| 摘要 |
<p>The nuclear fuel assembly tie plate (22) is formed by intersecting strips (24, 26) delimiting between them tubular guide cells (28) each for allowing a fuel rod (4) to extend through the tie plate (22). The strips (24, 26) delimit between them tubular flow cells (30, 32) separate from the guide cells (28), each flow cell (30, 32) for allowing coolant flow through the tie plate (22). Guide cells (28) and flow cells (30, 32) are arranged at nodes of a lattice defined by a repeating pattern (P) comprising four corner nodes in a square lattice arrangement and a central node at the center of the four corner nodes, with one guide cell (28) at each corner nodes, separated by a pair of parallel spaced strips (24) intersecting a pair of parallel spaced strips (26), said two pairs of strips delimiting a four-walled central flow cell (32) at the center node.</p> |
