| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a new and useful U-bend tube support system capable of positioning and restraining a U-bend tube of a water flow pipe in a nuclear reactor steam generator against fluid excitation vibration. <P>SOLUTION: An improved U-bend tube support assembly 200 used in the steam generator of the U-bend tube nuclear reactor includes fan-shaped bars 210 with projections, which are disposed as a fan-shaped bar array 280 with projections, wherein each fan-shaped bar 210 with projections has a number of projections projected from a flat surface or a side surface, its longitudinal section is rectangular as a whole, and the projection is worked in a portion to a lower projecting start radius position 276 of the fan-shaped bar 210 with projections on the side surface of the fan-shaped bar 210 with projections, or molded if not so. The projection start radius position 276 is typically a position where a pipe radius is about 30% of the maximum radius of curvature. <P>COPYRIGHT: (C)2009,JPO&INPIT</p> |
