FUEL ROD SUPPORT INSERT FOR A NUCLEAR FUEL ASSEMBLY SPACER GRID, SPACER GRID AND NUCLEAR FUEL ASSEMBLY
Номер патента: US20150287481A1. Автор: Desbois Julien, Marx Veit, Peucker Jörg, Schmidt Norbert. Владелец: AREVA NP. Дата публикации: 08-10-2015.A fuel rod support insert for a nuclear fuel assembly spacer grid, a spacer grid and a nuclear fuel assembly are provided. The support insert is for a nuclear fuel assembly spacer grid comprising interlaced straps defining a lattice of cells for receiving fuel rods, the insert being adapted to be secured to the straps for extending in at least one cell. The insert extends along an axis intended to be parallel to that of a cell and comprises two axially spaced end portions for connecting the insert to the straps and at least one elongated blade-like spring extending axially between the end portions for supporting a fuel rod. The spring has a non-rectilinear cross-section in each plane perpendicular to the insert axis. 119-. (canceled)20. A fuel rod support insert for a nuclear fuel assembly spacer grid , the spacer grid including interlaced straps defining a lattice of cells for receiving fuel rods , the fuel rod support insert comprising:two axially spaced end portions for connecting the fuel rod support insert to the straps; andat least one elongated blade-like spring extending axially between the end portions for supporting a fuel rod, the fuel rod support insert being adapted to be secured to the straps for extending in at least one of the cells, the fuel rod support insert extending along an insert axis intended to be parallel to that of the at least one of the cells, the spring having a non-rectilinear cross-section in each plane perpendicular to the insert axis.21. The fuel rod support insert as recited in wherein the spring comprises two adjacent wings extending side-by-side along the insert axis and inclined one relative to the other claim 20 , the wings including a contact wing for contacting the fuel rod and a lateral wing laterally extending the contact wing.22. The fuel rod support insert as recited in wherein the lateral wing is flat.23. The fuel rod support insert as recited in wherein the contact wing has a convex outer surface.24. The fuel rod ...
