【摘要】 17×17核电燃料组件定位格架的264个燃料棒栅元中上、下刚凸高度差值是定位格架重要的质量参数。通过研究采用双测头测量上、下刚凸高度差值,采用平行片簧机构控制两测头间的微位移,研制的测量装置不确定度σ ≤4 μm。通过生产中对格架的测量,说明所研究的测量格架刚凸高度差值的装置和方法是可行的。更多还原

【Abstract】 There are 264 cell for fastening fuel rods in the grid of 17×17 fuel assembly of PWR. The height differences of top and bottom dimples in a grid is an important quality characteristic of the grid. The report deals with measuring machine and method for dimples height differences of the grid. The device has two measuring probes. The Parallel Leaf Spring is used for transmitting the little displacement between two probes. The uncertainty of the device is σ ≤4 μm. The measuring method is shown to be practicable.更多还原