安全壳内高能管道发生破口之后,高速喷射的流体会冲击附近的设备和结构,产生不同类型的碎片。这些碎片会随地坑内的流体迁移到再循环滤网表面上,甚至会穿过滤网进入一回路管道和设备中,堵塞长期冷却循环通道,影响事故后堆芯热量的导出...安全壳内高能管道发生破口之后,高速喷射的流体会冲击附近的设备和结构,产生不同类型的碎片。这些碎片会随地坑内的流体迁移到再循环滤网表面上,甚至会穿过滤网进入一回路管道和设备中,堵塞长期冷却循环通道,影响事故后堆芯热量的导出。本文研究了破口喷射参数和不同材料破坏压力对应的碎片影响区域(Zone of Influence)半径计算方法。根据不同的破口类型和破口上游流体参数,计算破口处的喷射压力和质量流量。分析高速喷射流形成的几何形状和压力分布,计算沿喷射流方向不同距离的喷射压力和径向压力,最后根据材料的破坏压力折算成碎片影响区域半径ZOI,可作为电站碎片分析的分析参考。展开更多
The process of endowment insurance system plan as a whole is an important step of old-age insurance system reform in our country. At present, the process of endowment insurance system plan as a whole's process etxcou...The process of endowment insurance system plan as a whole is an important step of old-age insurance system reform in our country. At present, the process of endowment insurance system plan as a whole's process etxcountered bottlenecks. Come to the conclusion after analysis, the basic old-age insurance system across the country plan as a whole facing same questions, such as the regional income is different, the regional replacement rate of endowment insurance system is different, the "fragmentation" phenomenon of regional endowment insurance system, impact both fairness and efficiency of the basic endowment insurance system.展开更多
文摘安全壳内高能管道发生破口之后,高速喷射的流体会冲击附近的设备和结构,产生不同类型的碎片。这些碎片会随地坑内的流体迁移到再循环滤网表面上,甚至会穿过滤网进入一回路管道和设备中,堵塞长期冷却循环通道,影响事故后堆芯热量的导出。本文研究了破口喷射参数和不同材料破坏压力对应的碎片影响区域(Zone of Influence)半径计算方法。根据不同的破口类型和破口上游流体参数,计算破口处的喷射压力和质量流量。分析高速喷射流形成的几何形状和压力分布,计算沿喷射流方向不同距离的喷射压力和径向压力,最后根据材料的破坏压力折算成碎片影响区域半径ZOI,可作为电站碎片分析的分析参考。
文摘The process of endowment insurance system plan as a whole is an important step of old-age insurance system reform in our country. At present, the process of endowment insurance system plan as a whole's process etxcountered bottlenecks. Come to the conclusion after analysis, the basic old-age insurance system across the country plan as a whole facing same questions, such as the regional income is different, the regional replacement rate of endowment insurance system is different, the "fragmentation" phenomenon of regional endowment insurance system, impact both fairness and efficiency of the basic endowment insurance system.