| 摘要 |
<p>A nuclear reactor fuel assembly grid measuring method and device, including a grid measuring tool mounted on an X, Y, X positioner having a force limiter for each of these three axes and a grid clamping tool. The grid measuring tool is a combination of: a movable, spring-loaded, caliper assembly; a caliper stand assembly; and a base assembly. TV cameras are mounted on the base assembly to allow remote viewing and positioning of the caliper assembly and monitoring of the overall measuring process. An additional separate force limiter is provided near the caliper assembly to prevent excessive force from being applied to the delicate fuel assembly grids. Measurements are taken only after the caliper assembly is positioned upon the grid. Finally, a linear variable differential transformer is associated with the caliper assembly for enhancing accuracy of the measurements.</p> |
