1204657-A is referenced by 3 patents.
1,204,657. Fuel elements. COMMISSARIAT A L'ENERGIE ATOMIQUE. 18 June, 1969 [2 July, 1968], No. 30797/69. Heading G6C. A spacer grid for a fuel element assembly comprises a lattice of interassembled sheet metal members 2, 4 which define compartments having a square section, each member 2, 4 being cut-out and comprising two parallel rectilinear ribbon elements 2a, 2b, 4a, 4b, narrow corrugated strips 12 forming a number of projections (e.g. 13, 14, 15) on each side of the member and defining openings 10 between the ribbon elements, and slits 18, 20 forming interruptions in one of the ribbon elements 2a, 4b in the centreline of each opening 10 so as to permit the insertion of the continuous ribbon element 2b, 4a of another sheet metal member.; The sheet metal members 2, 4 are attached at their extremities to similar sheet metal members (Fig. 1, not shown) which form the sides of an outer frame. Each ribbon element 2a, 2b, 4a, 4b is provided, in line with the corrugated strips 12, with bosses 16 directed towards the same side as the projections 13, 15 but of greater height. Each compartment of the grid is limited on each of its four sides by a portion of a sheet metal member, the central part of which is formed by a corrugated strip 12, whilst the corners of each compartment are cut away since they are formed by the junction of the ribbon elements adjacent openings 10.; Each fuel element will be in contact on the one hand with the projection 14 of a sheet metal member 2 and the bosses 16 of the adjacent member 2 and on the other hand with the projection 14 of a sheet metal member 4 and the bosses 16 of the adjacent member 4. The flexibility imparted to each corrugated strip 12 by the projections 13, 15 serves to absorb deformations while permitting the coolant to flow between the strip 12 and the fuel element. For the purpose of guiding control rods, guide tubes can be placed in some of the compartments and secured to the corners of these by means of radial fins. In a fuel element assembly, a number of the abovedescribed grids are secured to each other and to the top and bottom support plates of the assembly by means of spacer tubes, which serve also as passageways for the guide tubes.