| 摘要 |
1,132,919. Fuel elements. COMMISSARIAT A L'ENERGIE ATOMIQUE. 10 Nov., 1967 [12 Dec., 1966], No. 51233/67. Heading G6C. A fuel element assembly comprises a bundle of canned fuel pencils 12 supported at their upper ends within a graphite sleeve 10 by a dished lattice-form grid 14 having a curvature, when viewed in section, which may be paraboloid or spheroid. In alternative arrangements (not shown) the grid 14 may be dished upwardly or may be situated at the lower end of the fuel element assembly. Round-head rivets 30 disposed at the nodes of the grid lattice support the pencils 12 through a curved surface 34 formed in a nut 32 screwed on a threaded stud 38 of the pencil, the nut being slotted to receive the lattice arms. In a modification (Fig. 3, not shown) the rivets 30 are replaced by bosses shaped in the grid by die-stamping. |
