公开(公告)号：US11664131B2

公开(公告)日：2023-05-30

申请号：US16954716

申请日：2018-12-18

申请人： Electricite de France

发明人： Richard Howard ,  Tingting Xu ,  Serge Bellet

IPC分类号： G21C15/00 ,  G21C13/02

CPC分类号： G21C15/00 ,  G21C13/02

摘要： A nuclear reactor includes a vessel having an outer wall and vessel bottom, and an enclosure delimited by a cylindrical inner wall disposed inside the vessel such that the inner wall and outer wall define a circuit with an annular cross-section. A support element is located adjacent the bottom of the enclosure to hold control elements of the core. A flow diffusion element is positioned between the support element and the vessel bottom and has a circular flat surface portion including disc shaped orifices of the same diameter. The space between the flat portion and the vessel bottom forms an unobstructed mixing zone to allow uniform distribution of flow rates of fluid circulated through the enclosure.