Trillo AIE for this work. Barrachina Celda, TM.; Garcia-Fenoll, M.; Ánchel Añó, FC.; Miró Herrero, R.; Verdú Martín, GJ.; Pereira, C.; Da Silva, C... (2011). REA 3D-dynamic analysis in Almaraz NPP with RELAP5/PARCS v2.7 and SIMTAB cross-sections tables. Progress in Nuclear Energy. 53(8):1167-1180. https://doi.org/10.1016/j.pnucene.2011.07.012