| 摘要 |
1,123,996. Nuclear fuel elements. SIEMENSSCHUCKERTWERKE A.G. 19 May, 1966 [19 May, 1965], No. 22413/66. Heading G6C. A nuclear fuel element, for a reactor using water at super-critical pressure as coolant and moderator, comprises fuel rods 1 and tubular inserts 3, flow guiding and whirling means for the coolant, and aligning means for the fuel rods, being provided on the walls of the tubular inserts facing adjacent fuel rods. Coolant flows both through and around the tubular inserts. In modifications (a) Figs. 5 and 6 (not shown), the tubular inserts surround the fuel rods; (b) Figs. 8 and 9 (not shown), coolant returns downwardly through the element, passing over superheater rods, and is discharged through a distribution device serving also for the supply of coolant; (c) Fig. 10 (not shown), coolant is circulated through a U-shaped tube before coming into contact with the fuel and superheater rods. The coolant flow guiding means attached to the tubular inserts may comprise helical ribs or projections. The tubular inserts may serve for the introduction of control rods. |
