秦山核电厂压水堆燃料组件定位格架设计

Design of the Spacer Grid of the PWR Fuel Assembly for Qinshan Nuclear Power Plant

秦山核电厂压水堆燃料组件定位格架是六点支撑15×15排列弹簧定位格架。文中列出了设计依据和要求,介绍了计算和试验的结果,并详细地从物理、热工、水力、机械几个方面评价定位格架的设计。

The spacer grid of the PWR fuel assembly for Qinshan Nuclear Power Pl-ant is a spring structure with 15×15 square array.Each fuel rad is laterallysupported at six contact points in each cell of the grid by the combination offixed dimples and spring straps.The design basis and requirement are presen-ted,The results of the calculation and experiments are discussed.Any designevaluation of the grid in nuclear,thermal-hydraulic and mechanical aspects hasbeen made.The analysis shows that the parformance of the grid meets all thedesign requirement.